1-(2-Methoxybenzylidene)-4-phenylthiosemicarbazide as OFF–ON fluorescent chemodosimeter for detection of Cu 2+ in acetonitrile–water binary solvents

Z Liu, LR Lin, RB Huang, LS Zheng

Index: Liu, Zhao; Lin, Li-Rong; Huang, Rong-Bin; Zheng, Lan-Sun Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2008 , vol. 71, # 4 p. 1212 - 1215

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Citation Number: 13

Abstract

A novel fluorescent chemodosimeter, 1-(2-methoxybenzylidene)-4- phenylthiolsemicarbazide, was studied. In 90: 10 (v/v) mixture of CH3CN and water binary solution, it exhibits high selectivity toward Cu2+ but very low response toward other competitive cations. The Cu2+ promoting cyclization of the thiosemicarbazide to 1, 2, 4- triazole-3 (4H)-thione ring results in observation of the turn-on fluorescence.