Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2008-09-25

Journal: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

Included Journals: Scopus、SCIE

Volume: 199

Issue: 2-3

Page Number: 144-149

ISSN: 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.