Crystal Engineering of Angular-Shaped Heteroarenes Based on Cyclopenta[<i>b</i>]thiopyran for Controlling the Charge Carrier Mobility
作者:Yanjun Qiao、Longfei Yang、Jiangyu Zhu、Chuan Yan、Dongdong Chang、Ning Zhang、Gang Zhou、Yan Zhao、Xuefeng Lu、Yunqi Liu
DOI:10.1021/jacs.1c04576
日期:2021.7.28
Cyclopenta[b]thiopyran, isomeric to benzo[b]thiophene while isoelectronic to azulene, is involved as a building block to construct soluble organic semiconductors for field-effect transistors. Two series of angular-shaped heteroarenes based on cyclopenta[b]thiopyran, that is, Cn-SS (n = 4, 6, 8, 10) with different linear alkyl groups and C8-SS-Clm (m = 2, 3, 4) with chlorides substituted at different
环戊二烯[ b ] 噻喃与苯并[ b ] 噻吩同分异构体,而与芴烯等电子,可作为构建场效应晶体管的可溶性有机半导体的基石。基于环戊[ b ]噻喃的两个系列角形杂芳烃,即具有不同直链烷基的C n -SS ( n = 4, 6, 8, 10)和C 8 -SS-Cl m ( m= 2, 3, 4) 在不同位置被氯化物取代,已直接合成。获得的七个 S-杂芳烃表现出有趣且相似的光物理和电化学特性,例如近红外吸收和最高占据分子轨道的高能级。然而,具有相同π-共轭骨架的S-杂芳烃表现出完全不同的分子堆积结构,这被证明是电荷载流子迁移率的关键决定因素。一旦烷基侧长度的工程,在最高的空穴迁移率Ç Ñ -SS系列是为实现Ç 8 -SS(1.1厘米2 V -1小号-1) 具有中等烷基长度。在C 8 -SS上进一步掺入氯化物导致缩短的分子间 H…S 接触和面间距。最有趣的是,当含氯的氯仿和氯苯用作结晶溶剂时,由于