Oscillator Strength and Intensity Parameters of Sm(III), Ho(III) and Er(III) Metal Complexes with Some Schiff Base Ligand

摘要

The absorption spectra of Schiff base ligands, o-(alpha-benzoyl-methylbenzenylideneimino) benzoic acid (H_2AD), o-(alpha-2-oxopropylbenzylideneimino) benzoic acid (H_2AB), o-(alpha-2-oxophenylidene-imino) benzoic acid (H_2AA), 2-(alpha-oxopropylbenzylideneimino) imono) propanoc acid (H_2BD), 2-(alpha-2-oxopropylbenzylideneimino) propanoic acid (H_2BB) and 3-(alpha-2-oxopentylideneimino) propanoic acid (H_BA) with Sm(III), Ho(III) and Er(III) ions have been studied in different metal-ligand stoichiometry in 20% dioxane-water medium. The oscillator determined from the absortion spectra. The intensity parameters T_lambda (lambda = 2,4,6) for all the complexes were evaluated by applying the Judd-Ofelt theorem to the observed obcillator strengths. The values of the intensity parameters are compared and discussed to investigate the sensitivity of the intensity parameters to the ligand environment.