COMPLEXES OF IRON(III) WITH LIGANDS OF BIOLOGICAL INTEREST - DOPAMINE AND 8-HYDROXYQUINOLINE-5-SULFONIC ACID

被引：47

作者：

GERARD, C

CHEHHAL, H

HUGEL, RP

机构：

来源：

POLYHEDRON | 1994年 / 13卷 / 04期

关键词：

D O I：

10.1016/s0277-5387(00)84736-1

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The composition and equilibrium constants of iron(III) complexes with two bidentate ligands: dopamine (H3L+) and 8-hydroxyquinoline-5-sulphonic acid (H2L), have been studied in aqueous solution (NaClO4 mu = 1) at 25-degrees-C, with protometric and spectrophotometric methods. With dopamine, seven complexes have been obtained in the pH range 0.5-12.0. In addition to the three stepwise complexes Fe(HL)n and the three deprotonated forms of Fe(HL)3, an acidic species Fe(H2L)3+ occurs in a large pH range (0-5). 8-hydroxyquinoline-5-sulphonic acid proves to be a very good chelating agent; up to pH = 7, it is better than dopamine and most catecholate ligands.

引用

页码：591 / 597

页数：7

共 21 条

[1] METAL CATION-LIGAND INTERACTIONS OF CATECHOLS OF BIOLOGICAL IMPORTANCE .1. STABILITY OF IRON(III) DIHYDROXYBENZAMIDE COMPLEXES WHICH ARE RELATED TO CEPHALOSPORINS BEARING AT C3'- A CATECHOL GROUP [J].