含联吡啶结构单元的超支化发光聚合物的合成

Synthesis of a bipyridyl-containing hyperbranched light-emitting polymer

利用Wittig-Horner方法合成了一种新的联吡啶基π-共轭分子,将其作为n-型发光单元(A2单体),同时将溶解性较好的丁氧基二取代的二苯乙烯基苯作为p-型发光单元(A′2单体),采用A2+A′2+B4的路线合成了一类新型的部分共轭型超支化发光聚合物。采用红外、核磁共振等手段对产物的结构进行了初步表征,用差示扫描量热仪(DSC)、热失重仪(TGA)、紫外-可见分光光度计(UV-Vis)和荧光分光光度计等仪器对产物的性能进行了研究。结果表明,相比于同类的线性聚合物聚对亚苯基乙烯,该聚合物具有优良的热稳定性、更高的玻璃化转变温度,在氯仿,四氢呋喃等溶剂中均具有优良的溶解性能,尤其是呈现出特有的光物理性能。

A partially conjugated hyperbranched light-emitting polymer was obtained by polymerization of an ntype fluorescent bipyridyl （A2 monomer ）, a p-type fluorescent dibutoxy substituted distyrylbenzene （A2 monomer） and branched B4 monomer. The polymer was characterized by FT-IR and UV-Vis spectroscopy and fluorescence spectrophotometry and its thermal properties were investigated by DSC and TGA. It was found that the polymer displays better thermal stability, higher Tg, and higher fluorescence quantum yield compared with its linear counterparts, such as PPV. In addition, the polymer exhibits good solubility in many common organic solvents, and unique photophysical properties.