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首页> 外文期刊>International Journal of Electrochemical Science >Multi-electrochromic 2,7-linked Polycarbazole Derivative and Its Application in Electrochromic Devices
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Multi-electrochromic 2,7-linked Polycarbazole Derivative and Its Application in Electrochromic Devices

机译：多电致变色2,7-连接的聚咔唑衍生物及其在电致变色器件中的应用

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摘要

Two 2,7-linked carbazole derivatives, 2,7-bis(2-thiophene)-N-methylcarbazole (BTC) and 2,7-bis(2- 3,4-ethylenedioxythiophene)-N-methylcarbazole (BEC), were successfully synthesized andelectropolymerized. The electrochemical and optical investigations indicated that the two monomersand their resulting polymers (PBTC and PBEC) showed excellent polymerization and redox activity,and substitution with EDOT units resulted in a decrease in the monomer and polymer oxidationpotentials, narrowing of the electronic band gap relative to the corresponding thiophene substituted2,7-carbazoles. Spectroelectrochemical study revealed that both of the polymers had interestingelectrochromic properties and displayed multi-electrochromic behaviors as well as good switchingproperties. The electrochromic properties of the two polymers are dependent on the selective ofsubstituents attached at the 2,7-positions of N-methylcarbazole. Moreover, dual-type electrochromicdevices (ECDs) consisting of PBTC (or PBEC) and PEDOT layers were also fabricated andcharacterized in detail. It was found that both of the ECDs dispalyed good electrochromicperformances, such as reasonable optical contrast, fast response time and excellent redox stability.
机译：两个2,7-连接的咔唑衍生物分别是2,7-双（2-噻吩）-N-甲基咔唑（BTC）和2,7-双（2- 3,4-乙撑二氧噻吩）-N-甲基咔唑（BEC）成功合成和电聚合。电化学和光学研究表明，这两种单体及其生成的聚合物（PBTC和PBEC）表现出优异的聚合和氧化还原活性，用EDOT单元取代导致单体和聚合物的氧化电位降低，相对于PBT而言，电子带隙变窄。相应的噻吩取代的2,7-咔唑。光谱电化学研究表明，这两种聚合物都具有令人感兴趣的电致变色性能，并表现出多电致变色行为以及良好的转换性能。两种聚合物的电致变色性能取决于在N-甲基咔唑的2,7位连接的取代基的选择。此外，还制作并表征了由PBTC（或PBEC）和PEDOT层组成的双色电致变色器件（ECD）。发现两种ECD均表现出良好的电致变色性能，例如合理的光学对比度，快速的响应时间和优异的氧化还原稳定性。

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