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首页> 外文会议>The 2nd International Symposium on Functional Materials >Substituent Effect on Oxidative Electrochemical Switching For Photochromic Asymmetrical Dithienylcyclopentenes
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Substituent Effect on Oxidative Electrochemical Switching For Photochromic Asymmetrical Dithienylcyclopentenes

机译：取代基对光致变色不对称二噻吩基环戊烯的氧化电化学转换的影响

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摘要

A series of photochromic dithienylcyclopentenes bearing different substituent at one terminal benzene ring have been synthesized and the substituent effect on their electrochemical properties was investigated in details. The results indicated that the efficiency of electrochemical switching is dependent on the nature of substituents, and the ring-closure isomers of these compounds undergo intramolecular electron transfer from the phenyl-substituted group to the central cyclopentene unit too. The substituent effect on the oxidation potential, such as chlorine, fluorine, methoxyl or methyl group, was very remarkable in both ring-open and ring-closure isomers, with the exception of that of ethoxyl group. However, the oxidation potential changes of diarylethenes with electron-withdrawing groups, e.g. fluorine atom, are clearly different from that of diarylethenes with electron-donating groups.
机译：合成了一系列在一个末端苯环上带有不同取代基的光致变色二噻吩基环戊烯，并详细研究了取代基对其电化学性能的影响。结果表明，电化学转换的效率取决于取代基的性质，并且这些化合物的闭环异构体也经历分子内电子从苯基取代的基团到中心环戊烯单元的转移。除乙氧基外，在开环和闭环异构体中，取代基对氧化电位的影响，例如氯，氟，甲氧基或甲基，都非常显着。但是，具有吸电子基团的二芳烃的氧化电势发生变化。氟原子明显不同于带有给电子基团的二芳烃。

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