Comparison of electric-dipole intensity parameters for a series of structurally related neodymium, holmium, and erbium complexes in aqueous solution. Theory and experiment

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<

“…F K (Slater-Condon) and ξ 4f (Lande parameter) are radial integrals. Thus to define energy level scheme of 4f n configuration, it is necessary to have four radial integrals F 2 , F 4 , F 6 , and ξ 4f which are evaluated by Hartree-Fock method [13,15]. Then, energy E j of the jth level is given by…”

“…From these values, the value of F 2, F 4 , F 6 , and ξ 4f are found out by using (5) and (6). The intensity of the absorption band is measured by the oscillator strength (P), which is directly proportional to the area under the absorption curve.…”

“…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).…”

The ligand mediated pseudohypersensitivity of the 3H4 → 3P2, 3H4 → 3P1, 3H4 → 3P0, and 3H4 → 1D2 transitions of praseodymium(III) complexes in solution media

“…D u e to phenomenon such a s isomerization, dissociation, association, solvolysis, etc., the solution spectra can become quite complex, which in turn causes the data to bec o m e only approximate and the reproducibility of the experiment to become questionable. A new dimension to lanthanide coordination chemistry in solution has come of a g e with the increased use of lanthanides a s probes in the exploration of the structural functions of biomolecular reactions (17)(18)(19)(20). Moreover, the use of lanthanide hypersensitive '~u t h o r to whom correspondence may be addressed.…”

An absorption spectral analysis of 4f-4f transition and symmetry study of Nd(III) with Fumaric acid and Maleic acid in the presence and absence of Ca2+and Zn2+ in aqueous and non-aqueous solvent

“…Lanthanides are mainly used in the exploration of structural function and bimolecular reaction, mechanism and diagnostic agent in medicine due to unique feature to replace Ca 2+ and having specific magnetic and spectroscopic properties [1][2][3][4][5][6][7][8] . Hard metal ion asCa different co-ordination and bonding behavior toward biological molecules.…”