Elucidation of the excited state structure of emissive copper (I) complexes

2021 Fiscal Year Final Research Report

• Project/Area Number: 17K05801
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: Gunma University
• Principal Investigator: Asano Motoko 群馬大学, 大学院理工学府, 教授 (80201888)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Keywords: 励起状態 / 遅延けい光 / りん光輻射速度 / 配位子依存性 / 温度依存性

Outline of Final Research Achievements

The electronic excited structure and spin sates of helerpleptic copper(I) complexes bearing diimine and diphosphine ligands were investigated together with their luminescence properties. These copper(I) complexes exhibit cooperatively phosphorescence and delayed fluorescence. In this project, particularly, a novel approach to analyze excited structure was proposed based on temperature dependence on emission lifetimes and quantum yields in solutions. It was found that relaxation processes were sensitively influenced by the ligands, and it enables control of photo-functionality of Cu(I) complexes.

Free Research Field

光物理化学　錯体化学

Academic Significance and Societal Importance of the Research Achievements

励起一重項と三重項からの２つの状態からの発光を起こす励起構造の新しい解析方法の提案は、Cu（I）錯体のみならず、種々の物質の解析に広く適用することができものであり意義深い。また、一連の銅錯体は高い発光性をもち、光機能性錯体としての応用が期待されているが、本研究は、配位子の電子構造をもとに発光特性の傾向を予測可能とし、機能発現にむけた分子設計において指針を与えるものと期待できる。