Development of novel carbon source recycle reaction driven by visible light with water as electron source

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02735
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 34010:Inorganic/coordination chemistry-related
• Research Institution: Kyushu University
• Principal Investigator: Shimakoshi Hisashi 九州大学, 工学研究院, 教授 (00284539)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 酸化チタン / 光触媒 / ビタミンB12 / 有機塩素化合物 / 炭素資源リサイクル

Outline of Final Research Achievements

In this study, as a method of recycling carbon resources, we developed a carbon resource recycling reaction in which organic halogen compounds, which are environmental pollutants, are dehalogenated and the remaining carbon part is used as a carbon source for useful compounds. As a method for this, we focused on the excellent properties of natural metal enzymes, synthesized a model complex that reproduces its function, and combined it with a photocatalyst to synthesize an environment-friendly catalyst that uses light energy as a driving force. We also succeeded in developing a hybrid catalyst that combines two types of photosensitizers and a vitamin B12 complex that serves as a catalyst site as a catalyst system that introduces a two-step photoexcitation Z scheme mechanism.

Free Research Field

錯体化学

Academic Significance and Societal Importance of the Research Achievements

近年、天然酵素に光応答性、耐久性、外部刺激応答性などの新たな機能を付加したバイオインスパイード型人工酵素の研究が活発に行われている。金属酵素を例にすると、活性中心のモデルとなる金属錯体を電極、酸化物半導体および光増感剤などと複合化することで、電気化学的または光化学的に駆動する人工金属酵素の研究が目覚ましく発展している。一方で、これらの研究から、実用化に直結する汎用性の高い反応開発に至った例が未だ少ないのも現状である。本研究は、このような現状を打破すべく、バイオインスパイード型の触媒研究を一歩前に進め、社会実装に向けた新規で有用な炭素資源リサイクル型の物質変換システムの開発を行った。