Cu(Ⅱ)-α-氨基酸配合物溶液在金电极上的电化学行为

ELECTROCHEMICAL BEHAVIOR OF COMPLEXES OF Cu(Ⅱ) WITH α-AMINO ACIDS ON GOLDEN ELECTRODE

在金电极上,用循环伏安法对Cu(Ⅱ)与甘氨酸(Gly)、亮氨酸(Leu)和组氨酸(His)3种α-氨基酸形成的二元及混配配合物溶液的电化学行为进行了初步研究,并讨论了不同介质的影响.研究结果表明,在-0.20-+0.60V或-0.10-+0.60V(vs.SCE)电位范围内,以KNO3介质或磷酸盐缓冲溶液(pH=7.2)为底液时,Cu(Ⅱ)及其配合物的循环伏安曲线都出现了一对稳定的氧化还原峰,从峰电位可知,此对氧化还原峰应为Cu(Ⅱ)还原为Cu(Ⅰ)的电极反应过程.

The electrochemical behavior of Cu(Ⅱ) and complexes of Cu(Ⅱ) with three kinds of α-amino acids(Gly,Leu,His) on golden electrode were investigated with cyclic voltammetry. In the potential range of -0.20-+0.60V and -0.10-+0.60V(vs.SCE), Cu(Ⅱ) and the complexes showed electrochemical activities in KNO_3 solution and phosphate buffer (pH=7.2). Furthermore,the influence of supported electrolyte were also discussed.