Affiliation:
1. Department of Chemical Science and Engineering Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8552 Japan
Abstract
AbstractMultiple emission colors in solid‐state organic fluorophores with the same main skeleton are essential for improving the performance of light‐emitting devices/materials. Specifically, emission in the red/near‐infrared region is of great importance in the biological field. Previously, we developed di‐bridged‐distyrylbenzeneDBDB[7]with high‐brightness solid‐state blue and aggregation‐induced emissions (AIE) by introducing the bridging structures of a seven‐membered ring into the vinylene groups of distyrylbenzene (DSB). Herein, we synthesizeMNDBDMeODB[7](1), which features substituted methoxy and malononitrile groups as donor and acceptor groups, respectively, inDBDB[7]. In solvents more polar than THF,MNDSDMeOB(3), which has the same main skeleton as1but without bridges, shows no emission in the solid state, whereas1exhibits highly bright red‐orange emission in the solid state owing to the suppression of intermolecular electronic interactions by the bridges and the AIE property. We also synthesizeMNDSD(EHO)B(2) in which the methoxy groups of3are replaced by ethylhexyloxy groups, thus disrupting the crystallinity of the molecule.2exhibits positive fluorescence solvatochromism and has a high fluorescence quantum yield in the solid state as a red‐emittingDSBderivative. The solid‐state emission properties of1and2will improve the applicability ofDSBs and functionalities of light‐emitting devices/materials.
Funder
Japan Society for the Promotion of Science
Subject
General Chemistry,Catalysis,Organic Chemistry
Cited by
5 articles.
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