DNA修饰电极的研究——Ⅷ.1,10-菲咯啉存在时钴离子在ssDNA修饰金电极上的电化学行为及痕量钴的检测  

DNA - Modified Electrodes——Ⅷ. Electrochemical Behavior of Co^(3+ /2+) at Single - Stranded DNA Modified Gold Electrodes in the Presence of 1,10 - Phenanthroline and the Detection of Trace Cobalt

作　　者：庞代文[1] 陆琪[1] 赵元弟[1] 张敏[1] 

机构地区：[1]武汉大学化学系,武汉430072

出　　处：《化学学报》2000年第5期524-528,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(29773034;39770220);教育部留学回国人员科研基金;湖北省自然科学基金(96J037)资助项目

摘　　要：发现在过量1,10-菲咯啉存在时,Co^(3+/2+)在单链DNA(ssDNA)修饰金电极上的电化学响应显著增强.采用紫外光谱和循环伏安法考察了Co^(3+/2+)/1,10-菲咯啉体系与ssDNA的相互作用,并利用Co^(3+/2+)在1,10-菲咯啉存在时在ssDNA修饰金电极上的高灵敏电化学响应对痕量钴离子进行了测定.The current response of Co^(3 + /2 +) was dramatically enhanced at single - stranded DNA (ssDNA) modified gold electrodes in the presence of excess 1,10 - phenanthroline. The interaction between Co3+/2+ /1, 10- phenanthroline and ssDNA was investigated by ultraviolet spectroscopy and cyclic voltammetry. Based on the highly sensitive electrochemical responses of Co3 + /2+ at ssDNA modified gold electrodes in the presence of 1,10 - phenanthroline, a method for the detection of trace cobalt was developed.

关 键 词：DNA修饰电极 菲咯啉 钻离子 电化学 

分 类 号：O657.1[理学—分析化学]