Vanadium(III) complexes with L-histidine in aqueous solution

被引：13

作者：

Bukietynska, K ^{[1
]}

Karwecka, Z ^{[1
]}

Podsiadly, H ^{[1
]}

机构：

[1] UNIV WROCLAW,FAC CHEM,PL-50383 WROCLAW,POLAND

来源：

POLYHEDRON | 1997年 / 16卷 / 15期

关键词：

vanadium(III); L-histidine; complexes; stability constants; aqueous solutions;

D O I：

10.1016/S0277-5387(96)00605-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complex compounds of vanadium(III) with L-histidine were studied using absorption, CD and potentiometric measurements in aqueous solutions. In solutions at pH 2-4.5 consecutive mononuclear species MLH, ML2H2, MLH2, ML2H4 and ML were observed and their stability constants were evaluated. More complex equilibria in the vanadium(III)-L-histidine system were observed at higher pH values, where mixed hydroxy- and/or ore-species appeared in solution. At pH 6-8.5 range V2OL4 species predominantly exists in solution. CD spectra has confirmed the low symmetry of this species, because of the distinct splitting of T-3(1g) --> t(3)T(2g)d-d transition of V-III. (C) 1997 Elsevier Science Ltd.

引用

页码：2613 / 2620

页数：8

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