Abstract
The phase behavior of binary liquid mixtures of the ionic liquids (ILs) 1,3-dimethylimidazolium bis((trifluoromethyl) sulfonyl) amide (C1mimNTf2) and 1-methyl-3- propyl imidazolium bis ((trifluoromethyl) sulfonyl) amide (C3mimNTf2) with n-alkyl alcohols (CnOH; 3 ≤ n ≤ 8) was investigated. The phase diagrams are obtained by applying the cloud-point method on a set of synthetically prepared samples. Partial miscibility with an upper critical solution temperature (UCST) was observed. The study focuses on the determination of the liquid–liquid phase behavior in a temperature range of (267–423) K at atmospheric pressure. UCSTs were observed in between 280 K and 415 K. The results are complementing prior measurements on similar IL-CnOH systems concerning ILs with longer side chain. A numerical analysis of the phase diagrams on the basis of Ising criticality was applied presuming the validity of the rectilinear diameter or a nonlinear diameter as requested by the theory of complete scaling. The results (UCST, cr...
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