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论文类型：期刊论文

发表时间：2008-09-25

发表刊物：JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

收录刊物：SCIE、Scopus

卷号：199

期号：2-3

页面范围：144-149

ISSN号：1010-6030

关键字：fluorophore; two-photon absorption cross-section; ionophore; sensor; twin-cyano stilbene

摘要：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.