[Ru(bpy)_2(tatp)]^(2+)介导d(AG)_(10)和d(AC)_(10)在ITO电极上的组装与氧化  

Assembly and oxidation of d(AG)_(10) and d(AC)_(10) mediated by [Ru(bpy)_2(tatp)]^(2+) on an ITO electrode

作　　者：甘桂莲[1] 姚夙[1] 李红[1] 

机构地区：[1]华南师范大学化学与环境学院,广州510006

出　　处：《中国科技论文》2013年第3期270-274,共5页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20094407120008);广东省自然科学基金资助项目(10351063101000001)

摘　　要：应用循环伏安法和微分脉冲伏安法研究了[Ru(bpy)2(tatp)]2+(bpy=2,2′-联吡啶,tatp=1,4,8,9-四氮三联苯)介导d(AG)10和d(AC)10在铟锡氧化物(ITO)电极上的组装与氧化。结果表明,应用连续微分脉冲伏安法能有效地实现[Ru(bpy)2(tatp)]2+介导的d(AG)10和d(AC)10在ITO电极上的组装,并且d(AG)10的组装效果优于d(AC)10。ITO电极上的组装层在约0.64V出现1对由表面电化学控制的氧化还原峰,峰电流随着伏安扫描次数的增大而增大。同时,[Ru(bpy)2(tatp)]2+能介导d(AG)10在ITO电极上的氧化,但对d(AC)10介导氧化效果不明显。此外,结合荧光显微镜和荧光光谱探讨了d(AG)10和d(AC)10在ITO电极上电化学组装和电催化氧化的机理。The electrochemical assembly and oxidation of d（AG）10 and d（AC）10 mediated by [Ru（bpy）2 （tatp）]^2＋ （where bpy = 2, 2＇- hipypyridine, tatp = 1,4,8,9-tetra-aza-triphenylene） on an indium-tin oxide （ITO） electrode have been investigated by cyclic voltammetry and differential pulse voltammetry. The results showed that [Ru（bpy）2 （tatp）]^2＋ can effectively mediate the assembly of d（AG）10 and d（AC）10 on the ITO electrode by means of differential pulse voltammetry, in which the extent of d （AG）10 is much larger than that of d（AC）10. The composite layers assembled on the ITO electrode exhibit a pair of redox peaks at about 0. 64 V controlled by the surface electrochemical process, whose peak currents show a gradual increase with increasing progres sively voltammetric sweeping number. [Ru（bpy）2 （tatp）]^2＋ can mediate the oxidation of d（AG）10 on the ITO electrode, while the （AC）10 can hardly be oxidized by the Ru（II） mediator. In addition, the mechanism for the electrochemical assembly and electro- catalytic oxidation of d（AG）10 and d（AC）10 on the ITO electrode was explored by combining with fluorescence microscopy and flu orescence spectroscopy.

关 键 词：物理化学 多吡啶钌(Ⅱ)配合物 DNA 电化学组装 电催化氧化 

分 类 号：O646.54[理学—物理化学]