Organic & biomolecular chemistry

A ratiometric fluorescent sensor for phosphates: Zn 2+-enhanced ICT and ligand competition

X Peng, Y Xu, S Sun, Y Wu, J Fan

Index: Peng, Xiaojun; Xu, Yongqian; Sun, Shiguo; Wu, Yunkou; Fan, Jiangli Organic and Biomolecular Chemistry, 2007 , vol. 5, # 2 p. 226 - 228

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Citation Number: 75

Abstract

A pyrene–terpyridine–Zn conjugate has been synthesized and characterized, where Zn2+ acts as an electron acceptor to enhance molecular ICT with a large emission red-shift (> 100 nm). It showed a ratiometric fluorescence change upon addition of phosphate anions in buffered aqueous solution. The selective response to phosphates or pyrophosphates involved ICT and ligand competition processes.