Selective Formation of Twisted Intramolecular Charge Transfer and Excimer Emissions on 2,7-bis(4-Diethylaminophenyl)-fluorenone by Choice of Solvent

Molecules

Masayuki Shigeta¹  Mifumi Morita¹ 

[1] ¹Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan ²PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan

关键词: twisted intramolecular charge transfer (TICT);    excimer;    intermolecular charge transfer;    fluorenone;    donor acceptor dye;   

DOI  :  10.3390/molecules17044452

来源: mdpi

【 摘 要 】

We designed and synthesized a donor-acceptor-donor dye consisting of a 2,7-disubstituted fluorenone with diethylaminophenyl moieties present as strong electron donating groups. Switching between twisted intramolecular charge transfer (TICT) emission and excimer emission was achieved, with no ground state changes, by simply changing the solvent used. In a nonpolar solvent, excimer emission was observed; with increasing polarity, the emission gradually disappeared, and the TICT emission appeared.

【 授权许可】

CC BY   
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