Kinetics and Mechanism of Reduction of Iron (III) Kojic Acid Complex by Ascorbic Acid

被引：0

作者：

Hussain, Zahid ^{[1
]}

Nisar, Shazia ^{[2
]}

Kazmi, Syed Arif ^{[1
]}

机构：

[1] Univ Karachi, HEJ Res Inst Chem, Int Ctr Chem & Biol Sci, Karachi 75270, Pakistan

[2] Univ Karachi, Dept Chem, Karachi 75270, Pakistan

来源：

JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN | 2013年 / 35卷 / 03期

关键词：

Iron (III) Kojic acid complex; Reduction Kinetics; Mechanism; Ascorbic acid; COORDINATION CHEMISTRY; IRON(III) COMPLEX; METAL IONS; SIDEROPHORES; RELEASE; TRANSPORT; ENTEROBACTIN; ASPERGILLUS; THALASSEMIA; METABOLISM;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Kinetics of reduction of iron (III) kojic acid complex by ascorbic acid has been carried out using photodiode array spectrophotometer over the ranges: 4.0 <= pH <= 5.5 and 5.0 <= T <= 25.0 degrees C at ionic strength 0.2 M under pseudo-first order conditions by stopped-flow technique. Rate of the reaction was found to be pH dependent. The redox reaction followed the saturation kinetics. The rate law is deduced as follows: Rate = k(3)K(eq)[H+][HAsc(-)][Fe(KA)(3)]/[HKA] + K-eq[H+][HAsc(-)] The activation parameters of this reaction were determined. A mechanism consistent with this rate law has been proposed.

引用

页码：769 / 774

页数：6

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