Enhancement of Catalytic Activity of Dinuclear Metal Complex Catalyst Based on Optimization of Total Charge

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15587
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 34010:Inorganic/coordination chemistry-related
• Research Institution: Osaka University
• Principal Investigator: Morimoto Yuma 大阪大学, 工学研究科, 助教 (20719025)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 二核錯体 / 自己集積挙動 / 酸化反応 / 高原子価化学種 / 過酸化水素 / 電子スピン共鳴

Outline of Final Research Achievements

A dinickel(III) di-mu-oxide complex was generated under low-temperature (-80°C) conditions, and the addition of various carboxylates to the solution led to the formation of their adduct, which were confirmed by various spectroscopic techniques. The oxidation activity of the adduct was found to increase by a factor of about 10 compared to the initial complex. Although we could not clarify the effect of anion on the TOF of nickel complex catalyst in the benzene hydroxylation reaction, which was planned at the beginning of the research project, it became clear that the anion species have a significant effect on the electronic state of the dinuclear complex, and we have obtained guidelines for future catalyst improvement.

Free Research Field

錯体化学

Academic Significance and Societal Importance of the Research Achievements

本テーマで研究対象とした二核高原子価金属ビスミューオキシド種は高い酸化力を持ち、種々の酸化プロセスで酸化活性種として機能している可能性のある化学種である。しかしこの化学種は、安定性が極めて低いため、その物理化学的性質や反応性の詳細はわからないところが多い。低温条件でこの化学種を補足することで新たに明らかになった、二核高原子価金属ビスミューオキシド種の化学的な挙動についての情報は、将来的により効率のよい触媒反応系の構築に資する可能性がある。