Effect of temperature and solvents on speed of ultrasound and allied acoustical parameters of epoxy ricinol of 9,9'-bis(4-hydroxyphenyl)anthrone-10 solutions

Department of Chemistry, Saurashtra University, Rajkot-360 005, Gujarat, India
E-mail : phparsania@aol.com, phparsania22@gmail.com
Manuscript received 06 April 2010, accepted 07 July 2010
Density (p), viscosity (ŋ) and speed of ultrasound (U) (2 MHz) of pure solvents (chloroform, THF and 1.4-dioxane) and solutions of epoxy ricinol of 9,9'-bis(4-hydroxyphenyl)anthrone-10 (EANRA) solutions have been investigated at 303, 308 and 313 K. Specific acoustical impedance (Z), isentropic compressibility (k,), intermolecular free path length (L_r), classical absorption coefficient (a/f²)_cl and viscous relaxation time (τ) have been determined from p,ƞ and U data and arc correlated with concentration. Z, (a/f²)el and τ increased with C and decreased with T, while k, and L_r decreased with C and increased with T in the solvent systems studied. A fairly good to excellent correlation between a given parameter and concentration is observed at 303, 308 and 313 K and solvent systems studied. Linear increase or decrease of acoustical parameters with concentration and temperature indicated existence of strong molecular interactions. EANRA has structure forming tendency.