NOVEL CRYPTAND CHROMOIONOPHORES FOR DETERMINATION OF LITHIUM IONS

被引：44

作者：

ZAZULAK, W ^{[1
]}

CHAPOTEAU, E ^{[1
]}

CZECH, BP ^{[1
]}

KUMAR, A ^{[1
]}

机构：

[1] MILES INC,TARRYTOWN,NY 10591

来源：

JOURNAL OF ORGANIC CHEMISTRY | 1992年 / 57卷 / 25期

关键词：

D O I：

10.1021/jo00051a010

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The syntheses and chromogenic properties of three novel chromogenic (p-nitrophenyl)azo-labeled cryptands 1-3, having inward-facing phenolic groups, are described. Cryptand chromoionophore 1 has the smallest cavity of the three cryptands and exhibits total selectivity for Li+ over Na+ ions in 10% aqueous diethylene glycol monoethyl ether (DEGMEE). The association constant of 3200 M-1 was obtained in 10% aqueous DEGMEE/TMA(OH) for the 1-.Li+ complex. Compound 1 is potentially applicable for the colorimetric analysis of lithium ions in largely aqueous solutions. The slightly larger chromoionophore 2, in which diaza-12-crown-4 moiety is connected with the aromatic subunit via three-carbon bridges, is highly selective for Li+ ions in the extraction mode and shows no cation response in homogeneous aqueous media. A larger analog of 1, chromogenic cryptand 3, which incorporates diaza-18-crown-6 moiety, exhibits K+ ion selectivity in aqueous solutions.

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页码：6720 / 6727

页数：8

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