Abstract
Apparent molar properties (Vϕ, Kϕ,s), limiting apparent molar properties (Vϕo, Kϕ,so), transfer properties (ΔtrVϕo, ΔtrKϕ,so, ΔtrB), hydration number (nH) and relative viscosities (ηr) have been determined from density, speed of sound and viscosity measurements for nucleosides (uridine and cytidine) in water and in aqueous solutions of (0.1043, 0.2104 and 0.3016) mol kg−1 L-ascorbic acid at five different temperatures ranging (293.15–313.15) K by using DSA (density and speed of sound analyzer) connected with rolling ball viscometer. Viscosities of the prepared solutions have been examined to determine the Falkenhagen coefficient A, viscosity B-coefficients and its transfer parameter by using the Jones-Dole equation. The solvation behavior of nucleosides has also been computed. Based on the co-sphere overlap model, variety of intermolecular interactions predominating in the ternary solutions has been explained. By using Hepler's constant and temperature derivative of B-coefficients (dB/dT) the structure making/breaking nature of solute have been examined. Furthermore, the absorption spectra for both the nucleosides (uridine and cytidine) have been recorded in water as well as in L-ascorbic acid with the help of UV–visible spectrophotometer to investigate the interactions prevailing among these systems.
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