离子液体中吡咯的电化学聚合及性质研究

以1-丁基-3-甲基咪唑六氟磷酸盐离子液体作为溶剂和支持电解质,分别在铂电极和导电玻璃电极上电化学聚合得到了聚吡咯,聚合过程中发现,在离子液体中聚合的循环伏安图,其电流的变化和传统有机溶剂中的不同,通过交流阻抗技术研究了修饰电极的电化学性质,采用在线紫外、拉曼、红外谱对聚吡咯进行了光谱表征,得到了聚吡咯的特征峰,采用扫描电镜研究了聚合物的形貌。最后将修饰电极应用到了对对苯二酚的催化反应当中,显示了一定的催化作用。

Electrochemical Synthesis of Polypyrrole in a Room Temperature Ionic Liquid and Its Properties

Polypyrrole (PPy) films were electropolymerized on Pt and indium‐tin‐oxide (ITO) electrodes in a room temperature ionic liquid, 1‐buthyl‐3‐methylimidazolium hexafluorophosphate (bmimPF₆). The ionic liquid was used as both the growth medium and the supporting electrolyte. The cyclic voltammetry (CV) shows that the growth of polymer, prepared in ionic liquid was not similar to that prepared in traditional organic media. The polymer was further characterized via AC impedance, in situ UV‐Visible spectroscopy, scanning electron microscopy (SEM), Raman and Fourier transform infrared spectroscopy (FTIR). Both Raman and FTIR spectroscopy results show the characteristic peak of PPy. SEM shows the morphology differences between the both sides of the polymer. The electrocatalytic effect of the PPy modified electrode was investigated in hydroquinone solution and the result exhibited electrocatalytic properties for hydroquinone by the PPy modified electrode.