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Long‐Range Exciton Migration in Coassemblies: Achieving High Photostability without Disrupting the Electron Donation of Fluorene Oligomers
Author(s) -
Cheng Chuanqin,
Gong Yanjun,
Guo Yongxian,
Cui Linfeng,
Ji Hongwei,
Yuan Hong,
Jiang Lang,
Zhao Jincai,
Che Yanke
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202012474
Subject(s) - fluorene , exciton , photochemistry , oligomer , materials science , acceptor , range (aeronautics) , fluorescence , electron , chemistry , optoelectronics , polymer , polymer chemistry , optics , physics , quantum mechanics , composite material , condensed matter physics
In this work, photostable coassemblies from a nonphotostable fluorene oligomer (the energy donor) and a photostable oligomer (the energy acceptor) are fabricated. Long‐range exciton migration over a net distance of about 370 energy‐donor molecules to energy acceptors is demonstrated in such coassemblies. The fast and long energy migration allows harvesting of the excitation energy of energy donors by embedding a small number of energy acceptors for photostability enhancement. Importantly, embedding a small number of energy acceptors in coassemblies causes a negligible negative influence on the electron donation of energy donors that are desired in practical applications. The advantages of the coassemblies fabricated, that is, high photostability without disrupting the electron donation of energy donors, are well illustrated in fluorescence detection of trace explosives where prolonged working life and improved detection capacity are achieved.