| 碱基腺嘌呤与胸腺嘧啶在Au(111)电极上的共吸附 |
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| 引用本文： | 伍三华,徐英明,张柏林.碱基腺嘌呤与胸腺嘧啶在Au(111)电极上的共吸附[J].分析化学,2009,37(11). |
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| 作者姓名： | 伍三华 徐英明 张柏林 |
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| 作者单位： | 1. 中科院长春应用化学研究所电分析国家重点实验室,长春,130022;中国科学院研究生院,北京,100049
2. 中科院长春应用化学研究所电分析国家重点实验室,长春,130022 |
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| 摘 要： | 用循环伏安法(CV)和电化学扫描隧道显微镜(ECSTM)在HClO4溶液中研究了配对碱基腺嘌呤(Adenine,A)与胸腺嘧啶(Thymine,T)在Au(111)电极上的共吸附行为.CV曲线表明,A和T的电化学共吸附行为更接近于A的电化学吸附行为.高分辨STM图像显示,在物理吸附区域碱基A和T分子之间通过氢键作用形成一种不同于单组分的网络结构.根据STM图像提出一个可能的模型,并给出了在Au(111)电极上共吸附时A和T分子之间可能的氢键作用方式.
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| 关 键 词： | 电化学扫描隧道显微镜 腺嘌呤 胸腺嘧啶 共吸附 Au(111)电极 |
Coadsorption of Adenine and Thymine on Au(111) Electrode |
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| WU San-Hua,XU Ying-Ming,ZHANG Bai-Lin.Coadsorption of Adenine and Thymine on Au(111) Electrode[J].Chinese Journal of Analytical Chemistry,2009,37(11). |
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| Authors: | WU San-Hua XU Ying-Ming ZHANG Bai-Lin |
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| Institution: | WU San-Hua1,2,XU Ying-Ming1,ZHANG Bai-Lin 1 1 ( State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022) 2 ( Graduate School of Chinese Academy of Sciences,Beijing 100049) |
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| Abstract: | The coadsorption behavior of two complementary DNA bases,adenine( A) and thymine( T) ,was studied on Au(111) electrode by cyclic voltammetry( CV) and electrochemical scanning tunneling microscopy ( ECSTM) in aqueous solution. From the CVs,the coadsorption behavior of A and T was more closed to the adsorption behavior of A. In the potential range of physisorption,high-resolution ECSTM images of revealed that a new super-structure was formed by the hydrogen bonds between A and T. A molecular model of the supe... |
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| Keywords: | Electrochemical scanning tunneling microscopy adenine thymine coadsorption Au(111) |
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