Calculation of electric dipole intensity parameters of 4f-4f transitions of Pr(III) and glutathione reduced (GSH) complex in presence and absence of Zn(II)

Comparative absorption and spectral analysis of 4f-4f transitions of Pr(III) and glutathione reduced (GSH) complex in presence and absence of Zn(II) is carried out in different aquated organic solvents of CH3OH, CH3CN, DMF and dioxane and their equimolar mixtures at different pH (3.0, 4.0, 5.0 and 6.0). The values of experimentally calculated oscillator strengths (P) and computed values of Judd-Ofelt electric dipole intensity parameters, Tλ (λ = 2, 4, 6) are discussed for different 4f-4f transitions in different experimental conditions. The changes in the values of oscillator strengths (P) and Tλ parameters suggest the specific correlation between relative intensities, ligand structures and nature of interaction of Pr(III) with GSH in the presence and absence of Zn(II).