A new highly selective chemosensor for the detection of iron ion in aqueous medium based on click generated triazole

A new click generated triazole based chemosensor 5 was designed and synthesized, that exhibits excellent selectivity for Fe+3 ion over a wide range of tested metal ions e.g. NH4+, Li+, Na+, K+, Cu+, Ag+, Ca+2, Ni+2, Co+2, Cd+2, Mg+2, Cu+2, Zn+2, Pb+2, Hg+2, In+3, La+3and Y+3 in an aqueous medium without any remarkable interference. With Fe+3, the sensor 5 showed enhancement in absorption intensity at wavelength of 262 nm. The sensor forms a host-guest complex in 1:1 stoichiometry with the detection limit down to 3.21 μM. The interaction was also confirmed by FT-IR, 1H NMR and FAB showing the Sensor 5-Fe+3 adduct at 495. Further, the sensor was successfully utilized to detect Fe+3 in human blood plasma and laboratory tap water as well.