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Studies on Electrochemical Synthesis of Polythiophene in an Ionic Liquid
Shi Jiahua,Yang Chunhe,Gao Qingyu*,Li Yongfang
Author NameAffiliationE-mail
Shi Jiahua College of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475001Center for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100080  
Yang Chunhe Center for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100080  
Gao Qingyu* College of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475001 qingyugao@henu.edu.cn 
Li Yongfang Center for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100080  
Abstract:
Polythiophene(PTh)films were prepared by the direct electropolymerization of thiophene in the ionic liquid,1-butyl-3-methylimidazolium hexafluorophosphate(BMIM)PF6 . 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)PF6 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.
Key words:  Ionic liquid(BMIM)PF6,Polythiophene,Electrochemical polymerization,Cyclic voltammetry
FundProject:
聚噻吩在离子液体中的电化学合成研究
石家华,杨春和,高青雨*,李永舫
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1.7~1.9 V(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
关键词:  离子液体(BMIM)PF6  聚噻吩  电化学聚合  循环伏安法
DOI:10.1088/1674-0068/17/4/503-507
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