A new fluorescent sensor selective for Pb2+ in water capable of two-photon-induced fluorescence measurement

• 来源期刊: 中国科学B辑（英文版）
• 年，卷（期）: 2009,（6）
• 页码范围: 780-785
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11426-009-0123-y

摘要

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 signifi-cant changes in one- and two-photon excited emission spectra: λmax 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(Φδ) is 51 GM (1 GM=1×10-50 cm4·S·photo-1·molecule-1)at 740 nm.