Effect of alkyl chain length and temperature on the thermodynamic properties of ionic liquids 1-alkyl-3-methylimidazolium bromide in aqueous and non-aqueous solutions at different temperatures

Volumetric and Isentropic Compressibility Behavior of Ionic Liquid, 1-Propyl-3-Methylimidazolium Bromide in Acetonitrile, Dimethylformamide, and Dimethylsulfoxide at T = (288.15 to 308.15) K

“…Table 2 also shows that the speed of sound of investigated systems increases with decreases in temperature and solvent composition. The density and speed of sound of methanolic solutions of [C 3 mim][Br] have similar behaviors as those observed in this study [31]. Although the density of aqueous solutions of [C 3 Table 2 continued increases and the positive initial slope of φ V against the IL concentration is attributed to these interactions.…”

“…The φ 0 V values reported in this study and also in Ref. [31] show that the magnitudes of Values of the excess molar volume (V E ) were calculated using the relation,…”

“…Figure 4 shows the concentration and temperature dependences of V E for [C 3 and also for methanolic solutions studied in our previous study [31]. It was found that [31] Fig.…”

“…Figure 4 shows the concentration and temperature dependences of V E for [C 3 and also for methanolic solutions studied in our previous study [31]. It was found that [31] Fig. 5, although the molar volume of DMSO is slightly smaller than for DMF (therefore, in the DMSO solutions there are stronger packing effects than in the DMF solutions), the V E values for DMF mixtures are more negative than for DMSO mixtures.…”

“…The volumetric and acoustic properties of electrolytic and nonelectrolytic solutions have proved particularly informative in elucidating the solute-solute and solute-solvent interactions. In spite of their importance, there is limited information on the thermodynamic properties of 1-alkyl-3-methylimidazolium bromide in aqueous or nonaqueous solutions [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. As a continuation of our previous study [31] on the thermodynamic properties of the 1-alkyl-3-methylimidazolium bromide solutions, we report here new density and speed-of-sound measurements on mixtures of 1-propyl-3-methylimidazolium bromide ([C 3 mim][Br]) with acetonitrile (MeCN), dimethylformamide (DMF), and dimethylsulfoxide (DMSO) over the range of temperature from 288.15 K to 308.15 K at 5 K intervals in the dilute concentration region.…”