Issue 23, 2011
From the journal:

Organic & Biomolecular Chemistry

Dual-mode unsymmetrical squaraine-based sensor for selective detection of Hg2+ in aqueous media†

Cheng Chen,a   Haijun Dong,a   Yaqing Chen,a   Liangqia Guo,a   Zhenyu Wang,a   Jian-Jun Suna  and  Nanyan Fu*a  

* Corresponding authors

a Key Laboratory of Analysis and Detection for Food Safety, Ministry of Education & Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, P. R. China
E-mail: nanyan_fu@fzu.edu.cn
Tel: + 86-13459108842

Abstract

A novel chemosensor based on unsymmetrical squaraine dye (USQ-1) for the selective detection of Hg2+ in aqueous media is described. USQ-1 in combination with metal ions shows dual chromogenic and “turn-on” fluorogenic response selectivity toward Hg2+ as compared to Li+, Na+, K+, Mg2+, Ca2+, Ba2+, Al3+, Cu2+, Cd2+, Mn2+, Fe3+, Ag+, Pb2+, Zn2+, Ni2+ and Co2+ due to the Hg2+-induced deaggregation of the dye molecule. A recognition mechanism based on the binding mode is proposed based on the absorption and fluorescence changes, 1H NMR titration experiments, ESI-MS study, and theoretical calculations.

Graphical abstract: Dual-mode unsymmetrical squaraine-based sensor for selective detection of Hg2+ in aqueous media

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Supplementary files

Article information

DOI
https://doi.org/10.1039/C1OB06519J
Article type
Paper
Submitted
04 Sep 2011
Accepted
03 Oct 2011
First published
04 Oct 2011

Org. Biomol. Chem., 2011,9, 8195-8201

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Dual-mode unsymmetrical squaraine-based sensor for selective detection of Hg2+ in aqueous media

C. Chen, H. Dong, Y. Chen, L. Guo, Z. Wang, J. Sun and N. Fu, Org. Biomol. Chem., 2011, 9, 8195 DOI: 10.1039/C1OB06519J

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