Bazito Fernanda F C, Silveira Leonardo T, Torresi Roberto M, Córdoba de Torresi Susana I
Instituto de Química, Universidade de São Paulo, C.P. 26077, 05513-970 São Paulo, Brazil.
Phys Chem Chem Phys. 2008 Mar 14;10(10):1457-62. doi: 10.1039/b714458j. Epub 2008 Jan 18.
The electrochemical polymerization of aniline in a hydrophobic room-temperature ionic liquid and the spectroelectrochemical characterization of the formed film are presented. The polymerization occurs without the presence of acid in 1-butyl-2,3-dimethylimidazolium bis(trifluoromethanesulfonyl)imide (BMMITFSI), leading to a very stable electroactive material where no degradation was observed even at high applied potentials. Both in situ UV-Vis and Raman spectroscopic studies provided evidence for the stabilization of pernigraniline salt at high oxidation potentials and that this polyaniline state is the conducting form, as was corroborated by in situ resistance measurements. These data are indicative that low conductivity is not an intrinsic property of pernigraniline salt and this point must be reconsidered.
本文介绍了苯胺在疏水室温离子液体中的电化学聚合以及所形成薄膜的光谱电化学表征。聚合反应在1-丁基-2,3-二甲基咪唑双（三氟甲磺酰）亚胺（BMMITFSI）中无酸存在的情况下发生，生成了一种非常稳定的电活性材料，即使在高外加电位下也未观察到降解。原位紫外-可见光谱和拉曼光谱研究均提供了证据，证明在高氧化电位下过苯胺盐得以稳定，且这种聚苯胺状态是导电形式，原位电阻测量也证实了这一点。这些数据表明，低电导率并非过苯胺盐的固有特性，这一点必须重新考虑。
