SIDEROPHORE CHEMISTRY OF VANADIUM - KINETICS AND EQUILIBRIUM OF INTERACTION BETWEEN VANADIUM(IV) AND DESFERRIOXAMINE-B IN AQUEOUS ACIDIC SOLUTIONS

被引：23

作者：

BATINICHABERLE, I ^{[1
]}

BIRUS, M ^{[1
]}

PRIBANIC, M ^{[1
]}

机构：

[1] UNIV ZAGREB, FAC PHARM & BIOCHEM, DEPT CHEM, YU-41000 ZAGREB, CROATIA

来源：

INORGANIC CHEMISTRY | 1991年 / 30卷 / 26期

关键词：

D O I：

10.1021/ic00026a007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The kinetics and equilibrium of interaction between vanadyl sulfate and a natural trihydroxamate-based siderophore, desferrioxamine B methanesulfonate, were studied spectrophotometrically in acidic aqueous perchlorate solutions of 2.0 M ionic strength. The bi-, tetra-, and hexadentate-bonded complexes were formed under these conditions, and their stability constants were calculated. The rate constants for the formation and hydrolysis of the bi- and tetradentate complexes were estimated. The formation of the bidentate complex proceeds via two parallel pathways involving the hydrolyzed and unhydrolyzed vanadyl-aquo species. The hydrolyzed form was found to react with the siderophore ca. 10(5) times faster than the unhydrolyzed form.

引用

页码：4882 / 4887

页数：6

共 38 条

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