Novel cryptand chromoionophores for determination of lithium ions

W Zazulak, E Chapoteau, BP Czech…

文献索引：Zazulak, Wolodymyr; Chapoteau, Eddy; Czech, Bronislaw P.; Kumar, Anand Journal of Organic Chemistry, 1992 , vol. 57, # 25 p. 6720 - 6727

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被引用次数: 41

摘要

The syntheses and chromogenic properties of three novel chromogenic (p-nitropheny1) 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-'was obtained in 10% aqueous DEGMEE/ ...