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, 1(1): 36-41.
Citation: Liu Yanmin, Wang Erkang. ELECTROREDUCTION OF ERIOCHROME BLUE BLACK B[J]. Chinese Journal of Applied Chemistry, 1984, 1(1): 36-41.
Citation: Liu Yanmin, Wang Erkang. ELECTROREDUCTION OF ERIOCHROME BLUE BLACK B[J]. Chinese Journal of Applied Chemistry, 1984, 1(1): 36-41.
依来铬蓝黑B的电还原
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。
English
ELECTROREDUCTION OF ERIOCHROME BLUE BLACK B
Abstract:
Electroreduction of eriochrome blue black B was studied by d.c. pola-rography, differential pulse polarography and cyclic voltammetry. Only a single wave which was diffusion-controlled and totally irreversible appeared over the range of pH2-12. With increasing pH, the electron number(according to logarithmic analysis) of the electrode reaction was changed from 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 experimental results, a mechanism involving the disproportionation of an unstable inter-mediate was proposed for the reducton of eriochrome blue black B, and by this, the change of electron number with pH was explained.
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