文献类型：期刊文献

英文题名：Rigid-Rod Polybenzoxazoles Containing Perylene Bisimide: Synthesis, Structures and Photophysical Properties

作者：Xu, Xiao-Hui[1];Liu, Xiao-Yun[1];Zhuang, Qi-Xin[1];Han, Zhe-Wen[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, Shanghai 200237, Peoples R China

年份：2010

卷号：116

期号：1

起止页码：455

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20100512680640);WOS:【SCI-EXPANDED(收录号:WOS:000274545000056)】；

基金：Contract grant sponsor: National Natural Science Foundation of China (NSFC); contract grant number: 50703010.

语种：英文

外文关键词：perylene bisimide; benzoxazole; synthesis and characterization; fluorescence spectra

摘要：A novel perylene bisimide dye bearing carboxylphenylene substituents on the imide N atoms was synthesize,, and four conjugated copolymers containing different contents of perylene bisimide dye were synthesized via PPA/P2O5 copolymerization method. The structures of the four copolymers were characterized by FTIR, elementary analysis, H-1-NMR and XRD. The copolymers showed good thermal stabilities but poor solubilities due to the high rigidity of the backbone. The photophysical characteristics of the copolymers were investigated by UV-Vis and PL spectra in Solutions and films. Because of the conformational change of perylene bisimide chromophore, the absorptions of perylene bisimide core in copolymers showed a large blue-shift (56 nm) compared to that of the perylene monomer. In PL experiments, when exciting the benzoxazole, an obvious fluorescent quenching was observed in all copolymers, which can be attributed to the energy transfer from benzoxazole units to perylene bisimide fragments and fluorescence quenching. With increasing perylene content, the copolymers turned to layered and friable. The XRD test showed that the interchain distances increased slightly with increasing perylene content. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 116:455-460,2010