An efficient thiourea-based colorimetric chemosensor for naked-eye recognition of fluoride and acetate anions: UV–vis and 1HNMR studies

An efficient colorimetric chemosensor with a thiourea binding site and 2-amino-6-nitrobenothiazole as a signaling unit has been synthesized by dithiocarbamate approach. The chemosensor has been utilized for selective recognition of fluoride and acetate anions in dry DMSO solution by UV–vis and 1H NMR titration experiments. The chemosensor has shown naked-eye sensitivity for both the anions in solution.