Stimuli-Responsive Conjugated Copolymers Having Electro-Active Azulene and Bithiophene Units in the Polymer Skeleton: Effect of Protonation and p-Doping on Conducting Properties
作者:Fuke Wang、Yee-Hing Lai、Ming-Yong Han
DOI:10.1021/ma035335q
日期:2004.5.1
doping (p-doping) or protonation by TFA. The effects of p-doping and protonation on their conducting properties could be observed by UV−vis−NIR, EPR, SEM, and CV measurements, revealing different conducting mechanisms in p-doping and protonation. The EPR studies in particular confirmed the reversible protonation−deprotonation processes and high stability of the formed cation radicals at a p-doped or protonated
通过氧化聚合合成了一系列在聚合物主链中包含烷基化联噻吩和电活性active烯的刺激响应共轭共聚物。这些共聚物以高收率形成,并在常见的有机溶剂(如氯仿,甲苯和THF)中具有良好的溶解性。它们还具有16 000至41 000的高分子量(M n),其结构与NMR,FTIR和元素分析表明的结构一致。这些共聚物具有高度的热稳定性和环境稳定性。像聚苯胺一样,这些azulene-thiophene共聚物可以被赋予高导电性(1-50 S cm -1)可通过两种途径进行:碘掺杂(p型掺杂)或TFA质子化。通过UV-vis-NIR,EPR,SEM和CV测量可以观察到p掺杂和质子化对其导电性能的影响,揭示了p掺杂和质子化中的不同导电机理。EPR研究特别证实了在p掺杂或质子化状态下可逆的质子去质子化过程和所形成阳离子自由基的高稳定性,表明它们在电子开关或抗氧化剂材料中的潜在应用。SEM研究表明,碘掺杂后会形成纳米