Abstract A new carbazole-containing hyperbranched conjugated poly(phenylene vinylene) (Hyper-PCPPV) was synthesized through the Wittig polycondensation polymerization. Hyper-PCPPV has good solubility in common organic solvents and showed excellent thermal stability up to 425 °C with less than 5% weight loss. The photophysical properties of Hyper-PCPPV were investigated and compared with a carbazole-containing linear conjugated poly(para-phenylene vinylene) (Linear-PCPPV). An absorption maximum of Hyper-PCPPV film was determined at 353 nm which was far blue shifted than that of Linear-PCPPV (403 nm). Hyper-PCPPV showed blue photoluminescence (PL) peak at 448 nm. In addition, Hyper-PCPPV exhibited almost no excimer or aggregate emission peaks even when the polymer film was annealed at 80 °C for 30 min in air condition.

中文翻译：

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含咔唑超支化共轭聚亚苯基亚乙烯基的合成及发光性能

摘要 通过Wittig缩聚反应合成了一种新型的含咔唑超支化共轭聚亚苯基亚乙烯基(Hyper-PCPPV)。Hyper-PCPPV 在常见有机溶剂中具有良好的溶解性，并且在高达 425 °C 的温度下表现出优异的热稳定性，重量损失小于 5%。研究了 Hyper-PCPPV 的光物理性能，并将其与含咔唑的线性共轭聚（对亚苯基亚乙烯基）（Linear-PCPPV）进行了比较。Hyper-PCPPV 薄膜的吸收最大值在 353 nm 处确定，这比 Linear-PCPPV (403 nm) 蓝移得多。Hyper-PCPPV 在 448 nm 处显示蓝色光致发光 (PL) 峰。此外，即使聚合物薄膜在空气条件下在 80°C 下退火 30 分钟，Hyper-PCPPV 也几乎没有出现准分子或聚集体发射峰。