Development of photo-electronic-magnetic functions by anisotoropic assembly of luminescent open-shell molecules

2019 Fiscal Year Final Research Report

• Project/Area Number: 17H04870
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Inorganic chemistry
• Research Institution: Institute for Molecular Science (2018-2019); The University of Tokyo (2017)
• Principal Investigator: Kusamoto Tetsuro 分子科学研究所, 生命・錯体分子科学研究領域, 准教授 (90585192)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: ラジカル / 発光 / スピン / 磁性

Outline of Final Research Achievements

I have developed several organic radicals possessing high photostability and luminescent properties. In previous studies, the decomposition of radicals upon photoirradiation is a bottleneck to investigate their luminescent properties. In this study, I have prepared a novel luminescent radical bisPyTM whose photostability is higher than that of TIPS pentacene, known as a photostable closed-shell molecule. Furthermore, I have revealed for the first time that the emission properties of radicals can be controlled by applying magnetic field. This is the first realization of interplay between spin and luminescence in radicals.

Free Research Field

分子物性化学

Academic Significance and Societal Importance of the Research Achievements

ラジカルの発光特性に着目した研究例は極めて限られており、その特徴や発現メカニズムは十分に理解されていなかった。本研究ではラジカルの発光および非発光過程の要因を明らかにすることができた。また開殻電子系を有するラジカルが示す発光は、通常の閉殻分子の発光とは異なる特徴があることを実験的に明らかにした。これらは分子科学や光物性科学に新たな知見を与える成果であり、学術的に大きな意義を有する。