Selective Speciation of Ferric Iron by a New Heterocyclic Ligand

The synthesis and analytical applications of the new heterocyclic ligand are described. The complexation reaction of the ligand with some cations was studied in aqueous methanol at room temperature using the spectrophotometric method. Results revealed that only the absorption spectra of the Fe (III)–ligand complex show a high redshift of the absorption maximum in the aqueous methanol solution and the compound reacts with Fe (III) to produce a deep green complex (1:2 mol ratio of Fe(III)/ligand). Furthermore, a highly sensitive, selective and rapid spectrophotometric method is described for the determination of trace amounts of Fe (III) by using the ligand.