Thermodynamics and Activity Coefficients at Infinite Dilution for Organic Solutes in Trialkyl-Substituted Imidazolium-Based Ionic Liquid 1-Propyl-2,3-dimethylimidazolium Thiocyanate

Infinite Dilution Activity Coefficients and Gas–Liquid Partition Coefficients of Organic Compounds in Ionic Liquid 1-Butyl-2,3-dimethylimidazolium Thiocyanate: Measurements and LFER Calculations

“…In trialkyl-substituted imidazolium-based ILs with another methyl group on the 1,3-alkyl-substituted imidazole ring, not an acidic proton at the 2-position, the aromaticity of the ILs may change and different characteristics may emerge compared to the 1,3-substituted imidazolyl ILs, for example, the selectivity or the extractive capacity in the separation process may improve. − It is useful to measure the γ i ∞ data of various solutes in trialkyl-substituted imidazolyl ILs because the data are relatively few. Our group measured the thermodynamic properties of some ILs with trialkyl-substituted imidazolium rings. − ILs containing the imidazolium cation and thiocyanate anion [SCN – ] are attracting considerable attention for industrial applications due to low viscosity, low melting point, and good conductivity, especially the low values of viscosity . In comparison to the ILs containing fluorinated anions, which may cause environmental problems due to degradation and release of HF, the SCN-based ILs are considered for being really “green solvents”, which have been used in different areas such as CO 2 capture, design and optimization of the membrane technology, and inhibition of corrosion, and are considered a potentially effective extractant for the separation of aliphatic from aromatic hydrocarbons or in the desulfurization of model fuels. − We have measured the γ i ∞ of 32 solutes in the IL 1-propyl-2,3-dimethylimidazolium thiocyanate ([PMMIM]­[SCN]) .…”

“…Our group measured the thermodynamic properties of some ILs with trialkyl-substituted imidazolium rings. − ILs containing the imidazolium cation and thiocyanate anion [SCN – ] are attracting considerable attention for industrial applications due to low viscosity, low melting point, and good conductivity, especially the low values of viscosity . In comparison to the ILs containing fluorinated anions, which may cause environmental problems due to degradation and release of HF, the SCN-based ILs are considered for being really “green solvents”, which have been used in different areas such as CO 2 capture, design and optimization of the membrane technology, and inhibition of corrosion, and are considered a potentially effective extractant for the separation of aliphatic from aromatic hydrocarbons or in the desulfurization of model fuels. − We have measured the γ i ∞ of 32 solutes in the IL 1-propyl-2,3-dimethylimidazolium thiocyanate ([PMMIM]­[SCN]) . As far as we know, few data are available on 1-butyl-2,3-dimethylimidazolium thiocyanate ([BMMIM]­[SCN]).…”

“…24−26 We have measured the γ i ∞ of 32 solutes in the IL 1-propyl-2,3-dimethylimidazolium thiocyanate ([PMMIM][SCN]). 16 As far as we know, few data are available on 1-butyl-2,3-dimethylimidazolium thiocyanate ([BMMIM] [SCN]). This work is a continuation of our studies on the determination of γ i ∞ for organic solutes (i) in trialkyl-substituted imidazolium-based ILs.…”