Development of a novel luminescent amphidynamic crystals based on NHC metal complexes

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K14637
• 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: Hokkaido University
• Principal Investigator: Jin Mingoo 北海道大学, 化学反応創成研究拠点, 准教授 (90827396)
• Project Period (FY): 2021-04-01 – 2023-03-31
• Keywords: Crystalline materials / molecular rotors / NHC metal complex / Photofunction in polymer

Outline of Final Research Achievements

In this study, we developed a novel luminescent crystalline molecular rotor by introducing copper(I) and gold(I) complexes possessing bulky NHC ligands around the rotational sites and (J. Am. Chem. Soc. 2021, 143, 1143). The molecular rotation of this complex can be rationally designed due to the steric effects exerted by the NHC ligands and the electronic effects of the metal complexes. Furthermore, it was revealed that this rotational behavior precisely modulates the intensity of solid-state luminescence. Additionally, we successfully introduced multiple rotational sites with different shapes and discovered their concerted motion within the solid state (Eur. J. Org. Chem. 2023, 26, e202201468).

Free Research Field

Crystal engineering with solid state functions

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた成果として、従来の分子結晶では困難であった、分子の回転運動を固体内で合理的にデザインできることが挙げられる。また、その回転挙動が、固体発光をデザインするのにも深く関与している点から、今後の新しい発光性センサー材料への応用が期待できる。