摘要
A simple,convenient“turn on”fluorescent and chromogenic chemosensor for fluoride anion detection in acetonitrile as well as in water has been developed.This probe shows high selectivity and good sensitivity towards fluoride ions.The fluoride-triggered phenolic O-H bond cleavage and hydrogen bonding between the NH group have been mechanistically investigated on the basis of spectral titration with TBAOH,^(1)H NMR and density functional theory(DFT)studies.The colorimetric sensing of 2-(bis((4-(ptolyl)thiazole-2-yl)amino)methyl)phenol(BTA)was successfully utilized in the preparation of solid support silica for real sample analysis to detect F-ions.The detection limit for F-was found to be 4.1×10^(-7)M and the binding stoichiometry was proposed to be 1:2 based on the Job’s plot and^(1)H NMR spectroscopic techniques.
