Evaluation of anion selectivity in protic media by squaramide-Cresol Red ensembles

被引：41

作者：

Piña, MN ^{[1
]}

Rotger, MC ^{[1
]}

Costa, A ^{[1
]}

Ballester, P ^{[1
]}

Deyà, PM ^{[1
]}

机构：

[1] Univ Illes Balears, Dept Quim, Palma de Mallorca 07122, Spain

来源：

TETRAHEDRON LETTERS | 2004年 / 45卷 / 19期

关键词：

molecular sensor; squaramides; anion recognition; colorimetric ensembles; Cresol Red;

D O I：

10.1016/j.tetlet.2004.03.094

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A new series of positively charged squaramide-ammonium compounds 1-6 bind Sulfate and hydrogen phosphate in ethanol-water mixtures by a combination of electrostatic and hydrogen bonding interactions. A sensing ensemble composed of Cresol Red and an squaramide receptor signals the association events of these anions. Competitive experiments in ethanol-water mixtures (9:1) reveal a moderate selectivity for sulfate over hydrogen phosphate and Suggest that squaramide 4, featuring all intermediate distance between squaramide Subunits, is better suited for complexation of sulfate. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：3749 / 3752

页数：4

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