摘要
设计并合成了一系列共轭高分子———聚亚苯基苯并二唑 (PBO) ,聚亚乙烯基苯并二唑 (PBOV)和聚亚丁二唑 (PBODV) ,并对它们进行了表征 .用紫外吸收光谱和荧光光谱对聚合物的溶液和薄膜进行了详细的研究 ,研究结果表明分子结构中双键的引入可以降低聚合物的光带能隙 ,λmax从PBO溶液的 4 2 8 5nm (Eg=2 76eV) ,到PBOV溶液的 4 80 5nm (Eg=2 4 6eV) ,再到PBODV溶液的 4 96 0nm (Eg=2 38eV) .共轭程度的增加使得聚合物溶液更容易发生集聚从而导致荧光自熄灭 .
New conjugated rigid-rod polymers, poly(p-phenylene-benzobisoxazole) (PBO) poly (benzobiso-xazole-2,6-diylvinylene) (PBOV) and poly (benzobisoxazole-2, 6-diyldivinylene) (PBODV) were synthesized, and their molecular structures, thermal stabilities and morphology of polymers were determined by FTIR, H-1-NMR, TGA and WAXD respectively. The photophysical properties of polymer/MSA solutions were investigated by UV and photoluminescence spectroseopies. The UV spectra and photoluminescence spectra of these new polymers in methanesulfonic acid suggest that the absorption spectra and optical bandgap of PBODV and PBOV have a red shift compared with those of the conjugated PBO. That is caused by the different conjugation structures in molecular chains of PBO, PBOV and PBODV.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2005年第1期86-92,共7页
Acta Polymerica Sinica
基金
8 63计划资助项目 (项目号 2 0 0 2AA3 0 5 10 9)
上海市重点学科建设资助项目
