New complexes of lanthanide Ln(III), (Ln = La, Sm, Gd, Er) with Schiff bases derived from 2-furaldehyde and phenylenediamines

Abstract

Some new Schiff bases derivates from 2-furaldehyde and phenylenediamines (L 1–3) and their complexes with lanthanum (La), samarium (Sm), gadolinium (Gd) and erbium (Er) have been synthesized. These complexes with general formula [Ln(L 1–3) 2(NO 3) 2]NO 3· nH 2O (Ln = La, Sm, Gd, Er) were characterized by elemental analysis, UV–Vis, FT-IR and fluorescence spectroscopy, molar conductivity and thermal analysis. The metallic ions were found to be eight coordinated. The emission spectra of these complexes indicate the typical luminescence characteristics of the Sm(III), La(III), Er(III) and Gd(III) ions.