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Investigation on “Excimer” Formation Mechanism of Linear Oligofluorenes‐Functionalized Anthracenes by Using Transient Absorption Spectroscopy
Author(s) -
Wang YingHui,
Zou Lu,
Kang ZhiHui,
Qian Cheng,
Wang Fuyin,
Ma YuGuang,
Lu Ran,
Ji Hong,
Zhang HanZhuang
Publication year - 2013
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.12159
Subject(s) - excimer , photoexcitation , photochemistry , molecule , fluorescence , ultrafast laser spectroscopy , absorption (acoustics) , spectroscopy , chemistry , quantum yield , absorption spectroscopy , fluorescence spectroscopy , materials science , excited state , organic chemistry , atomic physics , optics , physics , quantum mechanics , composite material
We study the photophysical characters of two oligofluorenes‐functionalized anthracenes molecules with different fluorine‐vinylene ( FV ) units, which exhibits that “excimer” state appears in the solution after photoexcitation. The dynamic data shows that two mechanisms are responsible for the generation of “excimer”. The fast one is controlled by the arene‐arene interaction between molecules and the slow one is influenced by the diffusion motion of molecules. Increasing the number of FV units may suppress the DM ‐dependent “excimer” and enhance the yield of intrinsic fluorescence, which finally improves the fluorescence property of molecules in solution.