| 金电极上电子传递促进剂作用的EQCM研究 |
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| 引用本文： | 吴霞琴,王浙苏,孟晓云,章宗穰. 金电极上电子传递促进剂作用的EQCM研究[J]. 电化学, 2000, 6(2): 163-168 |
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| 作者姓名： | 吴霞琴 王浙苏 孟晓云 章宗穰 |
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| 作者单位： | 上海师范大学化学系!上海200234,上海师范大学化学系!上海200234,上海师范大学化学系!上海200234,上海师范大学化学系!上海200234 |
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| 基金项目： | 上海市科委自然科学基金!资助项目 (97ZA140 0 4) |
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| 摘 要： | 本文比较了L_半胱氨酸、组氨酸和精氨酸等三种氨基酸在石英晶体微天平金电极上的吸附行为 .重点考察了超氧化物歧化酶在L_半胱氨酸存在的混合溶液中以及事先经L_半胱氨酸修饰的金晶振电极上的循环伏安曲线和频率响应曲线 .实验结果表明 ,超氧化物歧化酶在L_半胱氨酸修饰的金晶振电极上的电子传递过程是一个准可逆过程 ,它同时对应于一个可逆的吸脱附过程 .初步讨论了L_半胱氨酸对超氧化物歧化酶电子传递过程的促进机制 .
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| 关 键 词： | 超氧化物歧化酶 氨基酸 L-半胱氨酸 电化学石英晶体微天平 |
| 收稿时间： | 2000-05-28 |
Electrochemical Quartz Crystal Microbalance Study on the Promoted Electron Transfer Process at Gold Electrode |
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| WU Xia-qin,WANG Zhe-su,MENG Xiao-yun,ZHANG Zong-rang. Electrochemical Quartz Crystal Microbalance Study on the Promoted Electron Transfer Process at Gold Electrode[J]. Electrochemistry, 2000, 6(2): 163-168 |
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| Authors: | WU Xia-qin WANG Zhe-su MENG Xiao-yun ZHANG Zong-rang |
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| Abstract: | The adsorption behavior of amino acids, such as L_cysteine, histidine and arginine at gold_quartz crystal microbalance (Au_QCM) was investigated. The adsorption quantity of cysteine is more appreciable than others because of the stronger interaction between its thiol group and the gold electrode surface. The electron_transfer process of superoxide dismutase(SOD) in presence of cysteine at Au_QCM has also been studied using the electrochemical quartz crystal microbalance (EQCM) technique which reveals clearly the quasi_reversible electron_transfer process accompanied by the frequency shift cycle. The reversible adsorption and disorption processes are discussed. |
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| Keywords: | Superoxide dismutase Amino acids L_Cysteine EQCM |
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