Synthesis and Physical Properties of 1-Ethylpyridinium Ethylsulfate and its Binary Mixtures with Ethanol and 1-Propanol at Several Temperatures

Ionic liquid 1-ethyl pyridinium ethylsulfate, EpyESO(4), was synthesized, and its experimental densities, speeds of sound, viscosities, and refractive indices from (298.15 to 343.15) K are reported. Densities, speeds of sound, isentropic compressibility, and dynamic viscosities for EpyESO(4) + ethanol and + I-propanol at temperatures T = (298.15, 313.15, and 328.15) K were determined over the whole composition range at 0.1 MPa. The excess molar volumes, isentropic compressibilities, and viscosity deviations for ethanol (1) + EpyESO(4) (2) and 1-propanol (1) + EpyESO(4) (2) binary systems at the above-mentioned temperatures were calculated and satisfactorily fitted to the Redlich-Kister equation. Refractive indices of the binary mixtures were measured at 298.1.5 K over the whole composition range. The results were used to calculate deviations in the refractive index.