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Highly selective fluorescent and colorimetric sensor for Hg2+ based on triazole-linked NBD

Y.-B. Ruan, S. Maisonneuve and J. Xie Dyes and Pigments, 2011, 90 (3), 239-244

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 Hg2+ in aqueous solution. Among the metal ions examined, only Hg2+ 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. 1H 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 Hg2+.

Type :

Publication

Dates :

Paru le 13 janvier 2011

Informations complémentaires :

doi: 10.1016/j.dyepig.2011.01.004