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Development of photocatalytic methane transformation reactions using metallophilic interaction of d8 metal complexes

Research Project

Project/Area Number 19K15582
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 34010:Inorganic/coordination chemistry-related
Research InstitutionThe University of Tokyo

Principal Investigator

Murata Kei  東京大学, 生産技術研究所, 助教 (80755835)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords光触媒反応 / パラジウム錯体 / 金属-金属間相互作用 / ハロゲン化 / 金属ラジカル / 可視光 / 錯体化学 / 有機金属錯体 / メタン
Outline of Research at the Start

本研究では、d8金属錯体の集積体における金属-金属間相互作用を活用した、可視光駆動型C-H結合官能基化反応の開発を目的とする。第一に、集積体の光励起に伴い生成するMMLCT(Metal-Metal-to-Ligand Charge Transfer)励起状態の金属ラジカル性を利用して、有機基質のC-H結合切断反応を行う。第二に、同反応に伴い生成する有機金属種を、複核金属中心の協奏機能を利用して、種々の結合形成反応へと展開する。これら二つの反応を組み合わせることで、メタンのカップリング反応といった多様な不活性C-H結合の官能基化を実現する新しい光触媒サイクルを構築する。

Outline of Final Research Achievements

In this study, visible light-driven organic molecular transformations were explored using multinuclear d8 metal complexes with metallophilic interactions as catalysts. Through the screening of reaction conditions, the photochemical chlorine-atom abstraction reaction of a half-lantern type dinuclear palladium(II) complex possessing benzo[h]quinoline ligands was established. Using this reaction as a key elementary step, the visible light-driven C(sp2)-H bond chlorination reaction of benzo[h]quinoline was successfully developed, and the detailed reaction mechanisms were clarified by various experimental and theoretical analyses. Furthermore, the present principle was applied to the C(sp3)-H bond chlorination of 2-methylquinoline with the addition of an appropriate photoredox catalyst.

Academic Significance and Societal Importance of the Research Achievements

本研究において開発した可視光駆動型C-H結合塩素化反応は、可視光エネルギーによって活性な金属ラジカル種を発生させ、これを触媒分子の酸化・塩素化過程に用いる点に特色がある。その結果として、安価で取扱い容易な塩化炭化水素を塩素源に利用することが可能となり、従来法に比べ穏和な条件下での触媒反応が実現した。本原理はC(sp3)-H結合の塩素化にも適用でき、多様な炭化水素基質の変換に利用できる可能性がある。これらの研究成果は、金属-金属間相互作用を含む化学種を光触媒反応へ展開するための触媒設計指針を提示する点から、重要な意義をもつと考えられる。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2024 2023 2022 2021 2020 2019

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Open Access: 2 results,  Peer Reviewed: 7 results) Presentation (10 results) (of which Invited: 2 results)

  • [Journal Article] 均一系光触媒とともに2023

    • Author(s)
      村田慧
    • Journal Title

      CanAppleニュースレター

      Volume: 271

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] A Red‐Light‐Driven CO‐Releasing Complex: Photoreactivities and Excited‐State Dynamics of Highly Distorted Tricarbonyl Rhenium Phthalocyanines2022

    • Author(s)
      Wang Mengfei、Murata Kei、Koike Yosuke、Jonusauskas Gediminas、Furet Amaury、Bassani Dario M.、Saito Daisuke、Kato Masako、Shimoda Yuushi、Miyata Kiyoshi、Onda Ken、Ishii Kazuyuki
    • Journal Title

      Chemistry ‐ A European Journal

      Volume: 28 Issue: 48

    • DOI

      10.1002/chem.202200716

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Two-photon, red light uncaging of alkyl radicals from organorhodium(III) phthalocyanine complexes2022

    • Author(s)
      Murata Kei、Saibe Yuki、Uchida Mayu、Aono Mizuki、Misawa Ryuji、Ikeuchi Yoshiho、Ishii Kazuyuki
    • Journal Title

      Chemical Communications

      Volume: 58 Issue: 80 Pages: 11280-11283

    • DOI

      10.1039/d2cc03672j

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Distorted Porphyrins with High Stability: Synthesis and Characteristic Electronic Properties of Mono- and Di- Nuclear Tricarbonyl Rhenium Tetraazaporphyrin Complexes2021

    • Author(s)
      M. Wang, K. Murata, K. Ishii
    • Journal Title

      Chem. Eur. J.

      Volume: 27 Issue: 35 Pages: 8994-9002

    • DOI

      10.1002/chem.202005042

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Photochemistry of phthalocyanine based on spin angular momenta: a kinetic study of fluorescent probes for ascorbic acid2021

    • Author(s)
      T. Yokoi, K. Murata, K. Ishii
    • Journal Title

      Pure Appl. Chem.

      Volume: 93 Issue: 11 Pages: 1255-1263

    • DOI

      10.1515/pac-2021-0301

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Novel method for preparing stable near-infrared absorbers: a new phthalocyanine family based on rhenium(i) complexes2020

    • Author(s)
      Murata Kei、Koike Yosuke、Ishii Kazuyuki
    • Journal Title

      Chemical Communications

      Volume: 56 Issue: 89 Pages: 13760-13763

    • DOI

      10.1039/d0cc04625f

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Direct Observation of the S0 → T2 Transition in Phosphorescent Platinum(II) Octaethylporphyrin, Evidenced by Magnetic Circular Dichroism2020

    • Author(s)
      Ishii Kazuyuki、Wada Junya、Murata Kei
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 11 Issue: 22 Pages: 9828-9833

    • DOI

      10.1021/acs.jpclett.0c02469

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Molecular Ground-State Dissociation in the Condensed Phase Employing Plasmonic Field Enhancement of Chirped Mid-Infrared Pulses2019

    • Author(s)
      Ikki Morichika, Kei Murata, Atsunori Sakurai, Kazuyuki Ishii, Satoshi Ashihara
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1 Pages: 3893-3893

    • DOI

      10.1038/s41467-019-11902-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 有機金属錯体を用いる可視・近赤外光反応の開発2024

    • Author(s)
      村田慧
    • Organizer
      日本化学会第104春季年会(第12回女性化学者奨励賞受賞講演)
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Visible-Light-Driven C(sp3)-H Chlorination of 8-Methylquinoline by Pd Catalyst2022

    • Author(s)
      Kei Murata, Shaoting Liu, Takayuki Tsubata, Kazuyuki Ishii
    • Organizer
      第68回有機金属化学討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] 遷移金属錯体の可視光励起を基盤とする反応開発2022

    • Author(s)
      村田 慧
    • Organizer
      令和4年度第1回有機金属若手研究者の会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 二核パラジウム錯体触媒による可視光駆動型C(sp3)-H塩素化反応2022

    • Author(s)
      劉紹亭、津端崇元、村田慧、石井和之
    • Organizer
      東京大学生産技術研究所 第3回光物質ナノ科学研究センター研究報告会
    • Related Report
      2021 Research-status Report
  • [Presentation] 二核パラジウム錯体の光物性と光触媒的 C-H ハロゲン化反応2021

    • Author(s)
      劉紹亭, 津端崇元, 村田慧, 石井和之
    • Organizer
      第32回 配位化合物の光化学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Photocatalytic C-H Halogenation of N-Heterocyclic Aromatic Compounds by a Dinuclear Palladium Complex2021

    • Author(s)
      Shaoting Liu, Takayuki Tsubata, Kei Murata, Kazuyuki Ishii
    • Organizer
      錯体化学会第71回討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Photocatalytic C-H Chlorination of Quinolines by a Dinuclear Pd Complex2021

    • Author(s)
      Kei Murata, Takayuki Tsubata, and Kazuyuki Ishii
    • Organizer
      第67回 有機金属化学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 二核パラジウム錯体による芳香族N-複素環化合物の光触媒的C-Hハロゲン化反応2021

    • Author(s)
      劉紹亭、津端崇元、村田慧、石井和之
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Photocatalytic C-H Chlorination by Pd Dinuclear Complexes2019

    • Author(s)
      Takayuki Tsubata, Kei Murata, Kazuyuki Ishii
    • Organizer
      錯体化学会第69回討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] Pd二核錯体を用いた可視光駆動型光触媒的C-H塩素化反応2019

    • Author(s)
      津端崇元, 村田慧, 石井和之
    • Organizer
      第31回配位化合物の光化学討論会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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