Synthesis and characterization of (9,9-bis(dodecafluoroheptylpropanoate)-2,7-fluorene)-co-2,7-(9,9- dioctylfluorene) copolymers

被引：0
|
作者：
Jia Z. [1 ]
Wu D. [1 ]
Li J. [1 ]
Ren Q. [1 ]
Wang C.-Y. [1 ]
机构：
[1] Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2019年 / 33卷 / 05期
关键词：
Excimer; Fluorescence spectrum; Fluorine-containing polyfluorenes; Hydrophobic polyfluorene; Suzuki coupling;
D O I：
10.3969/j.issn.1003-9015.2019.05.024
中图分类号：
学科分类号：
摘要：
2,7-dibromo-9,9-bis(dodecafluoroheptylpropanoate)fluorene (FDFHP) was synthesized by Michael addition reaction, and fluorine-containing polyfluorenes (PF8FDFHP) with different contents of FDFHP structural units were synthesized through Suzuki Coupling. The structure and properties of the polymers were characterized by FTIR and 1H-NMR, et al. The results show that the hydrophobicity of the copolymers increases but HOMO and LUMO energy levels are not affected by introducing fluorine-containing side chains. The fluorescent emission peak at 440 nm disappeared, and a new fluorescent emission peak at 500~600 nm appeared after the introduction of the fluorine-containing side chain. This new emission peak was caused by the formation of excimers due to denser packing between the backbones of polyfluorene, which was induced by the introduction of the fluorine-containing side chain and the crystallization of the side chain. This phenomenon was further investigated by fluorescence spectra of different concentrations of PF8FDFHP in THF and also DSC analysis. © 2019, Editorial Board of "Journal of Chemical Engineering of Chinese Universities". All right reserved.
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页码：1213 / 1222
页数：9
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