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Indexed by:期刊论文

Date of Publication:2008-09-25

Journal:JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

Included Journals:SCIE、Scopus

Volume:199

Issue:2-3

Page Number:144-149

ISSN No.:1010-6030

Key Words:fluorophore; two-photon absorption cross-section; ionophore; sensor; twin-cyano stilbene

Abstract:The fluorophore derived from stilbene with two cyano groups in a single aromatic ring shows reasonably large two-photon absorption cross-section and emits strong two-photon fluorescence. A water-soluble two-photon sensor composed of the fluorophore containing bis[2-(2-hydroxyethylsulfanyl)ethyl]amino group (ionophore) has a very high sensitivity and selectivity for Hg2+ in water. It can be used to detect trace Hg2+ in near neutral aqueous solution (pH > 6.5), and its binding constant (log K) for Hg2+ is as high as 5.72 +/- 0.03. Nitrogen atom property and the sulfur atom number on the ionophore are believed to be responsible for the unique selectivity of probe 1 for Hg2+. (C) 2008 Elsevier B.V. All rights reserved.