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The role of intermolecular interaction in solvent reorientation dynamics ---A molecular scopic study utilizing time-resolved IR spectroscopy---

Research Project

Project/Area Number 19K05368
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 InstitutionOchanomizu University

Principal Investigator

Miyazaki Mitsuhiko  お茶の水女子大学, 基幹研究院, 准教授 (00378598)

Project Period (FY) 2019-11-28 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords時間分解赤外分光 / 溶媒和クラスター / 溶媒和ダイナミクス / 分子動力学計算 / 赤外分光
Outline of Research at the Start

化学反応のメカニズムは、反応が起きる分子、原子だけでなく、その周囲を取り囲む溶媒分子の挙動により大きな影響を受ける。これまで、溶媒の挙動は、均一な溶媒分子集団による集合的作用として扱う事が一般に行われてきた。
本研究では、この均一集団モデルを超えて個別分子の運動に基づく分子論的な溶媒和効果理解の基礎を確立するために、三つ以上の分子から構成される気相溶媒和クラスターをモデル系として、溶媒和ダイナミクスの実験的観測と非経験的分子動力学法を用いた解析により、特に溶媒-溶媒間相互作用の溶媒和ダイナミクスに果たす役割の解明を主要なテーマとして研究を行う。

Outline of Final Research Achievements

The aim of this work is to understand the solvation dynamics induced by photoexcitation and chemical reactions based on the motion of individual solvent molecules. Ionization-induced solvent migration reactions were studied from the viewpoint of size dependence and internal energy dependence using gas-phase hydrated clusters.
It was found that the interaction between water molecules has a great impact on the solvent dynamics. Energy dependence of the IR spectra showed that the migration proceeds through complicated pathways depending on small changes in the internal energy and the hydrogen bonding structures found on the solvent migration pathways. Furthermore, product distribution that is contrary to the simple thermodynamic intuition was also found.

Academic Significance and Societal Importance of the Research Achievements

化学反応では、反応物だけでなくそれを取り囲む溶媒分子の運動が反応機構、速度に大きな影響を与える。しかし、溶媒分子は大量に存在するため、一つ一つの溶媒分子の運動に基づいて溶媒運動の役割を研究することはできていない。
本研究では、溶媒分子間の水素結合相互作用が溶媒運動のメカニズムにどのように影響するかの一端が初めて明らかにされた。特に、溶媒分子間の水素結合強度が溶媒運動のエネルギー依存性を大きく左右することが明らかになった。これらの結果は、化学反応機構の分子論的理解の基礎を与えるほか、理論計算のベンチマークとしても重要な意味を持つであろう。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Technische Universitaet Berlin(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Technische Universitaet Berlin/J.-M.-Universitaet Wuerzburg(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Technische Universitaet Berlin(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Real-time observation of photoionization-induced water migration dynamics in 4-methylformanilide?water by picosecond time-resolved infrared spectroscopy and <i>ab initio</i> molecular dynamics simulations2022

    • Author(s)
      Miyazaki Mitsuhiko、Kamiya Tairiku、Wohlgemuth Matthias、Chatterjee Kuntal、Mitri? Roland、Dopfer Otto、Fujii Masaaki
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 24 Issue: 1 Pages: 73-85

    • DOI

      10.1039/d1cp03327a

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Isomer-Selective Spectroscopy and Dynamics of Phenol-Ar<sub><i>n</i></sub> (<i>n</i> <= 5) Clusters2021

    • Author(s)
      Miyazaki Mitsuhiko、Sakata Yuri、Ono Megumi、Otsuka Remina、Ohara Ryuhei、Dopfer Otto、Fujii Masaaki
    • Journal Title

      The Journal of Physical Chemistry A

      Volume: 125 Issue: 46 Pages: 9969-9981

    • DOI

      10.1021/acs.jpca.1c04815

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Revealing the role of excited state proton transfer (ESPT) in excited state hydrogen transfer (ESHT): systematic study in phenol-(NH3)n clusters2021

    • Author(s)
      Jouvet Christophe, Miyazaki Mitsuhiko, Fujii Masaaki
    • Journal Title

      Chemical Science

      Volume: 12 Issue: 11 Pages: 3836-3856

    • DOI

      10.1039/d0sc06877b

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Excited state hydrogen transfer dynamics in phenol-(NH3)2 studied by picosecond UV-near IR-UV time-resolved spectroscopy2020

    • Author(s)
      Ishiuchi Shun-ichi、Kamizori Junko、Tsuji Norihiro、Sakai Makoto、Miyazaki Mitsuhiko、Dedonder Claude、Jouvet Christophe、Fujii Masaaki
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 22 Issue: 10 Pages: 5740-5748

    • DOI

      10.1039/c9cp06369b

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] MATI-IR分光法による4アミノベンゾニトリル-ArクラスターのAr原子移動反応の観測2022

    • Author(s)
      湯汲 紫音、中島 梨々香、宮﨑 充彦
    • Organizer
      第16回分子科学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] フェノール-アンモニアクラスターの励起状態プロトン共役電子移動ダイナミクスの解明2021

    • Author(s)
      岩田 健一郎、堤 拓朗、斉田 謙一郎、宮崎 充彦、武次 徹也
    • Organizer
      第23回理論科学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 光イオン化で誘起される4‐アミノベンゾニトリル‐水1:2クラスターの水分子マイグレーションの赤外分光による観測2021

    • Author(s)
      松野 里早子、宮﨑 充彦
    • Organizer
      第15回分子科学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] On the fly MD法によるフェノール‐アンモニア系の励起状態反応ダイナミクス2021

    • Author(s)
      岩田 健一郎、堤 拓朗、斉田 健一郎、宮﨑 充彦、武次 徹也
    • Organizer
      第15回分子科学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Real-time observation of twisted intramolecular charge transfer (TICT) and hydration dynamics in (p-cyanophenyl)pentamethyldisilane (CPDS)-water clusters by picosecond time-resolved IR spectroscopy2021

    • Author(s)
      Mitsuhiko Miyazaki, Haruki Ishikawa, and Masaaki Fujii
    • Organizer
      PACIFICHEM 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] フェノール‐アンモニアクラスターの励起状態プロトン共役電子移動反応に関する理論的研究2020

    • Author(s)
      岩田 健一郎、堤 拓朗、和田 諒、斉田 健一郎、宮﨑 充彦、武次 徹也
    • Organizer
      分子科学会オンライン討論会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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