外围带咔唑基的联苯桥联PPV齐聚物的稳定性  

Stability of a PPV Oligomer with Central Biphenyl Bridge and Peripheral Carbazole Substituents

作　　者：宋学良[1] 金佳科[1] 董浩宇[1] 唐本忠[1] 孙景志[1] 

机构地区：[1]浙江大学高分子科学与工程学系教育部高分子合成与功能构造重点实验室,杭州310027

出　　处：《高等学校化学学报》2006年第11期2209-2212,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50573065)资助

摘　　要：设计合成了外围带咔唑基团的联苯桥联齐聚对苯撑乙烯撑衍生物,用核磁共振氢谱、质谱和元素分析对其结构和纯度进行了表征.热分析测试结果表明:该化合物具有良好的化学结构稳定性和相态稳定性.玻璃化转变温度为142.05℃,热失重开始温度为306℃.退火处理前后的旋涂薄膜的吸收光谱的性状和X射线衍射数据说明该化合物的固体薄膜为无定形薄膜,而且高温下退火4 h没有明显变化.研究结果表明,以联苯桥联结构为中心,外围修饰大体积的咔唑基团的分子设计不仅在减弱分子聚集和抑制π-π相互作用方面取得了良好效果,而且保持了联苯桥联DSB衍生物的结构稳定性.An oligo（phenylene vinylene） with central biphenyl bridge and peripheral carbazole founctionalities was synthesized. The structure and purity were characterized by using ^1H NMR, MS and elementary analysis techniques. Thermal analysis data indicated that the obtained compound possessed both high chemical and morphological stability. The glass transition temperature was 142.05 ℃ ; the mass-loss temperature started at 306 ℃. The observed absorption features and X-ray diffraction patterns suggested an amorphous state of the spin-coating films, and the annealing treatment at 80 ℃ for 4 h did not change the amorphous property. The results above showed that the molecular design of introducing a central biphenyl bridge and bonding peripheral bulky carbazole functionalities can not only effectively decrease the aggregation of chromophores but also keep the stability of biphenyl bridged DSB derivatives.

关 键 词：联苯桥联 咔唑 固体薄膜 热稳定性 

分 类 号：O631[理学—高分子化学] O543[理学—化学]