EXAFS investigations of the mechanism of facilitated ion transfer into a room-temperature ionic liquid

被引：212

作者：

Jensen, MP ^{[1
]}

Dzielawa, JA ^{[1
]}

Rickert, P ^{[1
]}

Dietz, ML ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 36期

关键词：

D O I：

10.1021/ja027476y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The Sr(II)-crown ether complexes formed in a room-temperature ionic liquid (RTIL), 1-methyl-3-pentylimidazolium bis[(trifluoromethyl)sulfonyl]amide, have been studied by X-ray absorption fine structure measurements at the Sr K-edge. When a Sr(NO3)2-crown ether complex is directly dissolved in a water-saturated RTIL, both nitrate ligands and the crown ether coordinate the Sr, as observed in a conventional two-phase water-octanol system. When the cationic Sr-crown ether complex is created in a two-phase water-RTIL system, however, only cationic Sr-crown ether complexes are observed in the RTIL phase. This difference in the coordination complexes arises from differences in the mechanism of cation extraction between the RTIL and conventional molecular organic solvents, a finding with important implications for synthesis, catalysis, and ion separations using two-phase water-RTIL systems. Copyright © 2002 American Chemical Society.

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页码：10664 / 10665

页数：2

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