Yu Zi-Di, Lu Yang, Yao Ze-Fan, Wu Hao-Tian, Wang Zi-Yuan, Pan Chen-Kai, Wang Jie-Yu, Pei Jian
Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center of Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Angew Chem Int Ed Engl. 2024 Jun 10;63(24):e202405139. doi: 10.1002/anie.202405139. Epub 2024 May 10.
It remains challenging to comprehensively understand the packing models of conjugated polymers, in which side chains play extremely critical roles. The side chains are typically flexible and non-conductive and are widely used to improve the polymer solubility in organic solutions. Herein, a buffer chain model is proposed to describe link between conjugated backbone and side chains for understanding the relationship of crystallization competition of conductive conjugated backbones and non-conductive side chains. A longer buffer chain is beneficial for alleviating such crystallization competition and further promoting the spontaneous packing of conjugated backbones, resulting in enhanced charge transport properties. Our results provide a novel concept for designing conjugated polymers towards ordered organization and enhanced electronic properties and highlight the importance of balancing the competitive interactions between different parts of conjugated polymers.
全面理解共轭聚合物的堆积模型仍然具有挑战性，其中侧链起着极其关键的作用。侧链通常是柔性且不导电的，广泛用于提高聚合物在有机溶液中的溶解度。在此，提出了一种缓冲链模型来描述共轭主链与侧链之间的联系，以理解导电共轭主链与非导电侧链的结晶竞争关系。较长的缓冲链有利于缓解这种结晶竞争，并进一步促进共轭主链的自发堆积，从而提高电荷传输性能。我们的结果为设计具有有序结构和增强电子性能的共轭聚合物提供了一个新颖的概念，并突出了平衡共轭聚合物不同部分之间竞争相互作用的重要性。
