文献类型：期刊文献

英文题名：Spectral modulation and exciton migration in thiophene-based polybenzobisoxazole random copolymers with donor-acceptor architectures

作者：Chen, Yan[1]; Wang, Shanfeng[1,2]; Zhuang, Qixin[1]; Li, Xinxin[1]; Wu, Pingping[1]; Han, Zhewen[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2005

卷号：38

期号：23

起止页码：9873

外文期刊名：MACROMOLECULES

收录：;EI(收录号：2005499524680);WOS:【SCI-EXPANDED(收录号:WOS:000233225600059)】；

语种：英文

外文关键词：Absorption - Aromatic compounds - Photoluminescence - Polymers - Quantum theory - Sulfur compounds - X ray diffraction

摘要：A series of thiophene-based polybenzobisoxazole copolymers (PBO-co-PBOT) with different ratios of thiophene and phenylene moieties were synthesized and characterized. The interplay between morphology and photophysical properties of the copolymers as well as their parent polymers was discussed using wide-angle X-ray diffraction (WAXD), UV-vis absorption, photoluminescence (PL) spectra and time-resolved PL decay dynamics. All the polymers were lyotropic as indicated by the stir opalescence in polycondensation despite the nonlinearity in thiophene-containing polymers. The results show that the PBO and PBOT blend show a much enhanced quantum yield of photophysical processes to indicate efficient interchain energy transfer.