A highly selective fluorescent chemosensor for H2PO4- based on a calix[4]arene tetraamide derivative

被引：46

作者：

Chen, QY

Chen, CF ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Biol Chem Lab, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China

来源：

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY | 2005年 / 2005卷 / 12期

关键词：

calixarenes; chemosensors; dihydrogen phosphate; fluorescence; sulfonamides;

D O I：

10.1002/ejoc.200400832

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A new neutral fluorescent chemosensor 5 based on a calix[4]arene tetraamide derivative has been synthesized. It exhibits high selectivity for H2PO4- over a wide range of anions, and the selectivity for H2PO4- is more than 2700-fold higher than for F-. In acetonitrile, the fluorescence intensity of 5 is efficiently enhanced about 130% [(I-I-0)/I-0] upon the addition of 5 equiv. of H2PO4-. From the fluorescence titration experiments, the association constant for 5/H2PO4- (1:2) was calculated to be 5.48 x 10(9)M(-2). Furthermore, the H-1 NMR spectral and X-ray crystal studies suggested that multiple hydrogen-bonding interactions occur between 5 and H2PO4-.

引用

页码：2468 / 2472

页数：5

共 38 条

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