Updated on 2025/09/30

写真a

 
CHANG Hochol
 
Organization
Faculty of Science and Engineering Professor
Other responsible organization
Applied Chemistry Course of Graduate School of Science and Engineering, Master's Program
Applied Chemistry Course of Graduate School of Science and Engineering, Doctoral Program
Contact information
The inquiry by e-mail is 《here
Profile
2008-2013: Associate Professor, Hokkaido University, Japan (with Prof. M. KATO) Apr.-Sep. 2008: Visiting Researcher, University of Bath, UK (with Prof. F. MARKEN) 2002-2006: PRESTO Researcher, JST 2001-2008: Assistant Professor, Kyoto University, Japan (with Prof. S. KITAGAWA) 2001: Ph. D. Kyoto University, Japan (Prof. Susumu KITAGAWA) 1998: M. S. Tokyo Metropolitan University, Japan (Prof. Susumu KITAGAWA) 1995: B. S. Korea University, Japan
External link

Degree

  • 博士(工学) ( 京都大学 )

  • 修士(理学) ( 東京都立大学 )

Education

  • 2001.3
     

    Kyoto University   Graduate School, Division of Engineering   doctor course   completed

  • 1998.3
     

    Tokyo Metropolitan University   Graduate School, Division of Natural Science   master course   completed

  • 1995.3
     

    朝鮮大学校   理学部   化学科   graduated

  • 1991.3
     

    東京朝鮮中高級学校   graduated

Research History

  • 2013.4 -  

    中央大学理工学部 教授

  • 2008.11 - 2013.3

    北海道大学大学院理学研究院 准教授

  • 2008.12 -  

    北海道大学大学院理学研究院元素戦略教育研究センター 連携研究員

  • 2007.4 - 2008.10

    京都大学大学院工学研究科 助教

  • 2008.4 - 2008.9

    英国バース大学 客員研究員

  • 2007.6 -  

    理化学研究所播磨研究所放射光科学総合研究センター量子秩序研究グループ空間秩序研究チーム 客員研究員

  • 2001.4 - 2007.3

    京都大学大学院工学研究科 助手

  • 2002.11 - 2006.3

    科学技術振興機構戦略的創造研究推進事業さきがけ研究「秩序と物性」領域 研究員

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Professional Memberships

  • 分子科学会

  • 日本化学会

  • 錯体化学会

  • 日本液晶学会

Research Interests

  • 機能性分子材料、液晶、触媒

  • 液晶、錯体、触媒

Research Areas

  • Nanotechnology/Materials / Functional solid state chemistry  / 機能物性化学

  • Nanotechnology/Materials / Inorganic/coordination chemistry  / 無機化学

Papers

  • Experimental verification of double-four-ring-type aluminosilicate molecule as a single-source precursor for zeolite synthesis

    Akira Imaizumi, Yurika Ohnishi, Akinobu Nakada, Akinori Honda, Takeshi Matsumoto, Kenji Katayama, Ho-Chol Chang

    Bulletin of the Chemical Society of Japan   97 ( 6 )   2024.6

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    While a variety of functional zeolites have been synthesized using hydrothermal methods with conventional discrete Al and Si sources, control of the composition, structure, and function of the targeted zeolites often involves expensive and time-consuming trial-and-error approaches. Despite ongoing efforts to manipulate zeolite formation by adjusting Al and Si sources and reaction conditions, limited attention has been given to studies on zeolite synthesis using molecular precursors (MPs) with preorganized Al–O–Si bonds. Here, we demonstrate the synthesis of LTA-type zeolites using [TMA]4[Al4Si4O12(OH)8]·13H2O ([MP]; TMA = tetramethylammonium cation) with a double-four-ring (D4R)-type core structure, which is known to be a secondary building unit in the LTA-type zeolite, as a MP. Here, we demonstrate the successful synthesis of LTA-type zeolites using [MP] under hydrothermal conditions at 100 to 200 °C in the presence of 1 equiv. of NaOH or NaCl. Notably, when discrete Al and Si sources were used instead of [MP] under otherwise identical conditions (the same Si/Al ratio, Na+ content, and temperature), GIS-, SOD-, and FAU-type zeolites lacking the D4R structure were obtained in addition to the LTA-type zeolites.

    DOI: 10.1093/bulcsj/uoae060

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    Other Link: https://academic.oup.com/bcsj/article-pdf/97/6/uoae060/58356424/uoae060.pdf

  • Switching of the redox centers of a tris-2-mercaptophenolato chromium(<scp>iii</scp>) metalloligand by a guest metal ion

    Masanori Wakizaka, Takeshi Matsumoto, Ho-Chol Chang

    Dalton Transactions   52 ( 6 )   1538 - 1542   2023

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    Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    This work demonstrated the S-site binding tri-nuclear structure using a tris-type 2-mercaptophenolato metalloligand and switching of the redox centers.

    DOI: 10.1039/d2dt03502b

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  • Redox-active ligands for chemical, electrochemical, and photochemical molecular conversions Reviewed

    Akinobu Nakada, Takeshi Matsumoto, Ho-Chol Chang

    Coordination Chemistry Reviews   473   214804 - 214804   2022.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier {BV}  

    DOI: 10.1016/j.ccr.2022.214804

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  • Synthesis of Microporous Aluminosilicate by Direct Thermal Activation of Phenyl-Substituted Single-Source Aluminosilicate Molecular Precursors. International journal

    Akira Imaizumi, Akinobu Nakada, Takeshi Matsumoto, Toshiyuki Yokoi, Ho-Chol Chang

    Inorganic chemistry   61 ( 34 )   13481 - 13496   2022.8

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    The construction of aluminosilicates from versatile molecular precursors (MPs) represents a promising alternative strategy to conventional processes based on monomeric molecular or polymeric Al and Si sources. However, the use of MPs often suffers from drawbacks such as the decomposition of the core structures in the presence of solvents, acids, or bases. In this work, we demonstrate a simple thermal synthesis of porous aluminosilicates from single-source spiro-7-type MPs that consist of a tetrahedral Al atom and six Si atoms functionalized with 12 phenyl (Ph) groups, (C+)[Al{Ph2Si(OSiPh2O)2}2]- (C+[AlSi6]-; C+ = pyridinium cation (PyH+), Na+, K+, Rb+, or Cs+), without using a solvent or activator. Microporous aluminosilicates synthesized via the thermal treatment of C+[AlSi6]- under a 79% N2 + 21% O2 atmosphere exhibited extremely low carbon contents (0.10-1.28%), together with Si/Al ratios of 3.9-6.7 ± 0.2 and surface areas of 103.1-246.3 m2/g. The solid-state 27Al and 29Si MAS NMR spectra suggest that the obtained aluminosilicates with alkali cations retain a tetrahedral Al site derived from the spiro-7-type core structure. After a proton-exchange reaction, the aluminosilicates showed almost 1.5 times higher reactivity in the catalytic ring-opening of styrene oxide than the aluminosilicate before proton exchange due to the catalytically active OH site being predominantly bridged by tetrahedral Al and Si atoms. These results suggest that the present MP strategy is a promising method for the introduction of key structures into active inorganic materials.

    DOI: 10.1021/acs.inorgchem.2c02006

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  • Light-induced electron transfer/phase migration of a redox mediator for photocatalytic C–C coupling in a biphasic solution

    Ren Itagaki, Shin-ya Takizawa, Ho-Chol Chang, Akinobu Nakada

    Dalton Transactions   51 ( 24 )   9467 - 9476   2022

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    Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    Light-induced electron transfer and phase migration of ferrocene/ferrocenium suppress the backward charge recombination enabling efficient photocatalysis in a biphasic solution.

    DOI: 10.1039/d2dt01334g

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  • Tunable Synchronicity of Molecular Valence Tautomerism with Macroscopic Solid-Liquid Transition by Molecular Lattice Engineering

    Mayumi Chida, Satoru Takahashi, Ryunosuke Konishi, Takeshi Matsumoto, Akinobu Nakada, Masanori Wakizaka, Wataru Kosaka, Hitoshi Miyasaka, Ho-Chol Chang

    CHEMISTRY-A EUROPEAN JOURNAL   27 ( 66 )   16354 - 16366   2021.11

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    DOI: 10.1002/chem.202103090

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  • Functional Group-Directed Photochemical Reactions of Aromatic Alcohols, Amines, and Thiols Triggered by Excited-State Hydrogen Detachment: Additive-free Oligomerization, Disulfidation, and C(sp2)-H Carboxylation with CO2. International journal

    Kanae Abe, Akinobu Nakada, Takeshi Matsumoto, Daiki Uchijyo, Hirotoshi Mori, Ho-Chol Chang

    The Journal of organic chemistry   86 ( 1 )   959 - 969   2021.1

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    Exploring new types of photochemical reactions is of great interest in the field of synthetic chemistry. Although excited-state hydrogen detachment (ESHD) represents a promising prospective template for additive-free photochemical reactions, applications of ESHD in a synthetic context remains scarce. Herein, we demonstrate the expansion of this photochemical reaction toward oligomerization, disulfidation, and regioselective C(sp2)-H carboxylation of aromatic alcohols, thiols, and amines. In the absence of any radical initiators in tetrahydrofuran upon irradiation with UV light (λ = 280 or 300 nm) under an atmosphere of N2 or CO2, thiols and catechol afforded disulfides and oligomers, respectively, as main products. Especially, the photochemical disulfidation proceeded highly selectively with the NMR and quantum yields of up to 69 and 0.46%, respectively. In stark contrast, the photolysis of phenylenediamines and aminophenols results in photocarboxylation in the presence of CO2 (1 atm). p-Aminophenol was quantitatively carboxylated by photolysis for 17 h with a quantum yield of 0.45%. Furthermore, the photocarboxylation of phenylenediamines and aminophenols proceeds in a highly selective fashion on the aromatic C(sp2)-H bond next to a functional group, which is directed by the site-selective ESHD of the functional groups for the formation of aminyl and hydroxyl radicals.

    DOI: 10.1021/acs.joc.0c02456

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  • Excited-state hydrogen detachment from a tris-(o-phenylenediamine) iron(ii) complex in THF at room temperature. International journal

    Akinobu Nakada, Takuji Koike, Takeshi Matsumoto, Ho-Chol Chang

    Chemical communications (Cambridge, England)   56 ( 98 )   15414 - 15417   2020.12

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    We previously reported that a tris-(o-phenylenediamine) iron(ii) complex promotes photochemical H2 generation and C-H carboxylation of o-phenylenediamine without any additives under N2 and CO2 atmospheres, respectively, in tetrahydrofuran at room temperature. Herein, the key mechanistic process, namely, excited-state hydrogen detachment from the o-phenylendiamine moiety, is demonstrated under an N2 atmosphere.

    DOI: 10.1039/d0cc06219g

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  • Facile and selective synthesis of zeolites L and W from a single-source heptanuclear aluminosilicate precursor

    Akira Imaizumi, Akinobu Nakada, Takeshi Matsumoto, Ho-Chol Chang

    CRYSTENGCOMM   22 ( 35 )   5862 - 5870   2020.9

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    DOI: 10.1039/d0ce00546k

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  • Molecular Insights into the Ligand-Based Six-Proton- and Six-Electron-Transfer Processes Between Tris-ortho-Phenylenediamines and Tris-ortho-Benzoquinodiimines

    Takeshi Matsumoto, Risa Yamamoto, Masanori Wakizaka, Akinobu Nakada, Ho-Chol Chang

    Chemistry - A European Journal   26 ( 43 )   9609 - 9619   2020.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley-VCH Verlag  

    DOI: 10.1002/chem.202001873

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  • Impact of Group 10 Metals on the Solvent-Induced Disproportionation of o-Semiquinonato Complexes Reviewed

    Yamada, Shota, Matsumoto, Takeshi, Chang, Ho-Chol

    Chemistry – A European Journal   25 ( 35 )   8268 - 8278   2019

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    DOI: 10.1002/chem.201900172

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  • Direct Photochemical C–H Carboxylation of Aromatic Diamines with CO2 under Electron-Donor- and Base-free Conditions Reviewed

    Takeshi Matsumoto, Daiki Uchijyo, Takuji Koike, Ryoya Namiki, Ho-Chol Chang

    Sci. Rep.   8 ( 1 )   14623   2018.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1038/s41598-018-33060-3

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    Other Link: http://www.nature.com/articles/s41598-018-33060-3

  • Tuning the Electron Acceptability of the [Mo6S8] Cluster Core by Decorating It with Methyl Groups on the Face-Bridging µ3-Sulfides

    Takeshi Matsumoto, Ryoya Namiki, Ho-Chol Chang

    European Journal of Inorganic Chemistry   2018 ( 35 )   3900 - 3904   2018.9

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    DOI: 10.1002/ejic.201800587

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  • Tuning the Mesomorphism and Redox Response of Anionic-Ligand-Based Mixed-Valent Nickel(II) Complexes by Alkyl-Substituted Quaternary Ammonium Cations Reviewed

    Nakamura, Yuichi, Matsumoto, Takeshi, Sakazume, Yasutaka, Murata, Junnosuke, Chang, Ho-Chol

    Chemistry-a European Journal   24 ( 29 )   7398 - 7409   2018

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    DOI: 10.1002/chem.201706006

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  • Coordination Behavior of N, N'-Bis(diisopropylphosphinoacetyl)-o-phenylenediamide with Ni-II and Cu-I Ions Reviewed

    Takahiro Ito, Takeshi Matsumoto, Masanori Wakizaka, Ho-Chol Chang

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY   ( 29 )   3498 - 3507   2017.8

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    DOI: 10.1002/ejic.201700433

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  • A Coordination Network with Ligand-Centered Redox Activity Based on facial-[Cr-III(2-mercaptophenolato)(3)](3-) Metalloligands Reviewed

    Masanori Wakizaka, Takeshi Matsumoto, Atsushi Kobayashi, Masako Kato, Ho-Chol Chang

    CHEMISTRY-A EUROPEAN JOURNAL   23 ( 41 )   9919 - 9925   2017.7

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    DOI: 10.1002/chem.201701613

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    Other Link: http://orcid.org/0000-0002-6932-9758

  • Structural and Spectroscopic Studies on the Interactions of ortho-Phenylenediamine and Li+, Na+, Mg2+, or Ca2+ Ions Reviewed

    Takeshi Matsumoto, Junki Ishii, Masanori Wakizaka, Ho-Chol Chang

    CHEMISTRY LETTERS   46 ( 2 )   232 - 235   2017.2

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    DOI: 10.1246/cl.160997

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  • Dehydrogenation of anhydrous methanol at room temperature by o-aminophenol-based photocatalysts Reviewed

    Masanori Wakizaka, Takeshi Matsumoto, Ryota Tanaka, Ho-Chol Chang

    NATURE COMMUNICATIONS   7   2016.7

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    DOI: 10.1038/ncomms12333

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  • Shape-memory Platinum(II) Complexes: Intelligent Vapor-History Sensor with ON-OFF Switching Function Reviewed

    Y. Shigeta, A. Kobayashi, T. Ohba, M. Yoshida, T. Matsumoto, H.-C. Chang, M. Kato

    Chem. Eur. J.   22 ( 8 )   2682 - 2690   2016

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley-Blackwell  

    DOI: 10.1002/chem.201503247

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  • Highly polar solvent-induced disproportionation of a cationic Pt(II)-diimine complex containing an o-semiquinonato Reviewed

    Shota Yamada, Takeshi Matsumoto, Masanori Wakizaka, Ho-Chol Chang

    DALTON TRANSACTIONS   45 ( 12 )   4974 - 4977   2016

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    DOI: 10.1039/c6dt00487c

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  • Syntheses and Structures of Molybdenum-oxo Complexes Prepared by the Reactions of [MoII2(OAc)4] with tert-Butyl- or Bromo-substituted Catechols Reviewed

    T. Matsumoto, H.Yano, M. Wakizaka, A. Kobayashi, M. Kato, H.-C. Chang

    Bull. Chem. Soc. Jpn.   88 ( 1 )   74 - 83   2015

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Chemical Society of Japan  

    DOI: 10.1246/bcsj.20140208

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  • PB26 Electrochemical Transformation of Metallomesogens Possessing Catecholato or Benzenedithiolato

    SAKAZUME Yasutaka, WAKIZAKA Masanori, MATSUMOTO Takeshi, CHANG Ho-Chol

    Proceedings of Japanese Liquid Crystal Society Annual meeting   2015   _PB26 - 1_-_PB26-2   2015

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    Redox-active liquid crystals that have both liquid crystalline and redox properties are expected to give new and attractive electronic devises controlled by electrochemical methods at ambient conditions. We have reported the design and properties of Pt(II) metallomegens possessing redox-active catecholato or benzenedithiolato and long alkyl chain-substituted bipyridine ligands. Especially, metallomesogen possessing 3,5-t-butylcatecholato shows direct electrochemical redox responses and electrochemically -induced transformation between columnar liquid crystal and isotropic ionic liquid phases. In this work, the effects of coordinating atoms, the position of substituents, temperature, and electrolytes on electrochemical property of metallomesogens will be presented.

    DOI: 10.11538/ekitou.2015.0__PB26

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  • Vapochromic Luminescence and Flexibility Control of Porous Coordination Polymers by Substitution of Luminescent Multinuclear Cu(I)-cluster Nodes Reviewed

    T. Hayashi, A. Kobayashi, H. Ohara, M. Yoshida, T. Matsumoto, H.-C. Chang, M. Kato

    Inorg. Chem.   54 ( 18 )   8905 - 8913   2015

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.inorgchem.5b00578

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  • Interactions Between the Trianionic Ligand-centred Redox-active Metalloligand [CrIII(perfluorocatecholato)3]3– and Guest Metal Ions Reviewed

    M. Wakizaka, T. Matsumoto, A. Kobayashi, M. Kato, H.-C. Chang

    Dalton Trans.   44 ( 32 )   14304 - 14314   2015

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    <p>The redox behavior of redox-active metalloligand (RML), [CrIII(F4Cat)3]3− (F4Cat: perfluorocatecholato), responsible for interaction with guest metal ions in solution are systematically demonstrated.</p>

    DOI: 10.1039/c5dt01963j

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  • Systematic Syntheses and Metalloligand-Doping of Flexible Porous Coordination Polymers Composed of a Co(III)-metalloligand Reviewed

    A. Kobayashi, Y. Suzuki, T. Ohba, T. Ogawa, T. Matsumoto, S. Noro, H.-C. Chang, M. Kato

    Inorg. Chem.   54 ( 6 )   2522 - 2535   2015

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    DOI: 10.1021/ic5021302

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  • Immobilization of a Redox-active Catecholato Pt(II) Complex on an Indium-doped Tin Oxide Electrode via Phosphonate Anchors Reviewed

    Hirotaka Honda, Takeshi Matsumoto, Ryo Tamura, Katsuhiko Kanaizuka, Atsushi Kobayashi, Masako Kato, Masa-aki Haga, Ho-Chol Chang

    CHEMISTRY LETTERS   43 ( 8 )   1189 - 1191   2014.8

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    DOI: 10.1246/cl.140235

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  • Synthesis and Vapor-adsorption Behavior of a Flexible Porous Coordination Polymer Built from a Bis(bipyridyl)-Cu(I) Metalloligand Reviewed

    Atsushi Kobayashi, Akira Sugiyama, Tadashi Ohba, Yui Suzuki, Ho-Chol Chang, Masako Kato

    CHEMISTRY LETTERS   43 ( 7 )   1070 - 1072   2014.7

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    DOI: 10.1246/cl.140249

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  • Spontaneous Construction of Nanoneedles Using Ruthenium Complex-conjugated Porphyrins on Substrates Reviewed

    T. Togashi, A. Izumi, H. Kon, K. Kanaizuka, M .Ishizaki, R. Miyake, H.C. Chang, M. Haga, M. Sakamoto, M. Kurihara

    Chem. Lett.   43   1201 - 1203   2014.5

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  • Photo-induced dimerization reaction coupled with oxygenation of a platinum(II)-hydrazone complex Reviewed

    A. Kobayashi, D. Yamamoto, H. Horike, K. Sawaguchi, T. Matsumoto, K. Nakajima, H.-C. Chang, M. Kato

    Inorg. Chem.   ( 53 )   2014.2

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  • Flexible Coordination Polymers Composed of Luminescent Ru(II)-Metalloligands: Importance of Position of Coordination Site in Metalloligands Reviewed

    A. Kobayashi, T. Ohba, E. Saitoh, Y. Suzuki, S.-i. Noro, H.-C. Chang, M. Kato

    Inorg. Chem.   ( 53 )   2014.2

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  • Hysteretic vapour response of a heterodinuclear platinum(II)-copper(II) complex derived from the dimer-of-dimer motif and the guest-absorbing site Reviewed

    Tadashi Ohba, Atsushi Kobayashi, Ho-Chol Chang, Takahiko Kouyama, Tatsuhisa Kato, Masako Kato

    DALTON TRANSACTIONS   43 ( 20 )   7514 - 7521   2014

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    DOI: 10.1039/c4dt00316k

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  • Photo- and Vapor-Controlled Luminescence of Rhombic Dicopper(I) Complexes Containing Dimethyl Sulfoxide Reviewed

    Atsushi Kobayashi, Kahori Komatsu, Hiroki Ohara, Waka Kamada, Yuko Chishina, Kiyoshi Tsuge, Ho-Chol Chang, Masako Kato

    INORGANIC CHEMISTRY   52 ( 22 )   13188 - 13198   2013.11

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    DOI: 10.1021/ic402104q

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  • Self-association and Columnar Liquid Crystalline Phase of Cationic Alkyl-substituted-Bipyridine Benzenedithiolato Gold(III) Complexes Reviewed

    T. Ogawa, M. Sakamoto, H. Honda, T. Matsumoto, A. Kobayashi, M. Kato, H.-C. Chang

    Dalton. Trans.   ( 42 )   2013.7

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  • Nonprecious-metal-assisted photochemical hydrogen production from ortho-phenylenediamine Reviewed

    Takeshi Matsumoto, Ho-Chol Chang, Masanori Wakizaka, Sho Ueno, Atsushi Kobayashi, Akira Nakayama, Tetsuya Taketsugu, Masako Kato

    Journal of the American Chemical Society   135 ( 23 )   8646 - 8654   2013.6

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    DOI: 10.1021/ja4025116

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  • Integration of Alkyl-Substituted Bipyridyl Benzenedithiolato Platinum(II) Complexes with Cadmium(II) Ion via Selective Dative Bond Formation Reviewed

    Hirotaka Honda, Takeshi Matsumoto, Misaki Sakamoto, Atsushi Kobayashi, Ho-Chol Chang, Masako Kato

    INORGANIC CHEMISTRY   52 ( 8 )   4324 - 4334   2013.4

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    DOI: 10.1021/ic302352k

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    Other Link: http://orcid.org/0000-0002-6932-9758

  • Selective Dative Bond Formation of Bipyridyl Benzenedithiolato Platinum(II) Complexes with Cadmium(II) Ion Reviewed

    Hirotaka Honda, Takeshi Matsumoto, Misaki Sakatomo, Atsushi Kobayashi, Ho-Chol Chang, Masako Kato

    Inorganic Chemistry   ( 52 )   4324 - 4334   2013.3

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  • Vapour and mechanically induced chromic behaviour of platinum complexes with a dimer-of-dimer motif and the effects of hetero metal ions Reviewed

    Tadashi Ohba, Aatsushi Kobayashi, Ho-Chol Chang, Masako Kato

    Dalton Transactions   ( 42 )   5490 - 5499   2013.2

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  • Vapour and mechanically induced chromic behaviour of platinum complexes with a dimer-of-dimer motif and the effects of heterometal ions Reviewed

    Tadashi Ohba, Atsushi Kobayashi, Ho-Chol Chang, Masako Kato

    DALTON TRANSACTIONS   42 ( 15 )   5514 - 5523   2013

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    DOI: 10.1039/c3dt33100h

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    Other Link: http://orcid.org/0000-0002-6932-9758

  • Synchronic Transformation of Molecular States and Macroscopic Phases in Valence Tautomeric Complexes Reviewed

    H.-C. Chang, D. Kiriya

    Eur. J. Inorg. Chem.   130   642 - 652   2012.12

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  • Vapor-Controlled Linkage Isomerization of a Vapochromic Bis(thiocyanato)platinum(II) Complex: New External Stimuli To Control Isomerization Behavior Reviewed

    Atsushi Kobayashi, Yuki Fukuzawa, Ho-Chol Chang, Masako Kato

    INORGANIC CHEMISTRY   51 ( 14 )   7508 - 7519   2012.7

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    DOI: 10.1021/ic202734f

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  • Coordination site-dependent cation binding and multi-responsible redox properties of Janus-head metalloligand, [Mo-V(1,2-mercaptophenolato)(3)] Reviewed

    Takeshi Matsumoto, Masanori Wakizaka, Hirokazu Yano, Atsushi Kobayashi, Ho-Chol Chang, Masako Kato

    DALTON TRANSACTIONS   41 ( 27 )   8303 - 8315   2012

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    DOI: 10.1039/c2dt30178d

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  • Terpyridine platinum(II) complexes containing triazine di- or tri-thiolate bridges: structures, luminescence, electrochemistry, and aggregation Reviewed

    Hua-Xin Zhang, Masako Kato, Yoichi Sasaki, Tadashi Ohba, Hiroto Ito, Atsushi Kobayashi, Ho-Chol Chang, Kohei Uosaki

    DALTON TRANSACTIONS   41 ( 37 )   11497 - 11506   2012

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    DOI: 10.1039/c2dt30997a

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  • Systematic structural control of multichromic platinum(II)-diimine complexes ranging from ionic solid to coordination polymer Reviewed

    Atsushi Kobayashi, Hirofumi Hara, Tsubasa Yonemura, Ho-Chol Chang, Masako Kato

    DALTON TRANSACTIONS   41 ( 6 )   1878 - 1888   2012

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    DOI: 10.1039/c1dt11155h

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  • ON-OFF Switching of the Solvatochromic Behavior of a Copper(II)-Hydrazone Complex Induced by Protonation/Deprotonation Reviewed

    Mee Chang, Atsushi Kobayashi, Ho-Chol Chang, Kiyohiko Nakajima, Masako Kato

    CHEMISTRY LETTERS   40 ( 12 )   1335 - 1337   2011.12

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    DOI: 10.1246/cl.2011.1335

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  • Dimensionality Control of Vapochromic Hydrogen-Bonded Proton-Transfer Assemblies Composed of a Bis(hydrazone)iron(II) Complex Reviewed

    Mee Chang, Atsushi Kobayashi, Kiyohiko Nakajima, Ho-Chol Chang, Masako Kato

    INORGANIC CHEMISTRY   50 ( 17 )   8308 - 8317   2011.9

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    DOI: 10.1021/ic2008396

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  • Chromic Behaviors of Hexagonal Columnar Liquid Crystalline Platinum Complexes with Catecholato, 2-Thiophenolato, and Benzenedithiolato Reviewed

    Ho-Chol Chang, Kazuki Komasaka, Keisuke Kishida, Tomoki Shiozaki, Takeshi Ohmori, Takeshi Matsumoto, Atsushi Kobayashi, Masako Kato, Susumu Kitagawa

    INORGANIC CHEMISTRY   50 ( 10 )   4279 - 4288   2011.5

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    DOI: 10.1021/ic102123n

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  • Metal-dependent and Redox-selective Coordination Behaviors of Metalloligand [MoV(1,2-benzenedithiolato)3]– with CuI/AgI ions Reviewed

    T. Matsumoto

    Inorg. Chem.   50 ( 7 )   2859 - 2869   2011.4

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    DOI: 10.1021/ic102070c

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  • Ln-Co-Based Rock-Salt-Type Porous Coordination Polymers: Vapor Response Controlled by Changing the Lanthanide Ion Reviewed

    Atsushi Kobayashi, Yui Suzuki, Tadashi Ohba, Shin-ichiro Noro, Ho-Chol Chang, Masako Kato

    INORGANIC CHEMISTRY   50 ( 6 )   2061 - 2063   2011.3

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    DOI: 10.1021/ic102361d

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  • Structures and Luminescence Properties of Cyclometalated Dinuclear Platinum(II) Complexes Bridged by Pyridinethiolate Ions Reviewed

    Rie Aoki, Atsushi Kobayashi, Ho-Chol Chang, Masako Kato

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   84 ( 2 )   218 - 225   2011.2

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    DOI: 10.1246/bcsj.20100304

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  • Synthesis, structure and photophysical properties of a flavin-based platinum(II) complex Reviewed

    Atsushi Kobayashi, Korin Ohbayashi, Rie Aoki, Ho-Chol Chang, Masako Kato

    DALTON TRANSACTIONS   40 ( 14 )   3484 - 3489   2011

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    DOI: 10.1039/c0dt01139h

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  • Vapour-adsorption and chromic behaviours of luminescent coordination polymers composed of a Pt(II)-diimine metalloligand and alkaline-earth metal ions Reviewed

    Hirofumi Hara, Atsushi Kobayashi, Shin-ichiro Noro, Ho-Chol Chang, Masako Kato

    DALTON TRANSACTIONS   40 ( 31 )   8012 - 8018   2011

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    DOI: 10.1039/c1dt10518c

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  • Acid-Base Behavior of Substituted Hydrazone Complexes Controlled by the Coordination Geometry Reviewed

    Mee Chang, Hiroyuki Horiki, Kiyohiko Nakajima, Atsushi Kobayashi, Ho-Chol Chang, Masako Kato

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   83 ( 8 )   905 - 910   2010.8

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    DOI: 10.1246/bcsj.20100065

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  • Modulable cooperativity in a valence tautomeric complex functionalized with branched alkyl chains Reviewed

    Daisuke Kiriya, Kohei Nakamura, Susumu Kitagawa, Ho-Chol Chang

    CHEMICAL COMMUNICATIONS   46 ( 21 )   3729 - 3731   2010

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    DOI: 10.1039/c001568g

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  • Voltammetric Antioxidant Analysis in Mineral Oil Samples Immobilized into Boron-Doped Diamond Micropore Array Electrodes Reviewed

    Xiaohang Zhang, Christopher A. Paddon, Yohan Chan, Philip C. Bulman-Page, Paul S. Fordred, Steven D. Bull, Ho-Chol Chang, Nadeem Rizvi, Frank Marken

    ELECTROANALYSIS   21 ( 12 )   1341 - 1347   2009.6

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    DOI: 10.1002/elan.200904590

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  • Assembled Functional Chemistry of Redox-active Complexes Reviewed

    H.-C. Chang

    Bull. Jpn. Soc. Coord. Chem.   53   24 - 32   2009.5

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    The present contribution reviews the synthesis and properties of complexes including redox-active dioxolene ligands as well as its analogues, diiminosemiquinonato, and dithiolene ligands. This review first summarizes the structural and electronic features of new molecular complexes as a building block for constructing electronically labile molecular assemblies. Ligand-based mixed valence (LBMV) state has been realized both in mononuclear chromium and pentanuclear cobalt complexes. Second topic will be on the construction of molecular assemblies integrated by intermolecular stacking or charge-transfer interactions, clusterization, and ligand-unsupported M-M bonds. The formation of a thin film which acts as an active layer of a field-effect transistor will also be described. Final attention is drawn to the use of the redox-active complexes for the construction of stimuli-responsive molecular assemblies. The review will demonstrate recent developments of molecular assemblies that show macroscopic phase transition or phase transformation triggered by intramolecular electron transfer or redox reaction in solid, liquid, and liquid crystals.

    DOI: 10.4019/bjscc.53.24

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    Other Link: https://jlc.jst.go.jp/DN/JALC/00337206410?from=CiNii

  • Polymorph-Dependent Molecular Valence Tautomerism Synchronized with Crystal-Melt Phase Transitions Reviewed

    Daisuke Kiriya, Ho-Chol Chang, Kohei Nakamura, Daisuke Tanaka, Ko Yoneda, Susumu Kitagawa

    CHEMISTRY OF MATERIALS   21 ( 9 )   1980 - 1988   2009.5

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    DOI: 10.1021/cm900543r

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  • Allosteric binding of amino alcohols and diamines by dimeric zinc biladienone Reviewed

    Tomofumi Shimizu, Naomi Asano, Tadashi Mizutani, Ho-Chol Chang, Susumu Kitagawa

    TETRAHEDRON LETTERS   50 ( 5 )   536 - 539   2009.2

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    DOI: 10.1016/j.tetlet.2008.11.057

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  • Bimodal three-membered valence tautomerism of an alkyl chain-functionalized manganese dioxolene complex Reviewed

    Daisuke Kiriya, Kohei Nakamura, Ho-Chol Chang, Susumu Kitagawa

    CHEMICAL COMMUNICATIONS   ( 27 )   4085 - 4087   2009

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    DOI: 10.1039/b901939a

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  • Dynamic torsional motion of a diruthenium complex with four homo-catecholates and first synthesis of a diruthenium complex with mixed-catecholates Reviewed

    Ho-Chol Chang, Katsunori Mochizuki, Susumu Kitagawa

    JOURNAL OF MOLECULAR STRUCTURE   890 ( 1-3 )   303 - 308   2008.11

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    DOI: 10.1016/j.molstruc.2008.05.027

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  • Ambipolar, Single-Component, Metal-Organic Thin-Film Transistors with High and Balanced, Hole and Electron Mobilities Reviewed

    S.-i. Noro

    Adv. Mat.   20 ( 18 )   3399 - 3403   2008.9

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  • Molecule-based valence tautomeric bistability synchronized with a macroscopic crystal-melt phase transition Reviewed

    Daisuke Kiriya, Ho-Chol Chang, Susumu Kitagawa

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   130 ( 16 )   5515 - 5522   2008.4

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    DOI: 10.1021/ja711268u

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  • A redox-active columnar metallomesogen and its cyclic voltammetric responses Reviewed

    Ho-Chol Chang, Tomoki Shiozaki, Akiko Kamata, Keisuke Kishida, Takeshi Ohmori, Daisuke Kiriya, Takae Yamauchi, Hirotaka Furukawa, Susumu Kitagawa

    JOURNAL OF MATERIALS CHEMISTRY   17 ( 39 )   4136 - 4138   2007

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    DOI: 10.1039/b709103f

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  • Structural and spectroscopic characterization of a diruthenium o-dioxolene complex possessing a singly occupied molecular orbital delocalized over the entire molecule, [Ru-2(3,6-DTBDiox)(4)](-) Reviewed

    K Mochizuki, T Kawamura, HC Chang, S Kitagawa

    INORGANIC CHEMISTRY   45 ( 10 )   3990 - 3997   2006.5

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    DOI: 10.1021/ic052180p

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  • Tuning of the spin states in trinuclear cobalt compounds of pyridazine by the second simple bridging ligand Reviewed

    T Yi, C Ho-Chol, S Gao, S Kitagawa

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY   ( 7 )   1381 - 1387   2006.4

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    DOI: 10.1002/ejic.200500741

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  • Polytypic phase transition in alkyl chain-functionalized valence tautomeric complexes Reviewed

    D Kiriya, HC Chang, A Kamata, S Kitagawa

    DALTON TRANSACTIONS   ( 11 )   1377 - 1382   2006.3

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    DOI: 10.1039/b513807h

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  • Redox-active columnar metallomesogens and their electrochemical responces

    Chang Ho-Chol, Shiozaki Tomoki, Ohmori Takeshi, Kishida Keisuke, Kitagawa Susumu

    Proceedings of Japanese Liquid Crystal Society Annual meeting   2006   97 - 97   2006

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    A first example of redox-active metallomesogen with catechol was designed using the branched alkyl chains. A hexagonal columnar ordered phase (Colho) is fairly stable over 161 degeeC from 31 degreeC. The direct electrochemical study on the Colho phase illustrates that the redox process occurred at a three-phase junction of the Colho, the electrode, and the electrolyte solution.

    DOI: 10.11538/ekitou.2006.0.97.0

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  • Synthesis, structures, and magnetic properties of the copper(II), cobalt(II), and manganese(II) complexes with 9-acridinecarboxylate and 4-quinolinecarboxylate ligands Reviewed

    XH Bu, ML Tong, YB Xie, Li, JR, HC Chang, S Kitagawa, J Ribas

    INORGANIC CHEMISTRY   44 ( 26 )   9837 - 9846   2005.12

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    DOI: 10.1021/ic050886d

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  • Effect of countercations on the structural isomerization of a dianionic diruthenium complex with a ligand-unsupported Ru-Ru bond Reviewed

    K Mochizuki, HC Chang, T Kawamura, S Kitagawa

    CHEMISTRY LETTERS   34 ( 12 )   1662 - 1663   2005.12

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  • Metal-organic thin-film transistor (MOTFT) based on bis(o-diiminobenzosemiquinonate) nickel(II) complex Reviewed

    S Noro, HC Chang, T Takenobu, Y Murayama, T Kanbara, T Aoyama, T Sassa, T Wada, D Tanaka, S Kitagawa, Y Iwasa, T Akutagawa, T Nakamura

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   127 ( 28 )   10012 - 10013   2005.7

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    DOI: 10.1021/ja052663s

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  • Formation of 3D networks by H-bonding from novel trinuclear or 1D chain complexes of zinc(II) and cadmium(II) with isonicotinic acid analogues and the effects of pi-pi stacking Reviewed

    XH Bu, ML Tong, Li, JR, HC Chang, JL Li, S Kitagawa

    CRYSTENGCOMM   7 ( 67 )   411 - 416   2005.6

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    DOI: 10.1039/b506721a

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  • Effects of countercations on the structures and redox and spectroscopic properties of diruthenium catecholate complexes with ligand-unsupported Ru-Ru bonds Reviewed

    HC Chang, K Mochizuki, S Kitagawa

    INORGANIC CHEMISTRY   44 ( 11 )   3810 - 3817   2005.5

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    DOI: 10.1021/ic048250u

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  • Substituent-directed structural and physicochemical controls of diruthenium catecholate complexes with ligand-unsupported Ru-Ru bonds Reviewed

    HC Chang, K Mochizuki, S Kitagawa

    INORGANIC CHEMISTRY   44 ( 11 )   3799 - 3809   2005.5

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    DOI: 10.1021/ic048251m

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  • Formation of a ligand-based mixed-valence cluster triggered by dehydration condensation of semiquinonates with o-phenylenediamines Reviewed

    HC Chang, N Nishida, S Kitagawa

    CHEMISTRY LETTERS   34 ( 3 )   402 - 403   2005.3

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  • Porous lanthanide-organic framework with zeolite-like topology Reviewed

    TK Maji, G Mostafa, HC Chang, S Kitagawa

    CHEMICAL COMMUNICATIONS   ( 19 )   2436 - 2438   2005

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    DOI: 10.1039/b500971e

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  • Effect of the metal-assisted assembling mode on the redox states of hexaazatriphenylene hexacarbonitrile Reviewed

    S Furukawa, T Okubo, S Masaoka, D Tanaka, HC Chang, S Kitagawa

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   44 ( 18 )   2700 - 2704   2005

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    DOI: 10.1002/anie.200462962

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  • A facile and versatile preparation of bilindiones and biladienones from tetraarylporphyrins Reviewed

    T Yamauchi, T Mizutani, K Wada, S Horii, H Furukawa, S Masaoka, HC Chang, S Kitagawa

    CHEMICAL COMMUNICATIONS   ( 10 )   1309 - 1311   2005

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    DOI: 10.1039/b414299c

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  • Cover Picture: Expanding and Shrinking Porous Modulation Based on Pillared-Layer Coordination Polymers Showing Selective Guest Adsorption (Angew. Chem. Int. Ed. 25/2004)

    Tapas Kumar Maji, Kazuhiro Uemura, Ho-Chol Chang, Ryotaro Matsuda, Susumu Kitagawa

    Angewandte Chemie International Edition   43 ( 25 )   3205 - 3205   2004.6

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    DOI: 10.1002/anie.200490079

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  • Metal-complex assemblies constructed from the flexible hinge-like ligand H(2)bhnq: Structural versatility and dynamic behavior in the solid state Reviewed

    K Yamada, S Yagishita, H Tanaka, K Tohyama, K Adachi, S Kaizaki, H Kumagai, K Inoue, R Kitaura, HC Chang, S Kitagawa, S Kawata

    CHEMISTRY-A EUROPEAN JOURNAL   10 ( 11 )   2648 - 2660   2004.6

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    DOI: 10.1002/chem.200305640

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  • Magnetism of a one-dimensional array of oxygen in a micro-porous metal-organic solid Reviewed

    A. Matsuo, T. C. Kobayashi, M. Suzuki, K. Kindo, R. Kitaura, R. Matsuda, H. -C. Chang, S. Kitagawa

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   272 ( 272-276 )   E643 - E645   2004.5

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    DOI: 10.1016/j.jmmm.2003.11.327

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  • Temperature-controlled hydrothermal synthesis of a 2D ferromagnetic coordination bilayered polymer and a novel 3D network with inorganic CO3(OH)(2) ferrimagnetic chains Reviewed

    ML Tong, S Kitagawa, HC Chang, M Ohba

    CHEMICAL COMMUNICATIONS   ( 4 )   418 - 419   2004.2

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    DOI: 10.1039/b312058a

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  • Third-order nonlinear optical properties of soluble Cr(III)-dioxolene complexes Reviewed

    S Noro, T Sassa, T Aoyama, HC Chang, S Kitagawa, T Wada

    LINEAR AND NONLINEAR OPTICS OF ORGANIC MATERIALS IV   5517 ( 5571 )   12 - 19   2004

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    DOI: 10.1117/12.559114

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  • Expanding and shrinking porous modulation based on pillared-layer coordination polymers showing selective guest adsorption Reviewed

    TK Maji, K Uemura, HC Chang, R Matsuda, S Kitagawa

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   43 ( 25 )   3269 - 3272   2004

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    DOI: 10.1002/anie.200453923

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  • A neutral 3D copper coordination polymer showing 1D open channels and the first interpenetrating NbO-type network Reviewed

    XH Bu, ML Tong, HC Chang, S Kitagawa, Batten, SR

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   43 ( 2 )   192 - 195   2004

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    DOI: 10.1002/anie.200352024

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  • Syntheses and crystal structures of three one-dimensional copper(II) complexes constructed by salicylate and 4,4 '-bipyridine: ladder, zig-zag, and linear polymeric assembly Reviewed

    LG Zhu, S Kitagawa, H Miyasaka, HC Chang

    INORGANICA CHIMICA ACTA   355 ( 355 )   121 - 126   2003.11

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    DOI: 10.1016/S0020-1693(03)00254-8

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  • Rational design of a ferromagnetic trinuclear copper(II) complex with a novel in-situ synthesised metalloligand Reviewed

    ML Tong, YM Wu, YX Tong, XM Chen, HC Chang, S Kitagawa

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY   ( 13 )   2385 - 2388   2003.7

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    DOI: 10.1002/ejic.200300197

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  • Cation-templated construction of three-dimensional alpha-Po cubic-type [M(dca)(3)](-) networks. Syntheses, structures and magnetic properties of A[M(dca)(3)] (dca = dicyanamide; for A = benzyltributylammonium, M = Mn2+, Co2+; for A = benzyltriethylammonium, M = Mn2+, Fe2+) Reviewed

    ML Tong, J Ru, YM Wu, XM Chen, HC Chang, K Mochizuki, S Kitagawa

    NEW JOURNAL OF CHEMISTRY   27 ( 5 )   779 - 782   2003

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    DOI: 10.1039/b300760j

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  • PB16 Syntheses of Novel Transition Metal Complexes toward Redox-active Metallomesogens

    CHANG Ho-Chol, KAMATA Akiko, FURUKAWA Hirotaka, MOCHIZUKI Katsunori, KITAGAWA Susumu

    Proceedings of Japanese Liquid Crystal Society Annual meeting   2003   389 - 390   2003

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    Novel mono/trinuclear palladium/platinum complexes have been synthesized and characterized by X-ray diffraction, electrochemical, and thermogravimetric analyses. All the complexes possess catecholate derivatives, which have been known to show rich redox activity. Almost complexes show multi-step thermal phase transitions, and each transition was studied by XRPD and DSC measurements. Interestingly, the complexes demonstrate redox activity based on the electronically labile nature of the catecholate derivatives. The results obtained in this study clearly suggest that the complexes would be candidates for redox-active metallomesogens.

    DOI: 10.11538/ekitou.2003.0_389

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  • A novel three-dimensional coordination polymer constructed with mixed-valence dimeric copper(I,II) units Reviewed

    ML Tong, LJ Li, K Mochizuki, HC Chang, XM Chen, Y Li, S Kitagawa

    CHEMICAL COMMUNICATIONS   ( 3 )   428 - 429   2003

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    DOI: 10.1039/b210914j

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  • Formation of a one-dimensional array of oxygen in a microporous metal-organic solid Reviewed

    R Kitaura, S Kitagawa, Y Kubota, TC Kobayashi, K Kindo, Y Mita, A Matsuo, M Kobayashi, HC Chang, TC Ozawa, M Suzuki, M Sakata, M Takata

    SCIENCE   298 ( 5602 )   2358 - 2361   2002.12

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  • Pseudo-polyrotaxane and beta-sheet layer-based three-dimensional coordination polymers constructed with silver salts and flexible pyridyl-type ligands Reviewed

    ML Tong, YM Wu, J Ru, XM Chen, HC Chang, S Kitagawa

    INORGANIC CHEMISTRY   41 ( 19 )   4846 - 4848   2002.9

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    DOI: 10.1021/ic0256922

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  • Crystal structure and 2-D stacking network of [Cu(Hsal)(2) (py)(2)](n) Reviewed

    LG Zhu, GQ Cai, S Kitagawa, HC Chang

    CHINESE JOURNAL OF INORGANIC CHEMISTRY   18 ( 9 )   911 - 914   2002.9

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  • Synthesis and ligand-based mixed valency of cis- and trans-Cr-III(X(4)SQ)(X(4)Cat)(L)(n) (X = Cl and Br, n=1 or 2) complexes: Effects of solvent media on intramolecular charge distribution and ligand dissociation of Cr-III(X(4)SQ)(3) Reviewed

    HC Chang, K Mochizuki, S Kitagawa

    INORGANIC CHEMISTRY   41 ( 17 )   4444 - 4452   2002.8

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    DOI: 10.1021/ic025643p

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  • Novel flexible frameworks of porous cobalt(III) coordination polymers that show selective guest adsorption based on the switching of hydrogen-bond pairs of amide groups Reviewed

    K Uemura, S Kitagawa, M Kondo, K Fukui, R Kitaura, HC Chang, T Mizutani

    CHEMISTRY-A EUROPEAN JOURNAL   8 ( 16 )   3586 - 3600   2002.8

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  • Syntheses and crystal structures of mononuclear rhodium hydrido complexes from the reactions of [Rh(H)(2)(PPh3)(2)(EtOH)(2)]ClO4 with various nitrogen ligands Reviewed

    XY Yu, M Maekawa, T Morita, HC Chang, S Kitagawa, GX Jin

    POLYHEDRON   21 ( 16 )   1613 - 1620   2002.7

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  • Out-of-Plane Dimers of Mn(III) Quadridentate Schiff-Base Complexes with Saltmen2- and Naphtmen2- Ligands: Structure Analysis and Ferromagnetic Exchange Reviewed

    H. Miyasaka

    J. Chem. Soc. Dalton Trans.   ( 7 )   1528 - 1534   2002.4

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  • Solvent-dependent formation of di- and trinuclear rhodiurn and iridium complexes bridged by N,N '-donor ligands Reviewed

    XY Yu, M Maekawa, T Morita, HC Chang, S Kitagawa, GX Jin

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   75 ( 2 )   267 - 275   2002.2

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  • New one-dimensional chain compounds of [M (pdz) Cl-2](n)(M=Cu(II), Fe(II), Mn(II); pdz = pyridazine and their magnetic properties Reviewed

    T Yi, HC Chang, S Kitagawa

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS   376 ( 376 )   283 - 288   2002

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  • An unprecedented mixed-charged state in a supramolecular assembly of ligand-based mixed-valence redox isomers (ET center dot+)(3)[Cr-III-(Cl(4)SQ)(2)(Cl(4)Cat)](-)[Cr-III(Cl(4)SQ)(Cl(4)Cat)(2)](2-) Reviewed

    HC Chang, S Kitagawa

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   41 ( 1 )   130 - 133   2002

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  • X-ray crystal structures and two-dimensional pi ... pi stacking interaction of Cr-III(X(4)SQ)(3) center dot 4C(6)H(6) (X=Cl and Br) Reviewed

    HC Chang, Susumukitagawa

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS   376 ( 376 )   275 - 282   2002

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  • Syntheses, structures, and physicochemical properties of diruthenium compounds of tetrachlorocatecholate with metal-metal bonded Ru3+(mu-OR)(2)Ru3+ and Ru3.5+(mu-OR)(2)Ru3.5+ cores (R = CH3 and C2H5) Reviewed

    H Miyasaka, HC Chang, K Mochizuki, S Kitagawa

    INORGANIC CHEMISTRY   40 ( 14 )   3544 - 3554   2001.7

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    DOI: 10.1021/ic0010252

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  • New molecular assemblies of redox isomers, [Cr-III(X(4)SQ)(3-n)(X(4)Cat)(n)](-n) (X = Cl and Br; n=0, 1, and 2), with metallocenium cations, [(MCp2)-Cp-III](+) (M = Co and Fe): X-ray crystal structures and physical properties Reviewed

    HC Chang, H Miyasaka, S Kitagawa

    INORGANIC CHEMISTRY   40 ( 1 )   146 - 156   2001.1

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  • A New Class of Cyclic Hexamer: [Co6L6](24-) (H6L = hexaazatriphenylene hexacarboxylic acid) Reviewed

    S Masaoka, S Furukawa, HC Chang, T Mizutani, S Kitagawa

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   40 ( 20 )   3817 - +   2001

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  • Hydrogen-bond network of dimeric copper complex of vanillic acid (HVA), [Cu(VA)(2)(H2O)](2) Reviewed

    LG Zhu, S Kitagawa, HC Chang, H Miyasaka

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS   342 ( 97-102 )   97 - 102   2000

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  • Synthesis, X-ray crystal structures and properties of chromium complexes with semiquinonate and catecholate Reviewed

    HC Chang, T Ishii, M Kondo, S Kitagawa

    JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS   ( 15 )   2467 - 2476   1999.8

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  • New Coordination Networks Constructed from N-(4-pyridyl)isonicotinamide Reviewed

    M. Kondo, A. Asami, H.-C. Chang, S. Kitagawa

    Cryst. Eng.   2 ( 2 )   115 - 122   1999.6

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  • Structural, spectroscopic and magnetic properties of charge-transfercomplex, (TMTSF) [Cr(Cl(4)SQ)(2)(Cl(4)Cat)]center dot 0.5CH(2)Cl(2) Reviewed

    HC Chang, S Kitagawa, M Kondo, T Ishii

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS   335   895 - 904   1999

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  • Structural, Spectroscopic and Magnetic Properties of Charge-Transfer Complex, (TMTSF)[Cr(Cl4SQ)2 (Cl4Cat)]•0.5CH2Cl2 Reviewed

    H.-C. Chang, S. Kitagawa, M. Kondo, T. Ishii

    Mol. Cryst. Liq. Cryst.   335   183 - 192   1999

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Books

  • Inorganic Chromotropism-Basic Concepts and Applications of Colored Materials

    S. Kitagawa, H.-C. Chang( Role: Joint authorChapter 8, 8.1, 337-354|rn|Ligand-based Redox-active Complexes for Electrochromic Materials)

    SPRINGER,講談社/福田豊・編  2007.5 

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    Responsible for pages:337-354   Language:English   Book type:Scholarly book

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  • 丸善株式会社実験化学講座第5版

    張 浩徹, 北川 進( Role: Joint author22巻, 4章,4-3|rn|原子価揺動錯体(バレンストートメリズム))

    丸善株式会社/日本化学会 編  2004.7 

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  • Synthesis, Structures, and Physico-Chemical Properties of Diruthenium Compounds of Tetrachloro-o-catecholate with Ru3+(m-OR)2Ru3+ and Ru3.5+(m-OR)2Ru3.5+ Cores (R = CH3, and C2H5)

    2001 

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  • A New Class of Cyclic Hexamer: [Co6L6]24- (H6L = hexaazatriphenylene hexacarboxylic acid)

    Angew. Chem. Int. Ed. Engl  2001 

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  • New Molecular Assemblies of Redox Isomers, [CrIII(X4SQ)3–n(X4Cat)n]–n (X = Cl, Br, n = 0, 1, and 2) with Metallocenium Cations, [MIIICp2]+ (M = Co and Fe), X-ray Crystal Structures and Physical Properties

    2001 

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  • Hydrogen-Bond Network of Dimeric Copper Complex of Vanillic Acid (HVA), [Cu(VA)2(H2O)]2

    2000 

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  • Synthesis, X-ray Crystallographic Structures and Properties of Chromium Complexes with Semiquinonate and Catecholate

    J. Chem. Soc. Dalton Trans  1999 

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  • New Coordination Networks Constructed from N-(4-pyridyl)isonicotinamide

    Cryst. Eng.  1999 

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  • Structural, Spectroscopic, and Magnetic Properties of Charge-transfer complex (TMTSF)[Cr(Cl4SQ)2(Cl4Cat)]0.5CH2Cl2 H.Chang, S.Kitagawa, M.Kondo, and T.Ishii

    Mol. Cryst. Liq. Cryst.  1999 

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MISC

  • o‐フェニレンジアミン3d金属錯体が示す光水素発生反応

    張浩徹, 松本剛, 上野導, 中山哲, 武次徹也, 小林厚志, 加藤昌子

    配位化合物の光化学討論会講演要旨集   24th   41 - 42   2012.8

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    J-GLOBAL

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  • PB33 Flexible Electronic Structures and Assembled Structures of Redox-active Metal Complexes

    CHANG Ho-Chol, KIRIYA Daisuke, SHIOZAKI Tomoki, OHMORI Takashi, KITAGAWA Susumu

    ( 2005 )   355 - 356   2005.9

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    Language:Japanese   Publisher:Japanese Liquid Crystal Society  

    CiNii Books

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  • PB08 Structural Control and Properties of Metal Complexes with Redox-active Polycatecholates

    CHANG Ho-Chol, SHIOZAKI Tomoki, FURUKAWA Hirotaka, YAMAUCHI Takae, KIRIYA Daisuke, KAMATA Akiko, KITAGAWA Susumu

    日本液晶学会討論会講演予稿集   ( 2004 )   344 - 345   2004.9

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    Novel mono/trinuclear palladium/platinum complexes and valence tautomeric Co complexes with alkyl chains have been characterized by X-ray diffraction, electrochemical, and thermogravimetric analyses. All the complexes possess catecholate derivatives, which have been known to show rich redox activity or bistability derived from the intramolecular electron transfer process. The results obtained in this study clearly suggest that the complexes would be candidates for redox-active metallomesogens.

    DOI: 10.11538/ekitou.2004.0.171.0

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  • Cover Picture: Angewandte Chemie International Edition 43(25) 2004年 Invited

    Tapas Kumar Maji, Kazuhiro Uemura, Ho-Chol Chang, Ryotaro Matsuda, Susumu Kitagawa

    Angewandte Chemie International Edition   43 ( 25 )   3205 - 3205   2004.6

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    Publisher:Wiley  

    DOI: 10.1002/anie.200490079

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  • 配位結合がつくる自己集合、自己組織化の世界

    北川進, 張 浩徹

    現代化学   24 - 30   2003.3

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Presentations

  • Molecular and Macroscopic Transformation of Assembled Metal Complexes by Electron Transfers

    Ho-Chol Chang

    International Conference on Coordination Chemistry 40  2012.9 

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  • σ-フェニレンジアミン3d金属錯体が示す光水素発生反応

    第24回配位化合物の光化学討論会  2012.8 

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  • Chemical Melting by Electron Transfer

    Ho-Chol Chang

    9th Japan-China Joint Symposium on Metal Cluster Compounds  2012.8 

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  • Chemical Melting by Electron Transfers

    Ho-Chol Chang

    8th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments  2012.6 

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  • Molecular and Macroscopic Transformation Triggered by Electron Transfer

    Ho-Chol Chang

    Canada-Japan Joint Symposium on Supramolecular Nanomaterials Science  2012.5 

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  • Molecular and Macroscopic Transformation Triggered by Electron Transfer

    Ho-Chol Chang

    12th Eurasia Conference on Chemical Sciences  2012.4 

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  • ノンイノセント型配位子を含む錯体集合体の外場応答性

    Innovationを目指す若手錯体科学者シンポジウム  2012.3 

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  • 外場誘起電子移動による分子とマクロ相の動的変換

    光応答性分子による機能性材料および界面構築に関する講演会  2011.12 

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  • Non-Innocentな錯体化学

    錯体化学若手の会夏の学校2012  2011.7 

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  • Synchronicity in Molecular and Macroscopic Bistability

    Ho-Chol Chang

    France-Japan Coordination Chemistry Symposium 2011  2011.6 

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  • Synchronic transformation of molecular states and macroscopic phases

    分子研研究会「金属錯体の機能化の現状と将来展望」  2011.1 

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  • Redox-active Metallomesogens: Fluctuated structures and electrochemical bistability

    Ho-Chol Chang

    PACIFICHEM 2010  2010.12 

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  • Synchronicity in Molecular and Macroscopic Bistability

    Ho-Chol Chang

    PACIFICHEM 2010  2010.12 

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  • Synchronicity in Molecular and Macroscopic Bistability

    Ho-Chol Chang

    The 1st International Symposium on Advanced Soft Materials  2010.11 

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  • Redox-active Metallomesogens

    Ho-Chol Chang

    Mini-symposium on Metallomesogens  2010.10 

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  • Synchronicity in Valence Tautomeric Bistability and Macroscopic Phase Transitions

    Ho-Chol Chang

    11th Eurasia Conference on Chemical Sciences  2010.10 

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  • Synchronicity in Valence Tautomeric Bistability and Macroscopic Phase Transitions

    Ho-Chol Chang

    8th China-Japan Joint Symposium on Metal Cluster Compounds  2010.8 

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  • 金属錯体液晶が示す揺動構造とレドックス双安定性

    日本化学会春季年会シンポジウム動的金属錯体の機能制御-価数制御と電子移動-  2010.3 

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  • レドックス活性双安定液晶の創成

    新学術領域研究—配位プログラミング第一回公開シンポジウム  2010.1 

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  • 電子が操るミクロ分子とマクロ世界のシンクロニシティー

    第59回錯体化学討論会シンポジウム「ソフトマターとしての金属錯体」Symposium  2009.9 

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  • Synchronic Transformation of Molecular States and Macroscopic Phases Triggered by Electron Transfer Processes

    Ho-Chol Chang

    The 3rd GCOE International Symposium, Hokkaido University Global COE Program  2009.9 

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  • Molecular Bistability Synchronized with Macroscopic Transition

    Ho-Chol Chang

    JSPS Asian CORE Program China-Japan Joint Symposium on Functional Supramolecular Architectures  2009.8 

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  • Synchronicity in Macroscopic Transformation and Electron Transfer Processes at Molecular Scale

    Ho-Chol Chang

    Asian International Symposium-Coordination and Organometallic Chemistry  2009.3 

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  • Macroscopic Phase Transformation Synchronized with Electron Transfers at Molecule

    Ho-Chol Chang

    Second Japan-Russia Joint Symposium on Chiral Porous Coordination Polymers for Separation and Catalysis  2009.2 

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  • 電子で繋ぐ分子とマクロ世界

    第2回研究会「金属錯体の固体物性科学最前線—錯体化学と固体物性物理の新奇融合領域創成をめざして」  2008.12 

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  • Stimuli-sensitive Dinuclear Ruthenium Complex with Redox-active Catecholates

    Ho-Chol Chang

    7th China-Japan Joint Symposium on Metal Cluster Compounds  2008.10 

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  • 液晶場におけるレドックス化学

    第58回錯体化学討論会シンポジウム「レドックス金属錯体が拓く未来科学」  2008.9 

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  • Synchronicity in Macroscopic Transformation and Electron Transfer Processes at Molecular Scale

    Ho-Chol Chang

    Asian International Symposium-Coordination and Organometallic Chemistry  2008.3 

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  • Redox-active Metallomesogens

    Ho-Chol Chang

    Mini-symposium on Metallomesogens  2007.10 

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  • Redox-active Molecular Assemblies in Solid, Liquid, and Liquid Crystals

    Ho-Chol Chang

    The 1st Brain Korea 21 International Symposium and Workshop on Material Chemistry-2006  2006.11 

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  • Redox-active Molecular Assembly within Solid, Liquid, and Liquid Crystal

    Ho-Chol Chang

    First International Symposium on Chemistry of Coordination Space -ISCCS 2005-  2005.11 

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  • レドックス活性金属錯体を用いた分子集団の動的制御と機能

    研究会「光エネルギーと物質変換:光合成・光触媒・太陽電池および関連化学の革新」  2004.11 

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  • Structural and Physicochemical Controls of Ligand-unsupported Diruthenium Complexes |rn|with Catecholates

    Ho-Chol Chang

    5th China-Japan Joint Symposium on Metal Cluster Compounds  2004.7 

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  • レドックス活性配位子を利用した機能性錯体集合体の構築

    分子研研究会「錯体分子でなにができるか」  2004.3 

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  • Ligand-Base Mixed-Valence Supramolecular Assemblies

    Ho-Chol Chang

    Gordon Research Conferences, Organic Structures & Properties  2002.7 

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  • 酸化還元活性オルトキノン型配位子を用いた双安定性錯体素子の創製

    特定領域「集積型金属錯体」若手講演会  2002.2 

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  • Synthesis and Characterization of Direct Ru–Ru Bond Systems by use of Catecholate Derivatives

    4th China-Japan Joint Symposium on Metal Cluster Compounds  2001.10 

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  • セミキノネート(SQ)/カテコラート(Cat)混合原子価型配位子を有する分子性金属錯体集合体の合成とその性質

    錯体化学若手の会近畿支部勉強会  2000.12 

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Awards

  • 日本化学会北海道支部奨励賞

    2013.1   日本化学会北海道支部   ノンイノセント型分子の外場応答性に基づく化学機能の創出

  • 平成20年度錯体化学会研究奨励賞

    2008.9   錯体化学会   Assembled Functional Chemistry of Redox-active Complexes

  • 日本化学会第86春季年会優秀講演賞

    2006.5   日本化学会   レドックス活性金属錯体の液晶化と構造化学的相制御

  • 財団法人金萬有科学振興会第24回科学技術奨励賞

    2001.5   財団法人金萬有科学振興会   双安定性を有する錯体集合体の合成と新規物性

Research Projects

  • Emergent Functional Chemistry Based on External-Field-Adaptive Molecular Lattices

    Grant number:23K26671  2023.4 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)  Chuo University

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    Grant amount: \18980000 ( Direct Cost: \14600000 、 Indirect Cost: \4380000 )

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  • Emergent Functional Chemistry Based on External-Field-Adaptive Molecular Lattices

    Grant number:23H01978  2023.4 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)  Chuo University

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    Grant amount: \18980000 ( Direct Cost: \14600000 、 Indirect Cost: \4380000 )

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  • 分子性錯体プリカーサーを用いた機能性無機材料の創成

    Grant number:22K19055  2022.6 - 2025.3

    日本学術振興会  科学研究費助成事業  挑戦的研究(萌芽)  中央大学

    張 浩徹

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    Grant amount: \6370000 ( Direct Cost: \4900000 、 Indirect Cost: \1470000 )

    本研究では、触媒活性や物性(磁性・誘電性)発現機能を担う元素・結合・特異的構造を持ち、且つ構造と組成が明確なMolecular Precursor(MP)を用いた新しい機能性無機材料合成法(以下、MP法)の確立を目的としている。本研究ではまずMP法の礎を構築しその有用性を実証すべく工業触媒としても広く活用されている多孔性アルミノシリケート型固体触媒の創成を目指しSi/Al/O系MPを用いた合成を遂行した。申請者らは、Si-O(H)-Al型の強Bronsted酸点を与える四配位Alサイトの選択的導入を指向したSi/Al/O系Spiro-7型MPからの結晶性ゼオライトの高選択合成に成功している。注目すべき事に、本手法は、従来のSiO2, Al2O3等を用いた合成よりも高い選択率で結晶性ゼオライトを与えると同時に、構造・組成が明確なSi/Al/O系MPからゼオライトを合成した初の例である。MP法によるゼオライトを合成することに成功した一方、生成したゼオライト骨格はspiro-7型構造のみでは構築できず、分子骨格が加水分解していることに着目した。そこでSi-C結合がSi-O結合より熱的安定性が低いことを利用し、単純な加熱のみでアルミノシリケートへ変換できると考え、spiro-7型分子が好気性条件下での連続昇温により全てのSi-Ph結合が活性化され、アルミノシリケートへと変換することに成功した。生成したアルミノシリケートはPh基に由来するマイクロサイズの細孔を有していたとともに、分子プリカーサー由来の構造も一部導入されていることを固体NMR法等により確認した。さらに、この構造に由来しBronsted酸性が発現し、実際に固体酸触媒として機能することも実証した。

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  • 光駆動型ハイドライドの精密設計

    Grant number:19H02736  2019.4 - 2023.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)  中央大学

    張 浩徹, 中田 明伸

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    Grant amount: \17420000 ( Direct Cost: \13400000 、 Indirect Cost: \4020000 )

    本研究では、申請者らが見出した非貴金属とH+及びe-を貯蔵できるπ系ジアミン配位子を含む錯体分子(Metal-binding π-diamine (MπA))を用いた光駆動型水素吸蔵・放出システムの学理を確立し、室温で光により駆動する光駆動型ハイドライドの確立を目指している。これまでの研究により本光駆動型ハイドライドの実現に向けた鍵反応である溶液中での励起状態水素脱離(ESHD)に基づいた光水素分子発生やアルコールの脱水素、また二酸化炭素の固定化や効率的な光ジスルフィド反応等の独創的な成果を見いだしてきた。一方これまでの反応系は溶液系であるために、溶媒との反応や副反応の抑制に課題を残している。さらに、水素重量密度を向上させる観点からも本材料の固体化が望まれる。そこで昨年度は、光水素貯蔵材料の固体化を目的とし、1,2,4,5-Benzenetetramine (BTA)を水素貯蔵部位及びESHD活性部位として用いた配位高分子において興味深い光電気化学挙動を見いだした。既報を参考に(Ni-BTA)nを修飾したITO電極は、モデル錯体であるNi(s-bqdi)2錯体と類似した890 nmに極大を有する吸収帯およびNH振動に特徴的なIR吸収を3300 cm-1に示した。また、この修飾電極は固体状態において配位子ベースの酸化及び還元に由来する電気化学応答を固体状態で示し、電気化学的に活性な物質であることが確認された。更に興味深い事に、-1 Vの定電位印加下において可視光を照射したところ、光カソード電流が増大し照射のON/OFFによりその応答が変調することも確認した。以上の結果は、電気化学的に電極上に形成した還元型高分子が光化学的に水素種・電子を放出することを期待させる。以上の知見は、高分子化した光水素脱離活性ユニットからの光水素脱離の可能性を示す興味深い結果である。

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  • Creation of novel reaction processes by precise control of highly active hydrogen

    Grant number:18H05517  2018.6 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Kyushu University

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    Grant amount: \202540000 ( Direct Cost: \155800000 、 Indirect Cost: \46740000 )

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  • レドックス活性キラル錯体集合体の電気化学的異方性変換

    2019.4 - 2021.3

    日本学術振興会  新学術領域研究(研究領域提案型) 

    張 浩徹

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \4940000 ( Direct Cost: \3800000 、 Indirect Cost: \1140000 )

    本研究「レドックス活性キラル錯体集合体の電気化学的異方性変換」では、レドックス活性な有機配位子を含むキラル錯体分子が集積化した結晶・液晶・液体を構築する。その目的は、凝集相に対する直接電気化学的レドックスを誘発することで、分子機能(電荷・スピン・不斉等)と集合相が階層的に連動する分子系を構築することにある。分子レベルにおける不斉種・不斉の強度・不斉の有無を集合相の異方性・次元性と結合させると共に、それをレドックスにより精密に変換・制御することで、自然界の対称性の破れを検証しうる配位アシンメトリーの学理を確立し、電気化学駆動制御型の光-電気-機能変換プラットホームを構築する。

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  • Photochemical dehydration of methanol by single-site-catalyst derived from redox-active metal complex

    Grant number:18K19101  2018.6 - 2020.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)  Chuo University

    Chand Ho-Chol

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    Grant amount: \6240000 ( Direct Cost: \4800000 、 Indirect Cost: \1440000 )

    In this work, we quantitatively revealed the relation between photochemical dehydration activity of MeOH via aminophenolato metal complexes and their co-ligands. We found that the complexation of M/apH unit with co-ligand depend on the nature of M and co-ligand. In particular, the activity increases up to 3.9 times when M = Fe with tBuCN as co-ligand with strong sigma-donation ability. These results would contribute towards the construction of single-site dehydration catalysis based on transition metal complexes with ligands with electron/proton pooling properties. In addition to these results, we also succeed in developing new synthesis method of aluminosilicate )zeolite which would be useful as host for molecular catalyst. We found that a molecular cluster with six Si and a Al atom afforded zeolite L and W at around 160 degreeC under hydrothermal condition. It is noteworthy that this processes do not need any pretreatment of precursors which is needed in the conventional methods.

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  • レドックス活性キラル錯体集合体の電気化学的異方性変換

    Grant number:17H05382  2017.4 - 2019.3

    日本学術振興会  科学研究費助成事業  新学術領域研究(研究領域提案型)  中央大学

    張 浩徹

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    Grant amount: \4680000 ( Direct Cost: \3600000 、 Indirect Cost: \1080000 )

    本研究は、レドックス活性能を有するキラル錯体分子集合体を創成し、凝集相における電気化学反応を誘発することで、不斉構造と連動した異方的相状態の動的変換と機能発現を指向している。当該年度においては、シンコニジウムカチオンなどのキラルカチオン認識能を有する[Δ-PⅤ(Cl4Cat)3]-(Δ-TRISPHAT)と類似構造を有するレドックス活性[CrIII(Cl4SQ)2(Cl4Cat)]-を用いることで、動的なレドックス誘起不斉機能変換を指向した。(n-Bu3NH)[CrIII(Cl4SQ)2(Cl4Cat)]と半当量のcinHをCH2Cl2中で反応させ、CH2Cl2に可溶な紫色固体と不溶性紫色固体を単離した。両生成物の溶解度の違いから、前者は(n-Bu3NH)カチオンを含む錯体である一方、後者はかさ高いカチオンであるcinHを含む(cinH)[Δ-CrIII(Cl4SQ)2(Cl4Cat)]であることが示唆された。以上の結果から、本レドックス活性Oh型アニオンの不斉認識能が示唆された。
    続いて本研究では、不斉レドックス活性錯体を用いた超分子結晶・液晶・液体を創成すべく、レドックス活性錯体に修飾し、中間相の形成に大きな影響を及ぼす側鎖に着目し、従来の剛直且つ疎水性アルキル鎖に加え、柔軟性と両親媒性を併せ持つDEG鎖を修飾した新規錯体群[Pt(R-Cat)(R'-bpy)]を合成し、各物性への導入効果影響を検討した。その結果、[Pt(Cat)(C9bpy)]及び[Pt(Cat)(DEGbpy)]は、鎖種に依存した集積構造を形成した。また[Pt(C8Cat)(DEGbpy)]は異種側鎖の共存により液晶相を形成することも初めて明らかにした。更にDEG鎖修飾により低極性溶媒中で錯体の自己集合を誘発可能であることを明らかにした。

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  • Fablication of chemical energy carrier system by fusion of non-precious metals

    Grant number:16H04123  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)  Chuo University

    Chang Ho-Chol

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    Grant amount: \17160000 ( Direct Cost: \13200000 、 Indirect Cost: \3960000 )

    (1) We demonstrated that the photochemical hydrogen evolution reaction of our system can be driven by purely ligand-based processes that have been proved by the isolation of intermediates with ligand-based proton-coupled mixed valent ligands. We also experimentally proved that our system can be modulated by changing metal ions (such as from Fe(II) with d6 electrons to Mn(II) with d5 electrons, substituents (such as t-butyl and Cl groups) on the ligands. (2) To develop photodehydrogenation catalyst, we demonstrated the effects of metal ions (such as Mg(II), Mn(II), Co(II), Zn(II)), substituents (such as t-butyl and Cl groups), and spin states of metal center. As results, the catalytic activity has significantly increased by these chemical factors.

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  • Catalytic reduction of CO2 in polarized reaction field made by non-innocent-type non-precious metal complexes

    Grant number:16K13967  2016.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research  Chuo University

    CHANG HO-CHOL

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    Grant amount: \3640000 ( Direct Cost: \2800000 、 Indirect Cost: \840000 )

    In this project, we found that (a) the direct photochemical carboxylation of C-H bonds in aromatic diamines with CO2 by o-phenylenediamine Fe(II) complex in the absence of electron donor and base, (b) the promotion effect of the Fe(II) ion in photochemical carboxylation,
    (c) and the mechanistic studies on photochemical hydrogen generation by using 2-methylpropane-2-thiol as a radical trapping reagent. Although the carboxylation reaction presented in this work is a stoichiometric reaction, it is nevertheless the first example of atom- and step-economic direct carboxylation of the C-H bonds in benzene rings and that does not require potentially reactive electron donors or strong bases.

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  • 非平衡反応場における金属錯体の自励双安定化

    2012.4 - 2014.3

    文部科学省  科学研究費補助金(日本学術振興会・文部科学省)-挑戦的萌芽研究 

    張 浩徹

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    Authorship:Principal investigator  Grant type:Competitive

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  • Construction of Luminescent Chromic Metal Complexes with Dynamic Ordering

    Grant number:23350025  2011.4 - 2014.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)  Hokkaido University

    KATO Masako, KOBAYASHI Atsushi, CHANG Ho-chol

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    Grant amount: \20410000 ( Direct Cost: \15700000 、 Indirect Cost: \4710000 )

    The purpose of this project is to construct novel assembled metal complex systems with dynamical ordering by using various intermolecular interactions such as metal-metal, pai-pai, hydrophobic, and hydrogen bonding interactions. In this concept, we have developed luminescent metal complexes which exhibit unique chromic behaviors in response to the various environmental stimuli such as vapor, light, and heat: 1) Vapochromic coordination polymers and suplamolecular restorable systems based on luminescent platinum(II) or ruthenium(II) complexes; 2) Luminescent dinuclear copper(I) complexes which exhibit luminescence changes induced by light and vapor; 3) Vapor and mechanically induced chromic behavior of platinum(II) complexes with a dimer-of-dimer motif and the effect of hetero metal ions.

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  • レドックス活性配位子の導入による非貴金属型水分解触媒の創成

    2012.4 - 2013.10

    日揮財団  奨学寄付金 

    張 浩徹

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  • レドックス活性配位子を導入した3d金属水分解触媒の創成

    2012.4 - 2013.3

    松籟科学技術振興財団  奨学寄付金 

    張 浩徹

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    Authorship:Principal investigator  Grant type:Competitive

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  • 光分子集積を指向した金属錯体の光融解と光結晶化

    2010.4 - 2011.10

    文部科学省  科学研究費補助金(日本学術振興会・文部科学省)-基盤研究(C) 

    張 浩徹

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    Authorship:Principal investigator  Grant type:Competitive

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  • An innovative platform for non-thermal, synchronic control of macroscopic phase and molecular properties in micro scale.

    Grant number:18685006  2006 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (A)  Kyoto University

    CHANG Ho-chol

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    Grant amount: \30290000 ( Direct Cost: \23300000 、 Indirect Cost: \6990000 )

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  • 結晶融解法を用いたレドックス活性金属錯体の配向及び電界効果トランジスタ能制御

    Grant number:18655056  2006 - 2007

    日本学術振興会  科学研究費助成事業  萌芽研究  京都大学

    張 浩徹

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    Grant amount: \3600000 ( Direct Cost: \3600000 )

    本研究は、課題(A)「モジュール化学の展開とバルク物性制御」(平成18年度)、課題(B)「基盤環境と結晶化プロセスによる薄膜結晶相制御」(平成18-19年度)、課題(C)「アンバイポーラFET能の最適化条件の探索」(平成19年度)から構成される。初年度における1)[M(Cat)(Cnbpy)](M=Pt,Pd);Cat=catecholate,n=9-17)群や[M(Bdt)(Cnbpy)](M=Pt,Pd);Bdt=benezenedithiolato,n=9-17]群が等方性液体から結晶化する際にシリコン基盤上にて一軸配向すること、2)[Pt(Bdt)(Mebpy)]が新規p型FET活性物質である、最後に3)これらの分子が示す一軸配向性に長鎖に含まれる炭素数依存性があることを基にH19年度の研究を進めた。その結果、1)PMMA処理を施したシリコン基板上にて真空蒸着法で作成した薄膜Ni錯体がCa電極を用いることで4.3*10_3及び1.6*10_2 cm2/Vsのホール及び電子移動度を示すことを明らかにした。このようにp,n型バランスのとれた高い移動度を示す物質は非常に限られている。またこの錯体の類似骨格に長鎖を付与することで融解法により同様の性質が得られることを強く示す結果である。2)また我々は結晶及び液晶を示す錯体を用いて融解法によりITO|[Pt(R-Cat)(C8,10bpy)]|ITO型デバイスを作成し、I-V特性を測定したとこ特にポリイミド処理を施したITO基盤上で良好な照射光強度とI値の相関を見いだした。またITO|錯体|AIのデバイスにおいて僅かであるが光電変換特性を見いだした。以上の結果により融解法がFETデバイスのみならず太陽電池などの光電変換デバイスへの応用が過当となることを示す結果を得た。

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  • Syntheses of Innovative Porous Metal Complexes and Their Functional Chemistry

    Grant number:16074209  2004 - 2007

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Priority Areas  Kyoto University

    KITAGAWA Susumu, OHBA Masaaki, CHANG Ho-Chol, UEMURA Takashi, INAGAKI Shinji

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    Grant amount: \127000000 ( Direct Cost: \127000000 )

    In this project, we aim to develop functions with the characteristics of porous coordination polymers (PCPs)such as designable surface functionality, high regularity, and framework flexibility Highly controlled acetylene accommodation in a microporous coordination polymer has been accomplished by preparing a pore surface specific for acetylenic hydrogen atoms. The acetylene can be packed 200 times as densely as the limitation value without explosion. The adsorbed acetylene molecules are highly stabilized by the double hydrogen bonded supports in nanosized pores, which mere revealed by direct observation of the adsorbed molecules using the results of in-situ synchrotron XRD measurements and by first principles calculations.
    We have designed and synthesized a bimodal microporous twofold interpenetrating PCP with two types of channel for anionic N(CN)2- and neutral water molecules, respectively. The dehydrated framework provides a dual function of specific anion exchange of free N(CN)2- for the smaller N3- anions and selective gas sorption. The N3--exchanged framework leads to a dislocation of the mutual positions of the two interpenetrating frameworks, resulting in an increase in the effective pore size in one of the counterparts of the channels and a higher accommodation of adsorbate than in the as-synthesized framework.
    A few substituted acetylenes spontaneously polymerized in one-dimensional nanochannels of PCPs with pillared layer structure. In this polymerization system, only mono-substituted acetylenes with electron-withdrawing group could be polymerized in the channels. suggesting that strong hydrogen bonding interaction between the monomers and surface carboxylate moiety in the frameworks is a key factor to initiate the polymerization.

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  • 酸化還元活性金属錯体の薄膜構造精密制御とバイポーラトランジスタへの応用

    Grant number:16750118  2005    

    日本学術振興会  科学研究費助成事業  若手研究(B)  京都大学

    張 浩徹

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    Grant amount: \3300000 ( Direct Cost: \3300000 )

    本研究では、(1)酸化及び還元に対し活性な分子性金属錯体の薄膜相における精密構造解析を行い、薄膜相における高均一性分子配列制御及びバルク結晶相とは異なる"薄膜結晶相"の探索を第一目的とした。また本研究では、(2)酸化還元活性オルトキノン金属錯体を用いて、配位子上で混合原子価状態をつくりだし、ドナー性配位子部位とアクセプター性配位子部位の直接的な分子間相互作用により、有効な重なり積分とバンドの広がりを促し、バンド伝導に基づいた高速の移動度を達成することを目的とした。最後に(3)バイポーラTFT活性能を評価することで作成した薄層相の構造均一性を評価し、「薄膜相構造-電子物性相関」を総合的に明らかにする。具体的課題としては、より均一性の高い(単結晶性の高い)薄膜相を得るために、薄膜成長条件(錯体分子構造、蒸着速度、基盤温度、蒸着速度、キャリアガス種、基盤種等)の最適化を行う。またより高い移動度を達成することを目的に、薄膜の単結晶性の向上や酸化還元電位(HOMO-LUMO準位、ギャップ)の最適化を遂行すると共に、バンド伝導に必要な錯体分子間相互作用の増強に基づくデバイス能の向上を試み、世界に先駆的に錯体分子バイポーラTFTを開発することを目的とする。昨年度は酸化及び還元活性なビスジイミノセミキノネート錯体を用いて電界効果トランジスタ能の発現に初めて成功した。分子性金属錯体のFET活性能に関する報告例は皆無に近い。得られた薄膜性錯体は理想的に駆動するp型デバイスであり、移動度は0.0138cm2/Vs(飽和領域)である。また、デバイス特性は真空中及び大気中でも変化なく、薄膜の安定性も示された。以上の知見をもとに、同様の錯体である[Pt(diiminosemiquinonate)2],[Pd(diiminosemiquinonate)2]を用いたFETを開発し、金属種依存性を明らかにした。Ni,Pt,Pdのうち、Ni錯体が最も高い移動度を示した。本年度は更に、目的であるアンバイポーラ能を発現することを目的に、Ni錯体を用い、基盤にPMMAを処理し、電極にはCaを用いることでn型FET能の発現に成功した。またアニーリングにより、n型特性が発現することも成功した。これは加熱処理による電子トラップサイトの減少が原因と考えられる。以上得られた成果により世界にさきがけて金属錯体を用いたアンバイポーラ型FETの創成に成功したと言える。

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  • 混合原子価金属錯体を用いた単一分子素子とそのナノ集合体の機能創製

    Grant number:14740362  2002 - 2003

    日本学術振興会  科学研究費助成事業  若手研究(B)  京都大学

    張 浩徹

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    Grant amount: \3800000 ( Direct Cost: \3800000 )

    近年、化学的及び物理的手法を駆使した単分子レベルにおける状態変換や、ナノスケール特有の量子効果に基づいた単分子電子素子の開発が注目を集めている。本研究ではそのための最重要課題として、(1)物理的及び化学的摂動に対し応答し、分子内電子状態を変換しうる双安定性分子の構築と(2)引き起こされる分子内状態変換を隣接分子へ伝達しうる超分子システムを合理的に構築することに注目し研究を遂行している。特に、「混合原子価状態」という非対称的な電子構造を「分子が持つ情報」として活用する事で、金属錯体ならではの性質を示す電子素子を開発することを目的としている。
    本研究では、2年間の研究過程に、長鎖アルキル基を有する新規平面性Pd,Pt錯体の合成に成功し、その結晶構造解析により構造を明らかにすると同時に、ナノサイズの混合原子価金属錯体を合成することを目的に、原子価互変異性に基づく双安定性を示すCoキノン錯体をモジュールとした新規クラスターの合成方法を見出した。得られた新規5,6,10核クラスター錯体は、金属及び配位子ともに電子スピンを有し、かつ配位子が混合原子価状態である、これまでにない類を見ないナノサイズクラスターである。本研究ではこれらの分子構造を明らかにすると共に、その生成機構並びに磁性について検討を行い、錯体が外場により、金属-配位子間又は配位子間の電荷および電子移動が誘起される可能性を確認した。また本クラスター錯体は、反応活性なセミキノネートとフェニレンジアミン間の脱水縮合反応がその形成の引き金となり生成することを明らかとし、他種金属イオンにも応用可能であり、且つ多様なナノサイズ金属錯体クラスターの創成に有用な反応であることを示した。

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  • 水溶性レセプターの合理的合成法の開発

    Grant number:14044045  2002 - 2003

    日本学術振興会  科学研究費助成事業  特定領域研究 

    水谷 義, 張 浩徹

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    Grant amount: \4100000 ( Direct Cost: \4100000 )

    水溶性レセプターの合成は、タンパク質やDNAなどの生体高分子の分子認識機構の解明や生理活性分子の分離・検出などを行うための基本となるものであるが、これまでに、合成方法の立場から詳細な検討は行われてきていない。特に、疎水性と親水性の二面性をもつ分子を合成する必要があり、親水基の導入のタイミングなどが、合成の成否を分けるものと考えられる。われわれは、これまでの研究で、疎水性のポルフィリンを骨格に用いて分子認識サイトを構築し、これに親水性部位を導入する方法についていろいろと検討してきた。
    水溶性を付与するための官能基としてアニオン性のカルボキシレートを多数導入したポルフィリンについては、以前に報告したが、この分子は、不十分な疎水空間を有することが分かった。そこで、中性の親水性官能基としてポリエチレンオキシドを導入したポルフィリンの合成方法を検討した。
    合成方法としては、末端にカルボン酸基をもつポルフィリンをまず、合成し、これを、末端がアミノ基のポリエチレンオキシドと縮合剤でカップリングさせた。このようにして合成した水溶性ポルフィリンレセプターは、いろいろなアミンを水中で取り込み、特に効果的に疎水相互作用が働くことが分かった。特に、いろいろなアルキル鎖の長さをもつ4-アルキルピリジンとの結合定数を吸収スペクトルで測定すると、アルキル基の炭素が1つ増えるごとに3.5kJ/mol分の結合自由エネルギーの増加が見られた。これは、水とオクタノールなどの分配係数から見積もったメチレン基1つあたりの自由エネルギーとほぼ同じであり、水中に理想的な疎水空間が構築されていることが分かった。
    水溶性高分子と疎水性人工レセプターの組み合わせで、いろいろなレセプターの合成が可能であると期待でき、将来のいろいろな展望を示すことができた。

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  • Functional Chemistry of Guest-responsive Nano Space Created by Coordination Polymers

    Grant number:13440195  2001 - 2002

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)  KYOTO UNIVERSITY

    KITAGAWA Susumu, CHANG Ho-Chol

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    Grant amount: \12900000 ( Direct Cost: \12900000 )

    The advent of robust coordination polymer frameworks demonstrated that solid coordination compounds were acquiring an important position in porous materials and expanding materials-directed coordination chemistry.
    However, this sort of compounds are considered to be static materials.
    If we take advantages of coordination polymers, we could provide dynamic materials with flexible frameworks, which are so-called 3rd generation compound. In this manuscript we focus on a pillared-layer motif relevant for this sort of frameworks, which create not only a channel size and shape but also a chemical functionality simply by modifying the pillar module.
    In this manuscript, we succeeded in designing and realizing a new pillared-layer type coordination polymer.
    1) The obtained compound is rationally synthesized by using a pillared layer framework. By taking advantages of the framework, we succeeded in creating a hydrogen bonding channel with 1,2-dipyridylglycoI (dpyg), whose interaction is used only for guests having hydrogen bonding capability.
    This type of framework is very few
    Coordination polymers with two-dimensional frameworks with a double-edged axe-shaped motif have also been synthesized from reactions of cobalt(II) thiocyanate with N-(3-pyridy) isonicotinamide (3-pia) or N-(3-pyridyl)nicotinamide (3-pna). Crystal-to-crystal transformation accompanying inclusion of guest molecules by dynamically switching amide groups in the structure has been found.
    2) This novel network exhibits a crystal to crystal transformation under guest vapor/reduced atmosphere.
    3) What is most interesting is "finding of hysteretic sorption properties" for water or methanol vapor. The framework conversion from the apohost to adsorbed one is driven by hydrogen bonding interaction with the guests, indicating that the framework responds to a specific guest molecule and changes its microcavities into those well-suited for the shape and/or affinity of the guest molecule. This unique properties opened up a new dimension to materials-directed coordination chemistry.

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  • 多元素環状化合物を用いた分子認識素子の開発

    Grant number:13029054  2001    

    日本学術振興会  科学研究費助成事業  特定領域研究(A)  京都大学

    水谷 義, 張 浩徹

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    Grant amount: \2200000 ( Direct Cost: \2200000 )

    タンパク質ではない人工分子で生理活性物質を特異的に認識し捕捉するような人工レセプターの研究は、環境問題、エネルギー問題などとの関係から興味深く、また、遺伝子情報からの新しい創薬の可能性とも関連して重要な研究テーマである。
    われわれは、水酸基をもつ多くの生理活性物質が知られているにもかかわらず、そのようなアルコール・フェノールに対して特異的に結合するような人工レセプター、あるいは、認識モチーフがほとんど知られていないことに着目し、アルコール・フェノールを水中で捕捉する人工レセプターの設計と合成について検討している。
    ポルフィリンの剛直な骨格と、疎水的な相互作用面、ポルフィリンの中心金属による酸素原子に対する親和性を協同的に利用することで、アルコール・フェノールを認識するモチーフとなるのではないかと考え、種々のポルフィリン誘導体の金属錯体を合成した。ポルフィリンの骨格としては、金属のルイス酸点の近傍に基、水酸基の認識において協同的に働くと期待できるルイス塩基点を導入するために、meso-位にキノリル基、o-エステル置換フェニル基をもつポルフィリン誘導体を新しく合成した。また、中心の金属としては、アルミニウム、マグネシウム、亜鉛などをポルフィリンに挿入し、金属イオンの違いによる酸素親和性の相違を検討した。
    その結果、アルミニウムポルフィリンを用いて、有機溶媒中でフェノールの結合定数を評価すると、亜鉛、マグネシウムポルフィリンよりも大きな結合定数が得られ、酸素原子をもつゲストに対する親和性が大きな分子を合成することが可能であった。しかし、同様の実験を水中で行うと、アルミニウムポルフィリンよりも、むしろ、亜鉛ポルフィリンの方が大きな親和性が見られ、アルミニウムポルフィリンは溶媒効果をより強く受けることが明らかとなった。

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  • Preparation of Electric Field-Applicable Solid State NMR Probe

    Grant number:12554031  2000 - 2001

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)  KYOTO UNIVERSITY

    KITAGAWA Susumu, MIZUTANI Tadashi, ENDO Kazuo, FUJITO Teruaki, CHANG Ho-chol

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    Grant amount: \10300000 ( Direct Cost: \10300000 )

    We have constructed a new NMR probe for the measurement of solid state NMR spectra under the electric field. The high-power amplifier was used for the observation of the spectra. The sample in the dyfron plate vessel. The sample stage was mounted in the goniohead so that the stage can be rotated. Consequently, the electric field can be applied to the sample in the region of -90 - +90°against the magnetic field. To avoid an evolution of heat, cooled air was supplied to the stage by the tube. High-voltage rapid electric amplifier was installed, which can apply direct voltage of 0-500 V to the sample. Using the probe, we have measured ^<13>C NMR spectra of 4-cyano-4'-n-pentylbiphenyl (5CB), which shows a nematic liquid crystal phase at room temperature, by stepwise increase of a electric field. The obtained spectra are found to be in good agreement with previous reports on a local motion and an electronic structures of 5CB. In addition we have used the probe to characterize microporous coordination polymers with guest inclusion ability.

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  • 酸化還元活性金属錯体液晶における動的構造と物性制御

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    Grant type:Competitive

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