用循环伏安法研究烷氧基聚紫精的电氧化还原性能

Study on Electroredox Behaviors of Alkoxyl Viologen Polymers with Cyclic Voltammetry

利用循环伏安法研究了烷氧基聚紫精(PAoV)的电氧化还原性能,测定了它们的两步还原电位、峰电流和表现扩散系数(D),结果表明:D随着PAoV结构中所含醚键的增加而减小;并对第一步还原反应的可逆性进行了研究,发现第一步还原反应的可逆性优于第二步还原反应,同时证明电极反应是由扩散步骤控制的;PAoV具有良好的抗电疲劳性能;并研究了体系pH值和扫描范围对PAoV的电氧化还原性能的影响。

The electroredox behavior of alkoxyl viologen polymers(PAoV) was studied with cyclic voltammetry. The two step redox potentials and diffusion coefficients were determined, and the reversibility of the first step electrore-duction was also studied. The results show that the reversibility of the first step electroreduction is better than that of the second one, and the reaction of electrode is diffusion-controlled. The good fatigue property of PAoV was observed. Moreover, the influences of pH value and scan ranges on the electroredox behaviors were investigated.