第 41 卷第 5 期 |  | Vol. 41 No. 5 | 2011 年 10 月 | Oct 2011 |
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所屬欄目:功能材料
鳥(niǎo)嘌呤和腺嘌呤吸附和電氧化行為的電化學(xué)石英晶體微天平研究 |
曾艷子,謝青季*,周亞平,黃 毅,秦 聰
(湖南師范大學(xué) 化學(xué)生物學(xué)及中藥分析教育部重點(diǎn)實(shí)驗室,化學(xué)化工學(xué)院,湖南 長(cháng)沙 410081) |
摘 要:基于壓電電化學(xué)石英晶體微天平(EQCM)技術(shù),研究了腺嘌呤(A)和鳥(niǎo)嘌呤(G)在裸金電極和多壁碳納米管(MWCNTs)修飾金電極上的吸附和電氧化行為。結果表明,在金電極上,A的吸附量和氧化電流均比G大,而在MWCNTs/Au電極上,A和G可類(lèi)似地吸附,但其氧化峰電位負移且氧化峰電流增大,表明MWCNTs對A和G的氧化具有催化作用。實(shí)驗發(fā)現,A和G在裸金電極上氧化的電子轉移數分別為5.4(RSD=±2.3%)和1.9(RSD=±1.3%),而在MWCNTs/Au電極上的氧化電子轉移數分別為5.1(RSD=±1.8%)和1.5(RSD=±1.6%)。 |
關(guān)鍵詞:腺嘌呤;鳥(niǎo)嘌呤;吸附;電氧化;電化學(xué)石英晶體微天平 |
中圖分類(lèi)號:TQ15 文獻標識碼:A 文章編號:1009-9212(2011)05-0048-05 |
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Electrochemical Quartz Crystal Microbalance Study on Adsorption and Electrooxidation of Adenine and Guanine |
ZENG Yan-zi,XIE Qing-ji*,ZHOU Ya-ping,HUANG Yi,QIN Cong
(Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research of the Ministry of Education of China,College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China) |
Abstract:The electrochemical quartz crystal microbalance(EQCM)technique was used to study the adsorption and electro-oxidation behavior of adenine(A)and guanine(G)on bare and multi-walled carbon nanotubes(MWCNTs)modified gold electrodes. The results showed that the adsorption amount and oxidation current of A were larger than those of G on the Au electrode. Both A and G could be similarly adsorbed on the surface of MWCNTs/Au electrode,but the oxidation peak potentials for both A and G shifted negatively,and their oxidation peak currents increased. The numbers of electrons transferred for oxidation of A and G on the Au electrode were 5.4(RSD=2.3%)and 1.9(RSD=1.3%),and those on the MWCNTs/Au electrode were 5.1(RSD= 1.8%)and 1.5(RSD=1.6%),respectively. |
Key words:adenine;guanine;adsorption;electro-oxidation;electrochemical quartz crystal microbalance |
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基金項目:國家自然科學(xué)基金(21175042,21075036)資助項目。
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作者簡(jiǎn)介:曾艷子(1986-),湖南臨武人,碩士研究生,研究方向:生物傳感器。
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聯(lián) 系 人:謝青季,教授。(E-mail:xieqj@hunnu.edu.cn)
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收稿日期: 2011-08-2
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