Acoustic properties of binary mixtures of 3-acetyl-4-methyl-6-chloro-8-nitrocoumarin with 1-propanol and 2-propanol at 300, 303, and 307 K

Abstract

The present work deals with the study of acoustic parameters i.e. ultrasonic velocity, density, adiabatic compressibility (β s), apparent molar compressibility (ϕk) and specific acoustic impedance (Z) which reflects structural interaction by interferometer by 3-acetyl-4-methyl-6-chloro-8-nitrocoumarin at different percentage of 1-propanol-water and 2-propanol-water solvent system at 300K, 303K and 307K are studied. In present investigation, ultrasonic velocity and density of 3-acetyl-4-methyl-6-chloro-8-nitrocoumarin have been studied at 0.01 M concentration at different concentrations (70%, 75%, 80%, 85% and 90%) in 100% 1-propanol and 2-propanol at 300K, 303K and 307K. From these values, adiabatic compressibility (β s), apparent molar compressibility (ϕk) and specific acoustic impedance (Z) are calculated. Measurement of ultrasonic velocity is the best tool to investigate solute-solvent, solute-solute and ion-solvent interactions. Therefore, in last four decades ultrasonic interferometric study created its own identity for determining solute-solvent interactions. By this study, adiabatic compressibility (β s), apparent molar compressibility (ϕk) and specific acoustic impedance (Z) acoustic properties are determined which explain how these interactions occur and responsible for breaking and making of the structure in the solution. So in the present work these acoustic parameters were studied for synthesized ligands, which are used as solutes. Trends of acoustic properties indicate the presence of molecular interaction in the present binary mixture under study. It may be qualitatively inferred that the interaction between unlike molecules is mainly due to hydrogen bonding. The present studies investigated that with increasing the concentration of 1-propanol and 2-propanol β s and ϕk increases while Z decreases at 300 k, 303K and 307K by taking constant concentration of 3-acetyl-4-methyl-6-chloro-8-nitrocoumarin (0.01M). Better values of parameters are found for the 2-propanol and water system in 90% ratio at 307K. From this study it is clear that properties, which are directly or indirectly responsible for this are protic nature of solvent, dielectric constant, polarity, density, tendency of forming hydrogen bonding, surface tension, viscosity of solvent etc.