Rapid, ultrasensitive, highly selective detection of toxic Hg (II) ions in seabass, swordfish and water samples

Abstract A novel fluorescent probe bearing triphenylamine, thiophene and thiosemicarbazide (TPA–TSC) was developed, and its distinct features were investigated. TPA–TSC demonstrated excellent selectivity towards Hg2+ ions, with a limit of detection (0.14 nM) among the lowest reported to date. It also exhibited a turn-off response by forming stable complex for a brief period (