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.
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页码：769 / 774
页数：6
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