Volumetric properties of ionic liquid 1,3-dimethylimidazolium methyl sulfate + molecular solvents at T = (298.15–328.15) K

The experimental density, d, values as function of ionic liquid concentration, m, for binary mixtures, [MMIm]MSO4 + methanol, + water, + DMSO, + DMF, and + MeCN at T = (298.15–328.15) K are reported. Apparent molar volumes Vϕ have been determined from the experimental densities and fitted to a Redlich–Mayer equation for the calculation of limiting apparent molar volume values Vϕ0. The values of Vϕ0 have the following order in the investigated systems: MeCN < MeOH < DMF < DMSO < H2O. The calculated Vϕ0 values indicate that ionic liquid + molecular solvent interactions in water and DMSO are stronger than the other solvents. The limiting apparent molar expansibilities Eϕ0 show that at each temperature Eϕ0 values for ionic liquid in H2O and DMSO have positive values and decrease with rising temperature. The calculated values of (∂2Vϕ0/∂T2)P for binary mixtures of containing [MMIm]MSO4 have small and negative values for studied systems. Therefore, ionic liquid under study is predominantly a structure breaker.