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. NH 4 + , 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 +3 and 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, 1 H 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.