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Indexed by:期刊论文

Date of Publication:2010-12-18

Journal:TETRAHEDRON

Included Journals:SCIE、Scopus

Volume:66

Issue:51

Page Number:9762-9768

ISSN No.:0040-4020

Key Words:Chemosensor; FRET; Rhodamine; Coumarin

Abstract:A system based on FRET mechanism, comprising a coumarin donor and a rhodamine acceptor, was developed for the selective and quantitative detection of metal ions. Fluorescent chemosensors RCs, linked by 1,2-diethylamine, exhibit significant fluorescence enhancement and excellent selectivity toward Cu(2+). Fluorescent probes CRB and CR6G, linked by hydrazide, function as ratiometric receptors for Cu(2+) chromogentically and fluorogentically in organic-aqueous media. Furthermore, the characteristic rhodamine-based fluorescence response of CRB (excitation at 550 nm) exhibits high selectivity for Hg(II). The construction of this kind of universal FRET system opens a broader prospect for future design of ratiometric fluorescent probes. (C) 2010 Published by Elsevier Ltd.