Novel ECPs (electronic conducting polymers) based on amino β-styryl-substituted terthiophene (AST) were synthetized by direct electropolymerization. The ECPs were characterized by cyclic voltammetry, square-wave voltammetry, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The poly(amino β-styryl terthiophene) displayed cyclic and square-wave voltammograms with redox peaks that can be assigned to the aminophenyl moiety and the polyterthiophene backbone. The presence of free primary amine groups on the ECP film permitted further biological functionalization (i.e., covalent bonding of various bioreceptors on its surface). The electrochemical performance of Biotin grafted at the AST modified glassy carbon electrode was investigated to detect the Avidin protein in solution by cyclic voltammetry and square-wave voltammetry.Key words: electronic conducting polymer, electrode surface modification, biosensor, β-styryl-substitued terthiophene, functionalization, cyclic, square-wave voltammetry.
通过直接电聚合法合成了基于氨基 β-苯乙烯基取代噻吩(AST)的新型 ECP(电子导电聚合物)。通过循环伏安法、方波伏安法、傅立叶变换红外光谱法和 X 射线光电子能谱法对 ECP 进行了表征。聚(氨基 β-苯乙烯基噻吩)显示出循环伏安图和方波伏安图,其氧化还原峰可归属于氨基苯基和聚噻吩骨架。ECP 薄膜上存在的游离伯胺基团允许进一步的生物功能化(即在其表面共价键合各种生物受体)。通过循环伏安法和方波伏安法研究了接枝在 AST 改性玻璃碳电极上的生物素的电化学性能,以检测溶液中的 Avidin 蛋白。