文献类型：期刊文献

英文题名：Poly(benzobisoxazole divinylene): synthesis, photophysical properties, and electron paramagnetic resonance studies

作者：Guo, Peiying[1]; Wang, Shanfeng[1,3]; Wu, Pingping[1]; Han, Zhewen[1,2]

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：2004

卷号：45

期号：6

起止页码：1885

外文期刊名：POLYMER

收录：;EI(收录号：2004098041676);WOS:【SCI-EXPANDED(收录号:WOS:000189214700018)】；

语种：英文

外文关键词：polycondensation; photophysics; conjugated polymers

摘要：A new conjugated rigid-rod polymer, poly(benzobisoxazole divinylene) (PBODV) has been synthesized and characterized using FTIR, H-1 NMR, viscometry, wide-angle X-ray diffraction, and thermogravimetric analysis. UV absorption spectroscopy and photoluminescence spectroscopy were also used to investigate the photophysical properties of these polymers in methanesulfonic acid in detail. The results show that the introduction of trans-vinylene segments into the poly(benzobisoxozale)s backbone narrowed the optical bandgap of this class of polymers. The excitation and emission spectra change significantly with the concentration both in shape and the peak positions, indicating the formation of aggregates in solution. Furthermore, electronic paramagnetic resonance studies show the intrinsic paramagnetic defects in the PBODV, which can be interpreted using a soliton-antisoliton model. (C) 2004 Elsevier Ltd. All fights reserved.