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2008 Fiscal Year Annual Research Report

生体系の柔軟な構造と反応過程の理論的研究

Research Project

Project/Area Number 18066013
Research InstitutionKyushu University

Principal Investigator

吉澤 一成  Kyushu University, 先導物質化学研究所, 教授 (30273486)

Keywords量子化学 / 化学反応 / 密度汎関数法 / 酵素 / 量子輸送過程
Research Abstract

本研究では生体内の化学反応と電子輸送過程の理論的研究を行った。生体系における電子移動反応は酵素反応において極めて重要な役割を果たしている。最近、単一分子からなる分子ワイヤーのコンダクタンスに関する研究が注目を集めている。一次元系のコンダクタンスを与えるLandauerの理論がナノスケール領域における電気伝導理論として用いられ、ナノサイズ分子特有の伝導現象を示す分子ワイヤーのI-V特性などが再現されている。ここでは、量子化学の重要な概念である軌道理論から分子ワイヤーのコンダクタンスについて議論した。分子における電子の輸送にはフロンティア軌道の振幅と位相が決定的な役割を果たすことを示した。これらを密度汎関数法による定量的な計算結果と比較し、定性的な軌道の議論が普遍的に成り立つことを明らかにした。単一分子の量子輸送過程とフロンティア軌道の関係をさらに深く理解するため、東大と阪大の実験グループとの連携の下に共同研究を行っている。この結果は、Journal of the American Chemical Societyに公表された。その他に金属酵素や触媒に関連する理論的研究を行った。

  • Research Products

    (17 results)

All 2009 2008 2007

All Journal Article (17 results) (of which Peer Reviewed: 17 results)

  • [Journal Article] Comparison of the Reactivity of Bis(μ-oxo)Cu^<II>cu^<III> and Cu^<III> Cu^<III> Species to Methane2009

    • Author(s)
      Y. Shiota, et.al.
    • Journal Title

      Inorganic Chemistry 48

      Pages: 838-845

    • Peer Reviewed
  • [Journal Article] Photochemical Reversibility of Ring-Closing and Ring-Opening Reactions in Diarylperfluorocyclopentenes2009

    • Author(s)
      A. Staykov, et.al.
    • Journal Title

      Journal of Physical Chemistry C 113(in press)

    • Peer Reviewed
  • [Journal Article] Orbital View Concept Applied on Photoswitching Systems2009

    • Author(s)
      Y. Tsuji, et.al.
    • Journal Title

      Thin Solid films (in press)

    • Peer Reviewed
  • [Journal Article] DFT Study on the Mechanism of NΞN Bond Cleavage by a Bis(μ-hvdrido) diniobium Comples2009

    • Author(s)
      H. Tanaka, et.al.
    • Journal Title

      Inorganic Chemistry 48(in press)

    • Peer Reviewed
  • [Journal Article] What is the Identity of the Metal Ions in the Active Sites of Coenzyme BirDependent Diol Dehydratase? A Computational Mutation Analysis2009

    • Author(s)
      T. Kamachi, et.al.
    • Journal Title

      Journal of Physical Chemistry B 113(in press)

    • Peer Reviewed
  • [Journal Article] Bistability of Magnetization of Hgh-Spin Cobalt(II) Complex Controlled by Quenching Angular Momentum2009

    • Author(s)
      G. Juhasz, et.al.
    • Journal Title

      Journal of the American Chemical Society I (in press)

    • Peer Reviewed
  • [Journal Article] Theoretical Analysis of the Reaction Mechanism of Biotin Carboxylase2008

    • Author(s)
      Y. Ito, et.al.
    • Journal Title

      Journal of Chemical Theory and Computation 4

      Pages: 366-374

    • Peer Reviewed
  • [Journal Article] Synthesis and Characterization of Novel Ferrocene-Containing Pyridylamine Ligand and Their Ruthenium(II) Complexes : Electronic Communication through Hydrogen-bonded Amide Linkage2008

    • Author(s)
      T. Kojima, et.al.
    • Journal Title

      Inorganic Chemistry 47

      Pages: 886-895

    • Peer Reviewed
  • [Journal Article] DFT Study on Chemical N_2 Fixation by Using a Cubane-Type RuIr_3S_4 Cluster : Energy Profile for Binding and Reduction of N_2 to Ammonia via Ru-N-NHx (x = 1-3) Intermediates with Unique Structures2008

    • Author(s)
      H. Tanaka, et.al.
    • Journal Title

      Journal of the American Chemical Society 130

      Pages: 9037-9047

    • Peer Reviewed
  • [Journal Article] Rutenium-Catalyzed Selective and Efficient Oxygenation of Hydrocarbons with Water as an Oxygen Source2008

    • Author(s)
      Y. Hirata, et.al.
    • Journal Title

      Angewandte Chemie International Edition 47

      Pages: 5772-5776

    • Peer Reviewed
  • [Journal Article] Orbital Views of the Electron Transport in Molecular Devices2008

    • Author(s)
      K. Yoshizawa, et.al.
    • Journal Title

      Journal of the American Chemical Society 130

      Pages: 9406-9413

    • Peer Reviewed
  • [Journal Article] Mechanism and Kinetics of Cyanide Destruction by Ferrate2008

    • Author(s)
      T. Kamachi, et.al.
    • Journal Title

      Bulletin of the Chemical Society of Japan 81

      Pages: 1212-1218

    • Peer Reviewed
  • [Journal Article] Theoretical Study of Long-Ranged Electron Transport in Molecular Junctions2008

    • Author(s)
      D. Nozaki, et.al.
    • Journal Title

      Journal of Physical Chemistry C 112

      Pages: 17408-17415

    • Peer Reviewed
  • [Journal Article] Combined Experimental and Theoretical Approach to Understand the Reactivity of a Mononuclear COD-Hydroperoxo Complex in Oxgenation Reactions2008

    • Author(s)
      T. Kamachi, et.al.
    • Journal Title

      Journal of Physical Chemistry A 112

      Pages: 13102-13108

    • Peer Reviewed
  • [Journal Article] Quantum Chemical Approach to the Mechanism for the Biological Conversion of Tyrosine to Dopaquinone2008

    • Author(s)
      T. Inoue, et.al.
    • Journal Title

      Journal of the American Chemical Society 130

      Pages: 16890-16897

    • Peer Reviewed
  • [Journal Article] Theoretical Study of the Direct Synthesis of H_2O_2 on Pd and Pd/Au Surfaces2008

    • Author(s)
      A. Staykov, et.al.
    • Journal Title

      Journal of Physical Chemistry B 112

      Pages: 19501-19595

    • Peer Reviewed
  • [Journal Article] Silicon-Carbon Unsaturated Compounds. 74. Thermal Behavior of 1-Silacyclobut-3-enes Generated from the Reactioq of Acylpolysilanes with tert-Butylacetylene2007

    • Author(s)
      A. Naka, et.al.
    • Journal Title

      Organometallics 27

      Pages: 2750-2755

    • Peer Reviewed

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Published: 2010-06-11   Modified: 2016-04-21  

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