Electronic spectral study of amino-acid complexes of Nd(III)

Abstract

Neodymium(III) complexes with histidine and diols (ethancdiol, prop-1,2-diol. but-2,3-diol, 2-butene-1,4-cliol, pent-1,5-diol, and hex-1,6-diol) of the type MAB, MA2B, and MAB2 have been synthesized and characterised. The values of Slater–Condon (Fk), Lande (ζ4f) spin orbital interactions, oscillator strength (P). and Judd–Ofelt (Tλ) intensity parameters have been calculated. Using these parameters, energies and intensities often levels in all the complexes in the region 360–920 nm have been computed. The agreement between the computed and experimental values is good. Using F2 values, the nephelauxetic ratio β, and bonding parameter b1/2 have been calculated, these infer the incidence of some covalent character in these complexes.

Calculation and Comparison of Energy Interaction and Intensity Parameters for the Interaction of Nd(III) with DL-Valine, DL-Alanine and β-Alanine in Presence and Absence of Ca2+/Zn<

“…Lanthanide elements have extensive application in industries, agriculture, and biomolecular reactions, so it has become very important to understand the behaviour of trivalent lanthanide ions in biological system [1,2]. The co-ordination chemistry of lanthanide in solution state has become more important with the increase use of lanthanides as probes in the exploration of the structural function of biomolecular reactions [3][4][5][6] specially due to its ability to replace Ca(II) in a specific manner [7][8][9][10]. In our previous study [11], we have reported the interaction of Pr(III) with amino acids in aqueous and different aquated organic solvents by using 4f-4f absorption spectra as probes and thereby calculating energy interaction parameters like Slater-Condon (F K ) factor, Racah (E k ), Lande factor (ξ 4f ), nephelauxetic ratio (β), bonding (b 1/2 ), percentage covalency (δ), and parameters like calculated values of oscillator strength (P) and computed values of electric dipole intensity parameters, T λ (λ = 2, 4, 6).…”