Ionic binary mixtures involving

Conductance and Ionic Association of Several Electrolytes in Binary Mixtures Involving Sulfolane (TMS) and Protic Solvents... 

The preferential solvation model allowed us to explain the positive and negative deviations from ideal behaviour and the synergetic effect exhibited for the solvato-chromic properties with the predominance of a species in the solvation sphere of the indicators. In the solvent systems comprised of [BF ]/[PF ] anions, the probes are preferentially solvated by the mixed solvent, while in the systems with [Cl]/ [Br] anions, the IL controls the solvation behaviour. These results are indicative of the involvement of ion-pair character of the IL. Additionally, it was possible to select binary mixtures with particular solvating properties varying not only in the solvent compositions but also the nature of the ionic or the molecular component of the mixture. 

Solubilities of ammonia in ionic liquids, l-ethyl-3-methylimidazolium acetate ([EMIm]Ac), l-ethyl-3-methylimidazolium thiocyanate ([EMIm]SCN), l-ethyl-3-methylimidazolium ethylsulfate ([EMImJEtOSOs), and N,N-dimethy- lethanolammonium acetate ([DMEA]Ac) were measured for the first time by A.Yokozeki and M.B. Shiflett [7] in 2007. Six mixture compositions of each binary system were involved from about 30 to 85 mole% of ammonia. Pressure-temperature-composition (P-T-x) data were claimed at isothermal conditions of 283, 298, 323, 348, and 373 K. The observed solubility of ammonia in ionic liquids is very high, and all cases show negative deviations from ideal solution behavior. Experimental P-T-x data were successfully correlated with the equation-of-state (EOS) model [8]. The experimental data and fitting results are shown in Figure 5 8. The opportunity for the absorption cycle application using the ammonia-RTIL system, replacing the traditional ammonia-water system, has been discussed [7]. 

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