Molecular Interaction of Dextran with Urea Through Ultrasonic Technique

The study of molecular interaction using ultrasonic technique in aqueous dextran solution having concentrations range (0.10%, 0.25%, 0.50%, and 0.75% and 1%) with 6(M)urea has been carried out at four different frequencies 1MHz, 5MHz, 9MHz, 12MHz and a fixed temperature 308 K. The thermo-acoustic parameters such as Acoustic impedance (Z), Adiabatic compressibility (β), Intermolecular free length (Lf), Relaxation time (τ) and Gibb's free energy (δG) are evaluated from the deliberate estimations of Ultrasonic Velocity speed (U), Density (ρ) and Viscosity (η). The molecular interaction present in the liquid solution such as dipole-dipole association, hydrogen- bonding, acceptor-donor, and electrostriction is analyzed based on these parameters. These acoustic parameters are utilized to get to and clarify the nature and quality of the molecular interaction of dextran with urea.