Abstract In this study, a series of novel star-shaped monosubstituted 2,6-diphenyl-4,4′-bipyridinium salts with various alkyl, alkenyl, and aryl groups were designed and synthesized, and their electrochemical, electro-optical, and electrochromic properties were investigated. The electrochromic properties such as different colored states (sky blue versus purple), reasonable contrast, coloration efficiency, and, in particular, the switching stabilities of electrochromic devices based on star-shaped monosubstituted 2,6-diphenyl-4,4′-bipyridinium salts were better than those of devices based on linear monosubstituted pyridinium salts. All the compounds with alkyl, alkenyl, and aryl groups showed good switching stability and the change in the optical contrast after 1000 cycles was small (

中文翻译：

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具有良好电致变色开关稳定性的星形单取代 2,6-二苯基-4,4'-联吡啶盐

摘要 本研究设计合成了一系列具有不同烷基、烯基和芳基的新型星形单取代 2,6-二苯基-4,4'-联吡啶鎓盐，并对其电化学、电光和电致变色性能进行了研究。属性进行了调查。电致变色特性，例如不同的着色状态（天蓝色与紫色）、合理的对比度、着色效率，尤其是基于星形单取代 2,6-二苯基-4,4'-联吡啶的电致变色器件的开关稳定性盐优于基于线性单取代吡啶鎓盐的器件。所有具有烷基、烯基和芳基的化合物均表现出良好的开关稳定性，1000 次循环后光学对比度的变化很小（