Hg2+-selective fluoroionophore of p-tert-butylcalix[4]arene-diaza-crown ether having pyrenylacetamide subunits

被引：67

作者：

Kim, JH ^{[1
]}

Hwang, AR ^{[1
]}

Chang, SK ^{[1
]}

机构：

[1] Chung Ang Univ, Dept Chem, Seoul 156756, South Korea

来源：

TETRAHEDRON LETTERS | 2004年 / 45卷 / 41期

关键词：

calix-aza-crown ether; fluoroionophore; pyrene; Hg2+ selectivity; ON-OFF type switching;

D O I：

10.1016/j.tetlet.2004.08.125

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A new ionophore having two pyrenylacetamide moieties based on the p-tert-butylcalix[4]arene-diaza-crown ether has been prepared and its fluoroionophoric properties were investigated. Bis(pyrenyl) derivative was found to exhibit selective ON-OFF type sensing behaviour toward Hg2+ ions over other representative transition and heavy metal ions. The fluorescence quenching efficiency of larger than 20-fold was observed with 100equiv of Hg2+ ions and the association constant was found to be 4.5 x 10(4) M-1 in methanol. The ionophore also exhibited a very efficient quenching of excimer fluorescence selectively upon treatment with Hg2+ ions in 50% aqueous methanol solution. The observed Hg2+ -selective ON-OFF type fluorescence behaviour could be utilized as efficient sensing and switching devices for the design of other supramolecular systems. (C) 2004 Elsevier Ltd. All rights reserved.

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收藏

页码：7557 / 7561

页数：5

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