Tris-triazole based chemosensors for selective sensing of Pb2+ ions

Abstract

A series of novel tris-trizole based neutral chemosensors (4a-c) have been synthesized via click reaction and characterized by various spectral techniques. All the synthesized triazoles were evaluated for their ion binding properties towards various cations (Cu2+, Zn2+, Ca2+, Co2+, Cd2+, Hg2+, Pb2+ and Ni2+) by UV-visible titration experiments. It was observed that the addition of Pb2+ ions to compound 4a led to significant changes in UV-visible spectrum and a new UV band was observed at 262 nm. Further, the Job′s plot confirmed the formation of 1:1 complex between compound 4a and Pb2+. The synthesized chemosensor selectively sense Pb2+ ions in preference to other cations like Cu2+, Zn2+, Ca2+, Co2+, Cd2+, Hg2+, Pb2+ and Ni2+