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High‐performance hybrid polymer based on bis(alkoxy) ortho‐substituted para‐phenylene
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-11-07 , DOI: 10.1002/pol.20200640
Shouli Ming 1 , Hui Zhang 2 , Kaiwen Lin 3 , Fengxing Jiang 4 , Zhiyuan Li 1 , Peipei Liu 4 , Jingkun Xu 1, 4 , Guangming Nie 1 , Xuemin Duan 4
Affiliation  

Compared to bis(alkoxy) group para‐substituted para‐phenylene (p‐phenylene) widely used as spacer, the isomer ortho‐substituted p‐phenylene is rarely studied in constructing organic optoelectronic materials. In this manuscript, bis(hexyloxy) group ortho‐substituted p‐phenylene was used to construct hybrid thienylene‐phenylene polymer poly(EDOT‐o‐BE). The density functional theory study indicated the dihedral angles between thienylene and phenylene are 15° for ortho‐substituted EDOT‐o‐BE and 10° for para‐substituted EDOT‐p‐BE. Poly(EDOT‐o‐BE) exhibits the little potential difference between cathodic (0.61 V) and anodic (0.65 V) peaks even at the high potential scan rate, different from bis(alkoxy) para‐substituted control polymer poly(EDOT‐p‐BE). Moreover, the free‐standing poly(EDOT‐o‐BE) film displays better stability than poly(EDOT‐p‐BE) due to the little degradation of molecular chains. Compared to poly(EDOT‐p‐BE), poly(EDOT‐o‐BE) possesses higher ionic transport and different molecular aggregation. These results indicate the positions of side chains have important influence on the properties of conjugated polymer, including molecular configuration, aggregation state, film quality, electrochemical behavior and optical absorption.

中文翻译:

基于双(烷氧基)邻位取代对亚苯基的高性能杂化聚合物

与广泛用作间隔基的双(烷氧基)基对位取代的撑(p- phenylene)相比,在构建有机光电材料时很少研究异构体邻位取代的对苯撑。在本手稿中,使用双(己氧基)基邻位取代的苯撑苯来构建杂化的噻吩-苯撑聚合物聚(EDOT- o- BE)。密度泛函理论研究表明为亚噻吩基和苯基是15°之间的二面角-取代的EDOT- ö -BE和10°为对位-取代的EDOT- p-是。聚(EDOT- o- BE)即使在高电位扫描速率下,在阴极(0.61 V)和阳极(0.65 V)峰之间也显示出很小的电位差,这与双(烷氧基)对位取代的对照聚合物聚(EDOT- p)不同-是)。此外,由于分子链几乎没有降解,因此独立的聚(EDOT- o- BE)膜比聚(EDOT- p - BE)膜表现出更好的稳定性。与poly(EDOT‐ p‐ BE)相比,poly(EDOT‐ o‐BE)具有更高的离子传输和不同的分子聚集。这些结果表明侧链的位置对共轭聚合物的性能具有重要影响,包括分子构型,聚集状态,膜质量,电化学行为和光吸收。
更新日期:2020-12-02
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