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Analysis of dynamic factors controlling photochemical reaction pathways using a combination of quantum mechanical and molecular dynamics methods

Research Project

Project/Area Number 20K05423
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionKanagawa University

Principal Investigator

Matsubara Toshiaki  神奈川大学, 理学部, 教授 (60239069)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords光異性化反応 / 経路選択 / 円錐交差 / 動的因子 / 反応制御 / 分子動力学シミュレーション / 光反応経路 / 光誘起反応 / 反応経路選択 / 量子力学計算 / 分子動力学計算 / 光励起反応
Outline of Research at the Start

近年、有機材料や天然物合成といった分野で光化学反応の研究が活発になり、最先端分野への応用が注目を集めている。これらの光化学反応では、異なる電子状態間のエネルギー面の円錐交差を経由して反応が進行するため、円錐交差点で存在する分かれ道のどちらの経路を選択するかは、反応制御において極めて重要である。本研究では、円錐交差点の経路選択における動的因子の解析法を構築し、経路選択している動的因子を解明する。

Outline of Final Research Achievements

In recent years, photoisomerization has been widely applied to organic materials for optical switches and the syntheses of natural products. This reaction proceeds through a conical intersection between different electronic states, and the selection of the reaction channel at the conical intersection is crucial in controlling the reaction. In this study, we examined the dynamic factors that influence channel selection at the conical intersection for the photoisomerization of butadiene and azobenzene. Our results showed that dynamic factors such as thermal fluctuations and energy redistribution at the conical intersection play a significant role in channel selection.

Academic Significance and Societal Importance of the Research Achievements

光異性化反応における反応経路の選択は、異なる電子状態が交差する円錐状の領域で起こる。この反応経路の選択に影響を与える要因を明らかにできたことは、光異性化反応の制御や設計において学術的に重要である。光異性化の選択性を向上させることで、例えば、より高機能な光スイッチの開発が可能になり、医薬品の合成においては生産性の向上が期待でき、社会的意義がある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Dynamic effects of the bridged structure on the quantum yield of the <i>cis</i> → <i>trans</i> photoisomerization of azobenzene2022

    • Author(s)
      Matsubara Toshiaki
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 24 Issue: 28 Pages: 17303-17313

    • DOI

      10.1039/d2cp02418g

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamic Effects on the Product Distribution of the Photoreaction of s-cis-1,3-Butadiene: A Nonadiabatic Molecular Dynamics Study2021

    • Author(s)
      Toshiaki Matsubara
    • Journal Title

      Bull. Chem. Soc. Jpn.

      Volume: 94 Issue: 6 Pages: 1720-1727

    • DOI

      10.1246/bcsj.20210069

    • NAID

      130008066548

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Density Functional Study of σ Bond Cleavage in P–P Multiple Bond of Phosphinophosphinidene2021

    • Author(s)
      Toshiaki Matsubara and Keisuke Shirasaka
    • Journal Title

      Journal of Computer Chemistry, Japan -International Edition

      Volume: 7 Issue: 0 Pages: n/a

    • DOI

      10.2477/jccjie.2020-0003

    • NAID

      130008051008

    • ISSN
      2189-048X
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Density Functional Study of σ Bond Cleavage in P-P Multiple Bond of Phosphinophosphinidene2021

    • Author(s)
      Toshiaki Matsubara and Keisuke Shirasaka
    • Journal Title

      Journal of Computer Chemistry, Japan -International Edition

      Volume: 7

    • NAID

      130008051008

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Dynamic Effects on the Photoinduced and Ionization-Induced Reactions2023

    • Author(s)
      Toshiaki Matsubara
    • Organizer
      Asia Pacific Conference of Theoretical and Computational Chemistry
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] An Insight into the Photoinduced Chemical Reactions from a Dynamical Point of View2022

    • Author(s)
      Toshiaki Matsubara
    • Organizer
      12th Triennial Congress of the World Association of Theoretical and Computational Chemists
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] An Insight into the Photoinduced Chemical Reactions from a Dynamical Point of View2022

    • Author(s)
      Toshiaki Matsubara
    • Organizer
      12th Triennial Congress of the World Association of Theoretical and Computational Chemists (WATOC 2020)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 松原研究室

    • URL

      https://www.sci.kanagawa-u.ac.jp/chem/matsubara/

    • Related Report
      2022 Annual Research Report 2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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