Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 162, Issue 1, Pages 391-395Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.12.060
Keywords
Fluorescence probe; 7-Hydroxycoumarin; Hg2+ selectivity; Off-on; Aqueous media
Funding
- Specialized Research Fund for the Doctoral Program of Higher Education [20100041120020]
- Fundamental Research Funds for the Central Universities [DUT11LK13]
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A simple 7-hydroxycoumarin-basecl compound L1 was rationally designed and synthesized behaving as a highly selective fluorescent sensor for Hg2+ in aqueous media. It shows selective and turn-on fluorescence upon addition of Hg2+. Fluorescence titration and H-1 NMR investigation reveal that the fluorescence enhancement of L1 upon Hg2+ addition is promoted by Hg2+-induced cyclization of L1 to a more rigid dihydrobenzofuran derivative. (C) 2011 Elsevier B.V. All rights reserved.
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