Adsorption and structure of copper(II) complexes on a silica gel surface chemically modified with 2-aminothiazole

被引：19

作者：

Dias, NL ^{[1
]}

机构：

[1] Univ Estadual Paulista, UNESP, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil

来源：

POLYHEDRON | 1999年 / 18卷 / 17期

基金：

巴西圣保罗研究基金会;

关键词：

2-aminothiazole; modified silica gel; electron spin resonance; copper complexes with 2-aminothiazole; copper complexes; isotherms of adsorption of CuX2;

D O I：

10.1016/S0277-5387(99)00125-4

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The isotherms of adsorption of CuX2 (X=Cl-, Br-, ClO4-) by silica gel chemically modified with 2-aminothiazole were studied in acetone and EtOH solutions, at 25 degrees C. The 2-aminothiazole molecule, covalently bond to the silica gel surface, adsorbs CuX2 from solvent by forming a surface complex. At low loading, the electronic and E.S.R. spectral parameters indicate that the Cu2+ complexes have a distorted tetragonal symmetry. The d-d eletronic transition spectra show that for ClO4- complex, the peak of absorption do not change for any degree of metal loading whilst for Cl- and Br- complexes, the peak maxima shift to higher energy with lower metal loading. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2241 / 2247

页数：7

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