期刊
ANALYTICA CHIMICA ACTA
卷 699, 期 2, 页码 198-205出版社
ELSEVIER
DOI: 10.1016/j.aca.2011.05.015
关键词
Dicyanostilbene; Lead; Cell-imaging; Two-photon fluorescence probe
资金
- China Postdoctoral Science Foundation [20100471224]
A novel two-photon fluorescence probe for Pb2+ derived from 4-methyl-2,5-dicyano-4'-amino stilbene as a two-photon fluorophore and bis12-(2-aminophenylsulfanyls)ethyl]amine as a novel Pb2+ ligand was developed. The probe possesses small molecule size, large two-photon absorption cross-section (1020 GM), noncytotoxic effect, long-wavelength emission at 609 nm, large Stokes shift (209 nm), excellent photostability, moderate water-solubility, good cell-permeability, and pH-insensitivity in the biologically relevant pH range. The probe can selectively detect Pb2+ ions in live cells and living tissues without interference from other metal ions and the membrane-bound probes, and its quenching constant (K-SV(TP)) is 7.58 x 10(5) M-1. (C) 2011 Elsevier B.V. All rights reserved.
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