Isomerically Fused Benzo[<i>i</i>]dithiophenephenazine and Benzo[<i>i</i>]diselenophenephenazine: Synthesis, Crystal Packing, and Density Functional Theory Calculations
作者:Di Tian、Zhiying Ma、Luomeng Gu、Congsheng Zhou、Chunli Li、Zhihua Wang、Hua Wang
DOI:10.1021/acs.cgd.0c00290
日期:2020.7.1
Creating functional organic semiconductors with cofacial molecular packing requires balancing several competing types of noncovalent intermolecular interactions. Through the synthesis of a series of fused benzo[i]dithiophenephenazine and benzo[i]diselenophenephenazine compounds, we demonstrate that it can encourage cofacial packing and thus increase the amount of π-orbital overlap through the introduction
创建具有界面分子堆积的功能性有机半导体需要平衡几种竞争类型的非共价分子间相互作用。通过合成一系列稠合的苯并[ i ]二噻吩吩嗪和苯并[ i]]二硒吩吩嗪化合物,我们证明它可以通过将柔软的可极化和富电子的硫/硒原子引入缺电子的含氮杂芳族化合物中来促进界面堆积,从而增加π轨道重叠量。在某些异构体中,硫属元素在正确的位置与三甲基甲硅烷基取代基结合可产生π-π堆叠的层状基序。密度泛函理论计算表明,界面层状基序可改善这些化合物的电荷传输性质,从而提供一种增强功能性有机材料中电子传输的方式。
Synthesis and Characterization of Cyclooctatetrathiophenes with Different Connection Sequences
作者:Yong Wang、Jinsheng Song、Li Xu、Yuhe Kan、Jianwu Shi、Hua Wang
DOI:10.1021/jo500278d
日期:2014.3.7
Based on the selectivity of deprotonation of 5,5'-bistrimethylsilyl-2,3'-bithiophene (4) in the presence of n-BuLi, three new cyclooctatetrathiophenes (COThs), COTh-1, COTh-2, and COTh-3 have been efficiently developed via intermolecular or intramolecular cyclizations. Their crystal structures clearly show that the different connectivity sequence of the thiophene rings in the molecules. The CV data and UV-vis absorbance spectra of COThs are also described. In addition, the time-dependent density functional theory (TDDFT) calculations accurately reproduce experimental observations and afford band assignment.