| 依来铬蓝黑B的电还原 |
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| 引用本文： | 刘雁鸣,汪尔康.依来铬蓝黑B的电还原[J].应用化学,1984,0(1):36-41. |
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| 作者姓名： | 刘雁鸣 汪尔康 |
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| 作者单位： | 1. 山西大学化学系;2. 中国科学院长春应用化学研究所 |
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| 摘 要： | 本文使用普通极谱、脉冲极谱、循环伏安法研究了依来铬蓝黑B的电还原。在pH=2-12间,依来铬蓝黑B可产生一个受扩散控制的不可逆还原波。随pH增加,在pH6附近电子数由2增到4(对数分析),E1/2线性负移, ∂E1/2/∂pH=-65mV。根据实验结果,提出一带有不稳定中间体的岐化反应的电还原机理。由此,解释了电子数随pH变化的原因。
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| 收稿时间： | 1983-08-13 |
ELECTROREDUCTION OF ERIOCHROME BLUE BLACK B |
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| Liu Yanmin,Wang Erkang.ELECTROREDUCTION OF ERIOCHROME BLUE BLACK B[J].Chinese Journal of Applied Chemistry,1984,0(1):36-41. |
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| Authors: | Liu Yanmin Wang Erkang |
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| Institution: | 1. Department of Chemistry, Shanxi University;2. Changchun Institute of Applied Chemistry, Academia Sinica |
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| Abstract: | Electroreduction of eriochrome blue black B was studied by d.c. pola-rography, differential pulse polarography and cyclic voltammetry. Only asingle wave which was diffusion-controlled and totally irreversible appearedover the range of pH2-12. With increasing pH, the electron number(according to logarithmic analysis) of the electrode reaction was changedfrom 2 to 4 around pH6, and the E1/2 shifted linearly toward more nega-tive potential with a slope of -65mV/pH. Based on the experimentalresults, a mechanism involving the disproportionation of an unstable inter-mediate was proposed for the reducton of eriochrome blue black B, andby this, the change of electron number with pH was explained. |
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