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Indexed by:期刊论文

Date of Publication:2012-02-20

Journal:SENSORS AND ACTUATORS B-CHEMICAL

Included Journals:SCIE、EI

Volume:162

Issue:1

Page Number:391-395

ISSN No.: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.