Investigation on “Excimer” Formation Mechanism of Linear Oligofluorenes‐Functionalized Anthracenes by Using Transient Absorption Spectroscopy |
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| Authors: | Ying‐Hui Wang Lu Zou Zhi‐Hui Kang Cheng Qian Fuyin Wang Yu‐Guang Ma Ran Lu Hong Ji Han‐Zhuang Zhang |
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| Affiliation: | 1. Femtosecond Laser Laboratory, College of Physics, Jilin University, , Changchun, China;2. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, , Changchun, China;3. College of Chemistry, Jilin University, , Changchun, China |
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| Abstract: | 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. |
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