Cation complexing of crown ethers using fluorescence spectroscopy, part II

被引：23

作者：

Erk, Ç ^{[1
]}

Göçmen, A ^{[1
]}

机构：

[1] Istanbul Tech Univ, Dept Chem, Organ Chem Labs, TR-80626 Istanbul, Turkey

来源：

TALANTA | 2000年 / 53卷 / 01期

关键词：

macrocyclic ethers; cation binding; fluorescence spectroscopy; Mg2+; Li+; Na+;

D O I：

10.1016/S0039-9140(00)00374-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The complex formations of benzo[12]crown-4, benzo[15]crown-5 and benzo[18]crown-6 with perchlorate salts of Mg2+, Li+ and Na+ were investigated using the steady state fluorescence emission spectroscopy in acetonitrile. The complexation enhanced quenched fluorescence spectra, (CEQFS) exhibited the ion complexation role of the macrocyclic ethers and equilibrium constant, K-e of 1:1 stoichiometry were estimated. The K, were found in the order of Mg+ > Na+ > Li+ for benzo[15]crown-5 whilst Na+ > Mg+ > Li+ order was found with benzo[12]crown-4 at 298 K. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：137 / 140

页数：4

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