Development of Photo-functional Materials Based on Interactions between Chelete and Nonchelate Ligands of Typical Element Complexes

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K14673
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 35010:Polymer chemistry-related
• Research Institution: Kyoto University
• Principal Investigator: Ito Shunichiro 京都大学, 地球環境学堂, 助教 (30875711)
• Project Period (FY): 2021-04-01 – 2023-03-31
• Keywords: 典型元素錯体 / 発光 / 合成化学 / 錯体化学 / 高分子化学

Outline of Final Research Achievements

Luminescent complexes composed of typical elements and organic moieties exhibit superb functional properties such as phosphorescence and stimuli responsiveness. Their luminescence properties have been tuned by modulating their chelate ligands of organic pi-electron systems. In contrast, it has not been clarified how to adjust their properties by altering the non-chelate ligands on the central element. Herein, this work has focused on developing new strategies for functionalizing complexes based on electronic interactions between chelate and non-chelate ligands. It has been demonstrated that the energy gap between these ligands, stereoelectronic effects, and the bonding nature between ligands and a metal atom should play a key role in modulating the photophysical properties of complexes.

Free Research Field

有機・高分子合成化学、材料化学、光化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、従来用いられてこなかった錯体の物性制御手法である、非キレート配位子に着目し、これとキレート配位子との相互作用を精密に調整することで錯体の物性を制御できることを明らかとした。これは、本研究で中心的な対象とした光機能性のみならず、触媒機能や電気電子物性の制御などにも広く応用展開できる手法であり、物質探索の可能性を広く拡張するという点で、学術的にも産業的にも意義深いものである。