Comparative 4f–4f absorption spectral study for the interactions of Nd(III) with some amino acids: Preliminary thermodynamics and kinetic studies of interaction of Nd(III):glycine with Ca(II)

Diglycolamic acid for the mutual separation of lanthanides and actinides from dilute nitric acid solution: solvent extraction, dynamic light scattering, and spectroscopic investigations

“…The speciation of trivalent f-ions in an organic phase is essential for understanding the metal–ligand coordination chemistry in the organic phase and the driving force responsible for the extraction of metal ions. Considering the highly sensitive spectral characteristics of Nd( iii ) with respect to its coordination environment, 40–52 the Nd( iii ) ion has been chosen as the representative for the trivalent f-ions in the present study. The visible absorption spectra of Nd( iii ) recorded in nitric acid medium as well as in Nd( iii )-loaded organic phase, and the results are shown in Fig.…”

“…A typical Nd( iii ) absorption spectrum comprises several absorption bands in the wavelength region of 500–900 nm due to 4f-4f electronic transitions. 40–52 These electronic transitions occur from the ground state Russell–Saunders energy term 4 I 9/2 to the excited states such as, (A) 4 G 9/2 (500–520 nm), (B) 4 G 7/2 , 2 K 13/2 (520–540 nm), (C) 4 G 5/2 , 2 G 7/2 (560–610 nm), (D) 2 H 11/2 (615–635 nm), (E) 4 F 9/2 (660–690 nm), (F) 4 F 7/2 , 4 S 3/2 (720–770 nm), (G) 2 H 9/2 , 4 F 5/2 (770–835 nm), and (H) 4 F 3/2 (850–880 nm). These electronic transitions are clearly depicted with the corresponding absorption bands appearing in the Nd( iii ) visible spectra shown in Fig.…”

4f–4f Spectral Analysis and Solvent Effect for the Interaction of Pr(III) with l-Tryptophan Using Different Aquated Solvents in the Presence and Absence of Zn(II)

“…It is also seen that the Nephelauxetic ratio values in all the systems are found less than unity and all values of bonding parameters are found positive. These results indicate the formation of covalent bond [23]. Table 2 shows the values of calculated and observed energies for the four transitions of Pr(III) as well as root mean square deviation (RMS).…”

A Probe into the Kinetics of the Interaction of Pr(III) Ions with Some Selected Amino Acids: A 4f-4f Transition Spectral Study

“…Ltd., Mumbai, are used for the present analysis. Solvent used is Dimethylformamide(DMF) since it showed maximum intensification among other organic solvents analysed [6][7].…”

“…In the previous work [6][7], the absorption difference and comparative absorption spectroscopy involving 4f-4f transitions of the heterobimetallic complexation of some selected amino acids with Pr(III) and Ca(II) was carried out in aqueous and different aquated organic solvents. The difference in the energy parameters like Slator Condon (F K ), and Lande Spin-orbit Coupling (ξ 4f ), Nephelauxetic ratio (β), bonding parameter (b 1/2 ) and percent covalency (δ) are calculated to explain the nature of complexation.…”