聚噻吩在离子液体中的电化学合成研究  

Studies on Electrochemical Synthesis of Polythiophene in an Ionic Liquid

作　　者：石家华[1] 杨春和[2] 高青雨[1] 李永舫[2] 

机构地区：[1]河南大学化学化工学院,开封475001 [2]中国科学院化学研究所分子科学中心,北京100081

出　　处：《Chinese Journal of Chemical Physics》2004年第4期503-507,共5页化学物理学报（英文）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina (2 0 0 0 40 10 )

摘　　要：在 1 丁基 3 甲基咪唑六氟磷酸盐离子液体 (BMIM)PF6 中直接电化学合成制备了聚噻吩膜 .通过红外光谱 (FT IR)和扫描电子显微镜 (SEM)对聚噻吩膜的结构和形貌进行了表征 .利用紫外可见光谱 (UV Vis)、循环伏安法 (CV)和四探针法研究了聚噻吩膜的电子和电化学特性 .研究结果表明 ,在电位 1.7～ 1.9V(相对于Ag/AgCl) ,在(BMIM)PF6 中可以制备均匀的聚噻吩膜 ,其中 ,离子液体 (BMIM)PF6 既作为溶剂又作支持电解质 ;在离子液体中制备的聚噻吩膜具有良好的稳定性和充放电能力 ,聚噻吩膜的电导率在 0 .0 1～ 0 .1S/cm .Polythiophene (PTh) films were prepared by the direct electropolymerization of thiophene in the ionic liquid, 1 butyl 3 methylimidazolium hexafluorophosphate (BMIM)PF 6. The structure and morphology of PTh films were characterized by means of the FT IR spectrum and the scanning electron microscopy (SEM). The electrical and electrochemical properties of PTh films were examined with the UV Vis spectrum, cyclic voltammetry (CV) and four probe method. The results showed that when the potential for electropolymerization was controlled between +1.7 and +1.9 V (vs. Ag/AgCl), very homogeneous PTh films could be prepared in the ionic liquid (BMIM)PF 6 used as solvent and electrolyte. The de doping (reduction) and re doping (re oxidation) of the PTh film prepared in ionic liquid are reversible and stable, and the conductivity of PTh films is 0.01～0.1 S/cm.

关 键 词：离子液体(BMIM)PF6 聚噻吩 电化学聚合 循环伏安法 

分 类 号：O631[理学—高分子化学]