Synthesis and structural analysis of copper(II) cysteine complexes

被引：82

作者：

Dokken, Kenneth M. ^{[1
]}

Parsons, Jason G. ^{[1
]}

McClure, John ^{[2
]}

Gardea-Torresdey, Jorge L. ^{[1
]}

机构：

[1] Univ Texas El Paso, Dept Chem, El Paso, TX 79968 USA

[2] Univ Texas El Paso, Dept Met & Mat Engn, El Paso, TX 79968 USA

来源：

INORGANICA CHIMICA ACTA | 2009年 / 362卷 / 02期

基金：

美国国家卫生研究院;

关键词：

Copper cysteine complexes; Infrared spectroscopy; X-ray diffraction; X-ray absorption spectroscopy; INFRARED-SPECTRA; AMINO-ACIDS; ABSORPTION;

D O I：

10.1016/j.ica.2008.04.037

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

This report describes the synthesis and structural analysis of stable copper(II) cysteine complexes. Pale pink copper(II) cysteine complexes were synthesized in mole ratios of 1:2, 1:4, and 1:6 of copper(II):cysteine in ethanol. Infrared spectroscopy and X-ray absorption spectroscopy con. firmed that copper(II) binding occurred via the thiol ligand of cysteine. XANES analysis showed that the oxidation state of copper remained as copper(II) and the local atomic geometry was similar in all of the cysteine complexes. The EXAFS data indicate that the copper(II) cysteine complexes are forming ring type structures with sulfur ligands from the cysteines acting as bridging ligands. X-ray diffraction revealed that the copper(II) cysteine complexes formed monoclinic cells with maximum crystallinity found in the 1:4 copper(II):cysteine complex. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：395 / 401

页数：7

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