Analysis of Aqueous Dextran: An Ultrasonic Studies

Abstract

Ultrasonic research can be used to recognise molecular connections and structural behaviour of molecules. The combination of ultrasonic velocity, density, and viscosity data provides a plethora of information on ion interactions, dipoles, hydrogen bonding, multi-polar, and dispersive forces. To find out the molecular interaction of solute dextran of different concentration with distilled water as a solvent. The “ultrasonic speed (U), density (ρ), and viscosity (η)” at 323 K have been determined at four different frequencies, i.e.“1MHz,5MHz,9MHz and 12 MHz”. The derived acoustical parameters such as “acoustic impedance (Z), adiabatic compressibility (β), intermolecular free length (Lf), relaxation time (τ), Gibb’s free energy (ΔG)” have been determined from the experimental data. The significance gives subjective data with respect to nature and quality of the particles interactions between solute and solvent in the liquids solutions. To measure the density by specific gravity bottle, viscosity by Ostwald’s viscometer and ultrasonic velocity through ultrasonic interferometer of the solution and to calculate the thermo acoustical parameters using the measured parameters. Ultrasonic wave propagation affects the physical properties of the medium and hence furnishes information on the physics of liquid and solution. The measured parameters like ultrasonic velocity, density, and viscosity have been used to understand the solute-solute and solute-solvent interactions in the solution containing dextran with water. The effect of frequency on thermo acoustical parameters has been studied. From the above studies, the nature of forces between molecules such as hydrogen bonds, charge transfer complexes, breaking of hydrogen bonds and complexes has been interpreted.