Development of a photoinduced electron transportation system by using liquid-liquid phase migration

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K14769
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: Kyoto University
• Principal Investigator: Nakada Akinobu 京都大学, 工学研究科, 講師 (20845531)
• Project Period (FY): 2022-04-01 – 2024-03-31
• Keywords: 光触媒 / 人工光合成 / 光電子移動 / 金属錯体 / 半導体

Outline of Final Research Achievements

In this research, we constructed a new photocatalytic system in which the reaction field is separated by conducting the reduction reaction to produce useful products and the oxidation reaction of water in different phase-separated solvents, and we developed an artificial photosynthesis reaction using water as an electron source. We demonstrated a reductive coupling reaction in the organic phase using a phase-transfer electron mediator and a photocatalytic water oxidation reaction in the aqueous phase. In this reaction, the mediator that donates electrons moves to the aqueous phase, accepts the electrons necessary for water oxidation, and functions as a phase-transfer electron mediator that moves back to the organic phase.

Free Research Field

光触媒化学

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した光触媒システムは、反応溶液の相分離を利用して酸化と還元反応の反応場を分離することで選択的な光電子伝達経路を与える「仕組み」を与えるものである。今後、本システムのさらなる改良により、電極や導線を必要としない水を電子源とした様々な分子変換反応の実現に向けた光触媒システムの提案に結びつくものと期待される。