Abstract
The Schiff base complexes of Nd(III) have been synthesized and characterized by analytical, magnetic, electronic and IR spectral studies. The values of Slater-Condon ( F k ), Racah ( E k ) interelectronic repulsion, Lande ( ζ 4 f ) spin-orbit interaction and oscillator strength ( P), Judd-Ofelt ( τ λ ) intensity parameters have been calculated. Using these parameters energies and intensity of ten levels in each of the six complexes in the region 360–1000 nm have been computed. The agreement between the computed and experimental values is good. The variation of all the parameters in the complexes from the corresponding Nd(III) free ion parameter has been discussed. Using F 2 values, the nephelauxetic ratio β and bonding parameter b 1 2 have been calculated which infer the incidence of some covalent character of these complexes. The intensity of hypersensitive transition is found to increase with the increase of covalency. The IR spectra of the complexes have been recorded in the region 4000-400 cm −1. The assignments to different modes of vibrations and their shifts support the complexation.
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