4-Salicylideneamino-3-methyl-1,2,4-triazole-5-thione as a sensor for aniline recognition

► 4-Salicylideneamino-3-methyl-1,2,4-triazole-5-thione has a highly optical sensitivity towards aniline. ► The sensitivity does not change even in competing solvents. ► The compound does not sense F-unlike other known Schiff base sensors for fluoride ion.