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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (11): 1071-1074. 上一篇    下一篇

研究论文

4',7-二甲氧基-3'-异黄酮磺酸钠的电化学行为研究

郑建斌, 董社英, 延绥宏, 高鸿   

  1. 西北大学电分析化学研究所, 西安, 710069
  • 投稿日期:2003-07-11 修回日期:2004-02-15 发布日期:2014-02-17
  • 通讯作者: 郑建斌,E-mail:zhengjb@nwu.edu.cn E-mail:zhengjb@nwu.edu.cn
  • 基金资助:
    国家自然科学基金(No.20275030)、教育部科学技术研究重点项目(No.02187)、教育部高等学校骨干教师资助计划(No.GG-150-71006-2877)和陕西省教育厅专项科研基金(No.01JK076)资助项目.

Investigation on the Electrochemical Behavior of Sodium 4', 7-Dimethoxy-3'-isofiavone Sulfonate

ZHENG Jian-Bin, DONG She-Ying, YAN Sui-Hong, GAO Hong   

  1. Institute of Electroanalytical Chemistry, Northwest University, Xi'an 710069
  • Received:2003-07-11 Revised:2004-02-15 Published:2014-02-17

PDF

336

被引次数

15

采用线性扫描伏安法和循环伏安法研究了4',7-二甲氧基-3'-异磺酮磺酸钠(Sodium 4',7-dimethoxy-3'-isoflavone sulfonate,SDIS)在pH=1.0～12.0的水溶液中的电化学行为.实验结果表明:在pH=1.0～5.0条件下所获得的Pc1,Pc2波分别为SDIS的单质子单电子不可逆还原波及还原中间体自由基的单电子单质子不可逆还原波;在5＜pH＜8条件下所获得的Pc1波,仍属于SDIS单电子单质子不可逆还原波,而还原中间体自由基的单电子波被氢波掩盖;在pH＞8.0的O.2 mol·L-1Britton-Robinson缓冲溶液中所获得的Pc1,Pc2波分别为质子化的SDIS单电子不可逆还原波及还原中间体自由基的单电子单质子不可逆还原波.

关键词: 电化学行为, 还原, 4',7-二甲氧基-3'-异磺酮磺酸钠

The electrochemical behavior of sodium 4',7-dimethoxy-3'-isoflavone sulfonate (SDIS) in aqueous medium from pH 1.0 to 12.0 was investigated with linear sweep voltammetry and cyclic voltammetry. Experimental results showed that SDIS could cause two reductive waves in different range of pH. In pH 1.0～8.0, the carbonyl group C≡O in SDIS underwent a 1e- and 1H+ reduction to form a neutral free radical, and then 1e- and 1H+ reduction of the free radical happened, but the wave of reduction species radical of SDIS was covered because of a discharge of hydrogen ion into the electrolyte solution in pH=5.1 to 8.0. In 0.2 mol·L-1 Britton-Robinson buffer solution of pH8.0, SDIS could cause two reduction waves. The former was an irreversible wave of promoted SDIS involving 1e- and the latter was also an irreversible wave of reduction species radical of SDIS involving 1e- and 1H+.

Key words: electrochemical behavior, reduction, sodium 4’,7-dimethoxy-3’-isoflavone sulfonate