Electrochemical behaviour of isomers of a tetraazamacrocyclic Ni(II) complex in solutions saturated with argon, CO and CO2

被引:15
作者
Bujno, K
Bilewicz, R
Siegfried, L
Kaden, T
机构
[1] UNIV WARSAW,DEPT CHEM,PL-02093 WARSAW,POLAND
[2] INST INORGAN CHEM,CH-4056 BASEL,SWITZERLAND
来源
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1996年 / 407卷 / 1-2期
关键词
Ni(CRH)](2+); isomers; saturated solution; argon; carbon monoxide; carbon dioxide;
D O I
10.1016/0022-0728(95)04501-5
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Isomers of [Ni(CRH)](2+) have been isolated and studied by d.c. and a.c. voltammetry on mercury electrodes in aqueous solution. The configurational isomers of [Ni(CRH)](2+) were found to differ in their stability in the solution and the isomerization process was monitored voltammetrically. The adsorptivity of the isomer A on mercury electrodes was found to be stronger than that of the isomer B, while no differences were seen for the adsorbed Ni(I) complexes. The solution resident [Ni(CRH)](+) complexes are more labile than the corresponding Ni(II) compounds, hence upon reduction the isomer B undergoes fast transformation into the more stable isomer A. The electroreduction of [Ni(CRH)](2+) in the presence of CO and CO2 is described and the influence of the isomeric form used in the processes is discussed.
引用
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页码:131 / 140
页数:10
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