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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (7): 650-655. 上一篇    下一篇

研究论文

铌(V)-酒石酸-2-(5'-溴-2'-吡啶偶氮)-5-二乙氨基苯酚三元配便物的汞电极上的吸附

金文睿;杨清峰;买光昕;王淑仁   

  1. 山东大学化学系
  • 发布日期:1989-07-15

The adsorption of the complex of niobium(V) with tartaric acid and 2-(5'-bromo-2'-pyridylazo)-5-diethylaminophenol at the hanging mercury drop electrode

JIN WENRUI;YANG QINGFENG;MAI GUANGXIN;WANG SHUREN   

  • Published:1989-07-15

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本文用线性变势吸附伏安法研究了铌(V)-酒石酸-2-(5'-溴-2'-吡啶偶氮)-5-二乙氨基苯酚三元配合物在汞电极上的电吸附性质, 测定了表面浓度, 讨论了吸附浓度的表达式及其与吸附时间、金属离子浓度、配位体浓度的关系, 验证了吸附量与电极面积及还原峰电流的关系。证明了配合物在电极上的还原是一个可逆吸附的还原过程。

关键词: 苯酚 P, 伏安法, 数据处理, 吸附, 浓度, 酒石酸, 三元络合物, 还原反应, 吡啶偶氮化合物, 电化学反应

The adsorption was studied of a Nb(V) ternary complex with tartaric acid and 2-(5'-bromo-2'-pyridylazo)-5-(diethylamino)phenol (I) by a hanging Hg drop electrode in H2SO4. This complex can be adsorbed at potentials between +0.03 and -0.10 V vs. SCE. Reduction of the adsorbed complex proceeds reversibly. An equation is given for the concentration of the complex and its reduction product for adsorptive voltammetry, depending on the diffusion coefficient and the stability constant in the Nb complex, the diffusion layer thickness, and the concentration of free Nb and I in solution

Key words: PHENOL P, VOLTAMMETRY, DATA HANDLING, ADSORPTION, CONCENTRATION, TARTARIC ACID, TERNARY COMPLEX, REDUCTION REACTION, PYRIDINE AZO COMPOUNDS, ELECTROCHEMICAL REACTION

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