作者
Yifan Li, Alberto Concellón, Che-Jen Lin, Nathan A Romero, Sibo Lin, Timothy M Swager
发表日期
2020
期刊
Chemical Science
卷号
11
期号
18
页码范围
4695-4701
出版商
Royal Society of Chemistry
简介
Efficient syntheses that incorporate thiophene units into different extended conjugation systems are of interest as a result of the prevalence of sulfur-rich aromatics in organic electronics. Self-organization by using liquid crystal properties is also desirable for optimal processing of organic electronics and optical devices. In this article, we describe a two-step process to access extended regioisomers of polyaromatics with different shapes. This method involves an efficient single or double benzannulation from an alkyne precursor followed by Scholl cyclization. In spite of their unconventional nondiscoid shape, these materials display stable columnar liquid crystal phases. We examine the photophysical and electrochemical properties and find that structurally very similar thiophene-fused polyaromatics display significant differences in their properties.
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