共轭体系
循环伏安法
电化学
位阻效应
Stille反应
聚合物
材料科学
高分子化学
导电聚合物
组合化学
光化学
化学
有机化学
电极
物理化学
作者
Flavia Piron,Philippe Leriche,Ion Grosu,Jean Roncali
摘要
Three-dimensional conjugated architectures involving conjugated branches with terminal EDOT groups attached onto a bithiophene core twisted by ca. 90° by steric interactions have been synthesized by Stille coupling reactions. The UV-Vis absorption spectra recorded in solution show complex spectral features that depend on both the size and chemical structure of the main conjugated segment and of the conjugated side chains. Thanks to the fixation of the terminal EDOT groups, these compounds undergo straightforward and complete electropolymerization to produce stable electrode materials. The analysis of the electrochemical and optical properties of the polymers by cyclic voltammetry and spectroelectrochemistry suggests that the electrochemical coupling of the terminal EDOT groups leads to the formation of π-conjugated networks the electrochemical and optical properties of which can be tuned through the length and chemical composition of the oligomeric conjugated links.
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