Electrochemical oxidation and adsorption of hematoxylin at glassy carbon electrode in various pH values

被引：10

作者：

Beiginejad, Hadi ^{[1
]}

Nematollahi, Davood ^{[1
]}

Noroozi, Mohammad ^{[2
]}

Lotfi, Shahram ^{[3
]}

机构：

[1] Bu Ali Sina Univ, Fac Chem, Hamadan 6517838683, Iran

[2] RIPI, Kermanshah, Iran

[3] Payame Noor Univ, Fac Chem, Tehran, Iran

来源：

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY | 2015年 / 12卷 / 02期

关键词：

Hematoxylin; Adsorption; Cyclic voltammetry; Orientation; Chronocoulometry; MULTIWAVELENGTH SPECTROPHOTOMETRIC DETERMINATION; ACIDITY CONSTANTS; DIHYDROXYBENZENE DERIVATIVES; PROTOLYTIC CONSTANTS; PLUS WATER; HEMATEIN; 4-(2-PYRIDYLAZO)RESORCINOL; COMPONENTS; COMPLEXES; SOLVENTS;

D O I：

10.1007/s13738-014-0487-6

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electrochemical oxidation of hematoxylin has been studied using cyclic voltammetry, differential pulse voltammetry, chronocoulometry and controlled potential coulometry. It indicates that not only electrochemical behavior of hematoxylin depends on the pH, but also its behavior depends on the concentration. The adsorption activity of hematoxylin and its oxidation products on the surface of the glassy carbon electrode was found to vary in the order hematox[hematein[hematoxylin. In addition, it is found that adsorption of hematoxylin depends on the pH and increases with decreasing pH. It is also found that at pHs lower than pK(a1), the adsorption of hematoxylin on the surface of the glassy carbon electrode is high. Furthermore, the orientation of adsorbed hematoxylin on the surface of glassy carbon electrode was estimated. The results show that the orientation of adsorbed hematoxylin molecules at glassy carbon surface is endwise.

引用

页码：325 / 333

页数：9

共 43 条

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