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Indexed by: Journal Article

Date of Publication: 2012-02-20

Journal: SENSORS AND ACTUATORS B-CHEMICAL

Included Journals: EI、SCIE

Volume: 162

Issue: 1

Page Number: 391-395

ISSN: 0925-4005

Key Words: Fluorescence probe; 7-Hydroxycoumarin; Hg2+ selectivity; Off-on; Aqueous media

Abstract: 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.