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Indexed by:期刊论文

Date of Publication:2009-06-01

Journal:SCIENCE IN CHINA SERIES B-CHEMISTRY

Included Journals:EI、SCIE

Volume:52

Issue:6

Page Number:780-785

ISSN No.:1006-9291

Key Words:two-photon; fluorescent sensor; lead ion; aqueous environment; two-photon action cross section; chemosensor; sensor

Abstract:A new fluorescent sensor (1) for Pb2+ containing a 1,4-dicyano-2,5-bis(styryl)benzene fluorophore and 2-(N,N'-bis(carboxylmethyl))amino-1-carboxylmethoxylbenzene as receptor has been synthesized. The sensor selectively responds to Pb2+ in the aqueous environment, and brings about similar and significant changes in one- and two-photon excited emission spectra: lambda (max) red-shift from 460 (519) to 590 nm. The selective response is pH-independent in a large physiological pH range, and two-photon action cross section (Phi delta) is 51 GM (1 GM = 1x10(-50) cm(4)center dot s center dot photon(-1)center dot molecule(-1)) at 740 nm.