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

Some new Schiff bases derivates from 2-furaldehyde and phenylenediamines (L1–3) and their complexes with lanthanum (La), samarium (Sm), gadolinium (Gd) and erbium (Er) have been synthesized. These complexes with general formula [Ln(L1–3)2(NO3)2]NO3·nH2O (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.

The complexes of Schiff bases derived from 2-furaldehyde and phenylenediamines with lanthanum, samarium, gadolinium and erbium, with the general formula [Ln(L1–3)2(NO3)2]NO3·nH2O (Ln = La, Sm, Gd, Er), were synthesised and characterized by elemental analysis, UV–Vis, FT-IR and fluorescence spectroscopy, mass spectrometry, molar conductivity and thermal analysis. The erbium and samarium complexes are distinguished by interesting fluorescence properties.Figure optionsDownload as PowerPoint slideHighlights
► The Schiff bases derivated from 2-furaldehyde and phenylenediamines were synthesized.
► Their complexes with lanthanides (La, Sm, Gd, Er) were obtained.
► The complexes were analyzed and confirmed by different methods.
► The erbium and samarium complexes distinguish by interesting fluorescence properties.