4-salicylideneamino-3-methyl-1,2,4-triazole-5-thione [30–32] (Schematic preparation of R1, Fig. 1), was found to recognize F− and AcO− anions selectively even at lower detection limits, has the added advantage of its simple one step synthesis and high yields. We have previously demonstrated the excellent efficiency of this molecule as a selective aniline receptor [31] however there is no colorimetric effect in that case which is an added advantage for this molecule when it comes to a solution containing different organic pollutants. Also it possesses multiple binding sites particularly phenolic OH and amide NH groups, these functional groups are well-known to be involved in natural anion-binding sites of peptides [4,5] and have been extensively employed in developing anion receptors [33–35]