Yi-Bin Ruan, S. Maisonneuve, Juan Xie
Sep 1, 2011
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Influential Citations
66
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Journal
Dyes and Pigments
Abstract
Abstract 7-Nitrobenzo-2-oxa-1,3-diazole (NBD) derived compound 1 bearing triazole binding site was used as a selective fluorescent and colorimetric sensor for Hg 2+ in aqueous solution. Among the metal ions examined, only Hg 2+ caused significant fluorescence quenching in EtOH/HEPES (v/v = 9:1) at pH 7.4, along with a remarkable red shift in both absorption and fluorescence spectra which then facilitated naked-eye detection. 1 H NMR titration and control experiments by using more rigid triazolyl NBD derivative 2 were carried out to illustrate the complexation mode and the importance of cooperation of amino acid moiety and triazole ring in improving the binding ability of 1 to Hg 2+ .