TRAPPING OF AG+ AND CS+ BY A CROWN-ETHER POLYMER STUDIED BY EXAFS

被引：10

作者：

BENIERE, F

BERTRU, N

CATLOW, CRA

COLE, M

SIMONET, J

ANGELY, L

机构：

[1] UCL ROYAL INST GREAT BRITAIN, LONDON, ENGLAND

[2] UNIV RENNES 1, ELECTROCHIM ORGAN LAB, CNRS, UA 439, F-35042 RENNES, FRANCE

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1992年 / 53卷 / 03期

关键词：

CROWN-ETHER POLYMER; ION EXTRACTION; EXAFS OF METAL IONS; CROWN-ETHER STRUCTURE; COMPLEXATION;

D O I：

10.1016/0022-3697(92)90180-L

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polymeric crown-ethers are expected to exhibit the remarkable complexing properties of the crown ether molecules with the further advantage of being able to be fabricated as a plastic membrane. The structure of poly(dibenzo-18-crown-6) doped with the metallic cations Ag+ and Cs+ has been examined by EXAFS. The silver ion is found at the middle of the ring formed by the six oxygen and 12 r-arbon atoms. The cesium ion is slightly off this position on a line perpendicular to the crown. In both cases the six oxygen nearest neighbours are split into two sub-shells of two and four atoms. A three-dimensional structure is suggested for the neutral polymer.

引用

页码：449 / 457

页数：9

共 20 条

[1]

ANGELY L, 1990, NEW J CHEM, V14, P841

[2]

BLASIUS E, 1979, J CHROMATOGR, V167, P307

[3] AN EXAFS STUDY OF THE STRUCTURE OF RUBIDIUM POLYETHYLENEOXIDE SALT COMPLEXES [J].