Voltammetric investigation of iron(III) complexes with siderophore chrysobactin in aqueous solution

被引：13

作者：

Vukosav, Petra ^{[1
]}

Frkanec, Leo ^{[2
]}

Mlakar, Marina ^{[1
]}

机构：

[1] Rudjer Boskovic Inst, Div Marine & Environm Res, Zagreb 10000, Croatia

[2] Rudjer Boskovic Inst, Div Organ Chem & Biochem, Zagreb 10000, Croatia

来源：

ELECTROCHIMICA ACTA | 2012年 / 59卷

关键词：

Iron(III); Siderophore; Chrysobactin; Redox potential; Voltammetry; SQUARE-WAVE VOLTAMMETRY; CATHODIC STRIPPING VOLTAMMETRY; ERWINIA-CHRYSANTHEMI; BIOCHEMICAL PROCESSES; STABILITY-CONSTANTS; IRON; CHEMISTRY; CATECHOL; RELEASE;

D O I：

10.1016/j.electacta.2011.11.031

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Voltammetric investigations of iron(III)-chrysobactin complexes in aqueous solution at static mercury electrode, were performed. With c(Fe) = (0.5-30) x 10(-7) mol dm(-3) and C-cb = (0.5-100) x 10(-7) mol dm(-3) in pH range 6.7-10, reduction peaks with E-p -0.64 to -0.74V ((1) under bar) and E-p -0.50 to -0.62V ((2) under bar) vs. Ag/AgCl, were registered. These reduction processes were time dependent as well as solution composition (c(Fe), c(Cb) and pH). Complexes are adsorbed at the mercury drop surface. Presumed stoichiometry of the detected complexes was (FeCb3)-Cb-III ((1) under bar) and (FeCb2)-Cb-III(OH)(x) ((2) under bar). Their formation/dissociation processes were described. These investigations are of biological importance as well, since provide an insight into possible reduction mechanism in the bacterial cells that use chrysobactin to acquire the iron. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：479 / 484

页数：6

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