ELECTROCHEMICAL RECOGNITION OF GROUP-1 AND GROUP-2 METAL-CATIONS BY REDOX-ACTIVE IONOPHORES

被引：35

作者：

BEER, PD ^{[1
]}

CHEN, Z ^{[1
]}

DREW, MGB ^{[1
]}

PILGRIM, AJ ^{[1
]}

机构：

[1] UNIV READING,DEPT CHEM,READING RG6 2AD,BERKS,ENGLAND

来源：

INORGANICA CHIMICA ACTA | 1994年 / 225卷 / 1-2期

关键词：

ELECTROCHEMISTRY; CRYSTAL STRUCTURES; FERROCENE COMPLEXES; CROWN ETHER COMPLEXES;

D O I：

10.1016/0020-1693(94)04040-0

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

New ferrocene bis(aza-crown ethers) 6 and 7 have been synthesised in which a ferrocene redox centre bridges the two aza-crown ether moieties, linked via methylene covalent bonds. Coordination chemical investigations revealed both ligands to form complexes with sodium, potassium, magnesium and barium cations. Single crystal X-ray structures of 4 and the [6.2K(+)](PF6-)(2) complex have also been determined. Electrochemical investigations have demonstrated that the binding of Na+, K+, Mg2+ and Ba2+ guest cations by 6 and 7 results in shifts of the respective ferrocene-ferrocenium redox couple to more positive potentials. The magnitude of these one-wave anodic shifts is related to the charge:radius ratio of the cationic guest species. Electrochemical recognition competition experiments suggest 6 exhibits a degree of selectivity for the Ba2+ cation.

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页码：137 / 144

页数：8

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