Release Time:2019-03-09  Hits:

Indexed by: Journal Article

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: 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.