Effect of anion variation on the thermophysical properties of triethylammonium based protic ionic liquids with polar solvent

摘要: Abstract In this work, we explore the anion effect on thermophysical properties of protic ionic liquids (PILs) such as triethylammonium acetate [Et3NH][CH3COO] (TEAA), dihydrogen phosphate [Et3NH][H2PO4] (TEAP) and hydrogen sulfate [Et3NH][HSO4] (TEAS) with polar solvent dimethylsulfoxide (DMSO). To understand molecular interactions between DMSO ILs, densities (ρ), ultrasonic sound velocities (u) viscosities (η) have been measured over whole range compositions at three temperatures, 298.15, 303.15, 308.15 K under atmospheric pressure. A second order empirical polynomial Arrhenius equations were used to correlate ρ η function temperature, respectively. Sound velocity mixing rules experimental values. Further, excess molar volume (VE), deviation in isentropic compressibility (Δκs) viscosity (Δη) calculated using these properties. The obtained VE, Δκs Δη values correlated by Redlich–Kister equation.