A molecular structure and crystallization correlation study of pyromellitic diimide-based conjugated copolymers
作者:Ming-Chia Tsai、Ja-Wei Liu、Ping-Tsung Huang
DOI:10.1002/jccs.201700440
日期:2018.7
diimide(PMDI)‐based polymers—poly(pyromellitic diimide‐co‐bithiophene) [poly(PMDI‐BTh)], poly(pyromellitic diimide‐co‐tetrathiophene) [poly(PMDI‐TTh)], and poly(pyromellitic diimide‐co‐benzodithio‐ phene) [poly(PMDI‐BDTTh)]—are synthesized to study the influence of different thiophene‐containing electron‐donating groups on the crystallizability of PMDI‐based conjugated polymers. Computer simulation
三种基于均苯四甲酸二酰亚胺(PMDI)的聚合物-聚(均苯四甲酸二酰亚胺-共-噻吩)[poly(PMDI-BTh)],聚(均苯四甲酸二酰亚胺-共-四噻吩)[poly(PMDI-TTh)]和聚(均苯四甲酸)合成了二酰亚胺-共苯并二噻吩[poly(PMDI-BDTTh)],以研究不同的含噻吩供电子基团对基于PMDI的共轭聚合物结晶性的影响。使用密度泛函理论(DFT)[高斯B3LYP / 6–31 + G(d,p)]进行的计算机模拟表明,聚(PMDI-BDTTh)具有比其他两种共聚物更平坦的分子结构。聚(PMDI-BDTTh)的粉末XRD衍射实验显示,约2θ= 6.0°处有一个衍射峰,但聚(PMDI-BTh)和聚(PMDI-TTh)均未出现衍射峰。尽管PMDI是有利于分子聚集的平面结构,