Mixing thermodynamic properties of 1-butyl-4-methylpyridinium tetrafluoroborate [b4mpy][BF4] with water and with an alkan-1ol (methanol to pentanol)

Thermodynamic study of binary mixtures containing 1-butylpyridinium tetrafluoroborate and methanol, or ethanol

“…Moreover, the formation of interactions between the hydroxyl group in the alcohol and the tetrafluoroborate anion as well as the new dipole-dipole interactions between both components, are also important. Some studies revealed that interactions between the alcohol and the pyridinium cation are less important than those with the anions [11,36]. Consequently, the resultant behaviour reflected in the excess properties is attributed to the multiple factors that take place in the mixture.…”

“…For example, excess properties have been measured such as excess volume or enthalpy, and deviations in viscosity for binary mixtures of (1-butyl-nmethylpyridinium tetrafluoroborate with n = 2, 3, or 4 + methanol, or ethanol) [10,11,[36][37][38]. In this case, it is possible to study the effect of introducing a methyl group in the pyridinium cation on mixture properties.…”

Heat capacities and excess enthalpies of the (N-hexylisoquinolinium thiocyanate ionic liquid + water) binary systems

“…Besides heat capacity, excess enthalpy (H E Þ is also a very important property from this point of view. Thus far, several groups reported experimental H E data for (IL + water) binary mixtures [12][13][14][15][16]36,[39][40][41][42][43][44][45][46][47]. For instance, Ficke et al reported H E for the mixture of 1-ethyl-3-methyimidazolium thiocyanate with water [14].…”

Physical Properties of Binary Mixtures of ILs with Water and Ethanol. A Review.

“…In Figures 5 to 9 we present the density data for the published IL + ethanol systems also at 298.15 K. Thus in Figure 5 we present systems with ILs containing the BF 4 anion, four alkyl imidazoliums ) and one pyridinium (Ortega et al, 2008). Curves are similar that those with water, but the density value decreasing is more progressive than corresponding systems with water.…”

“…The source of each set of data is included in the corresponding figure. Thus, in Figure 1 we plot density vs. IL molar fraction for aqueous mixtures of five imidazolium Malhan et al, 2007;Ge et al, 2009) and the only two pyridinium based ILs (Ortega et al, 2008;Mokhatarani et al, 2009b), all of them with BF 4 as common anion. Other authors also measured some of those systems, but results are very similar (Zhou et al, 2006;Zhang et al, 2006;Wu et al, 2009).…”