EFFECT OF STRUCTURAL VARIATIONS WITHIN LIPOPHILIC DIBENZOCROWN ETHER CARBOXYLIC-ACIDS ON THE SELECTIVITY AND EFFICIENCY OF COMPETITIVE ALKALI-METAL CATION SOLVENT-EXTRACTION INTO CHLOROFORM

被引：61

作者：

WALKOWIAK, W ^{[1
]}

CHAREWICZ, WA ^{[1
]}

KANG, SI ^{[1
]}

YANG, IW ^{[1
]}

PUGIA, MJ ^{[1
]}

BARTSCH, RA ^{[1
]}

机构：

[1] TEXAS TECH UNIV,DEPT CHEM & BIOCHEM,LUBBOCK,TX 79409

来源：

ANALYTICAL CHEMISTRY | 1990年 / 62卷 / 18期

关键词：

D O I：

10.1021/ac00217a022

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Competitive solvent extraction of alkali-metal cations from aqueous solutions into chloroform by a series of lipophilic dibenzocrown ethers with pendant carboxylic acid groups has been investigated. Both the extraction selectivity and efficiency are Influenced by variations of the crown ether ring size and the attachment site of the lipophilic group. Preor-ganization of the binding site by proper positioning of the lipophilic group enhances extraction selectivity. Very high Na+ extraction selectivity (Na+/K+ = 32, Na+/LI+ = 66 and no detectable extraction of Rb+ or Cs+) was obtained with sym -decyldlbenzo-16-crown-5-oxyacetic acid. © 1990, American Chemical Society. All rights reserved.

引用

页码：2018 / 2021

页数：4

共 13 条

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