An Absorption Spectral Analysis of the Complexation of Nd(III) with Adenosine in Presence and Absence of Zn(II) in Aqueous and Aquated Organic Solvents

Abstract

Studies on the difference in energy parameters and comparative absorption spectrophotometry involving 4f-4f transitions on Nd(III) and adenosine in presence and absence of Zn(II) have been carried out in aqueous and aquated organic solvents (50:50) like CH₃OH, dioxane, CH₃CN and DMF. Variations in the spectral energy parameters Slater-Condon (F_K) factor, Lande spin-orbit coupling constant (ξ_4f), nephelauxetic ratio (β), bonding parameter (b^½) and per cent covalency (δ) - are calculated and correlated with binding of Nd(III) with adenosine in presence and absence of Zn(II).