含联苯PPV类共轭聚合物的合成及荧光性能研究

在催化剂聚氯乙烯-四乙烯五胺负载钯配合物(PVC-TEPA-Pd)的作用下,利用Heck反应,二碘联苯与苯乙烯反应可以得到4,4′-二苯乙烯基联苯。进一步用二碘联苯和二乙烯基苯反应可以成功地将联苯基元引入聚合物主链,得到一种新型的含联苯结构的PPV类共轭聚合物,通过红外光谱对聚合物结构进行了表征,并对聚合物的荧光性能进行了研究,发现其荧光发射光谱峰位于500nm,与4,4′-二苯乙烯基联苯荧光发射光谱峰相比,发生了明显的红移。由于分子结构中存在较大共轭体系,两种物质在多种溶剂中的溶解性均较差。

Synthesis and Fluorescence Property of Conjugated Polymer PPV Containing Biphenyl

4,4-disubstituted-styrylbiphenyl was synthesized by Heck reaction of 4.4′-diiondobipheny with divinylbenzene under the catalysis of PVC-TEPA-Pd. Furthermore, a novel conjugated polymer PPV containing biphenyl was obtained via the reaction of 4.4′-diiondobipheny with divinylbenzene in the presence of the same catalyst. The structure of the polymer was characterized by IR spectra. The solid sample of conjugated polymer PPV containing biphenyl showed the fluorescence emission peaks at 500nm. Compared with 4,4-disubstituted-styrylbiphenyl, the fluorescence emission peak of the conjugated polymer shifts to a longer wavelength region. The solubilities of these two substances were poor in variesl solvents because of the high conjugated systems in their molecular structures.