期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 70, 期 5, 页码 1073-1078出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2007.10.015
关键词
Schiff base complexation; salophen; thermodynamic parameters; nonaqueous solvents
类别
The complexation reaction between Cu2+, Co2+ and Ni2+ metal cations with N.N'-bis(salicylidene)-1,2-phenylenediamine (salophen), in three nonaqueous polar solvents such as: acetonitrile (AN), dimethyl sulfoxide (DMSO), methanol (MeOH) and two binary mixtures of AN:DMSO and AN:MeOH at 25 degrees C were studied by spectrophotometric and conductometric methods. All investigated metal ions form 1:1 ML complex which their stability constants were determined and increase as Irving-Willianis stability order Co2+ < Ni2+ < Ni2+ < Cu2+ in all solvent systems except in the pure MeOH and binary mixture of AN:MeOH 20:80; in which, Ni2+ < Co2+ < Cu2+ was observed. The values of the thermodynamic parameters (Delta H degrees, Delta S degrees and Delta G degrees) for complexation reactions obtained from the temperature dependence of the stability constants and the results show that for all metal ion complexes, the value of Delta H degrees, Delta S degrees and Delta G degrees are solvent dependent. (C) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据