Vapor Pressures of the 1-Butyl-3-methylimidazolium Bromide + Water, 1-Butyl-3-methylimidazolium Tetrafluoroborate + Water, and 1-(2-Hydroxyethyl)-3-methylimidazolium Tetrafluoroborate + Water Systems

Abstract

This work presents the vapor pressures of the following binary imidazolium-based ionic liquid (IL) + water solutions: 1-butyl-3-methylimidazolium bromide ([bmim][Br]) + water, 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF 4 ]) + water, and 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate ([hydemim][BF 4 ]) + water. Vapor pressures were measured by using the boiling-point method in the temperature range of (304.8 to 475.2) K and in the concentration range of (20.0 to 80.0) mol % of ILs and were correlated with an Antoine-type equation. The resulting average absolute deviations (AAD) between the experimental and calculated values were found to be (0.419, 1.16, and 0.682) % for the [bmim][Br] + water, [bmim][BF 4 ] + water, and [hydemim][BF 4 ] + water solutions, respectively.

Effect of temperature on mixing thermodynamics of a new ionic liquid: {2-Hydroxy ethylammonium formate (2-HEAF)+short hydroxylic solvents}

“…The volumetric and ultrasonic properties of solutions have proved particularly informative in elucidating the variety of solute/solvent interactions into liquid media and they are of main interest for direct industrial applications. In this respect, different works have been published related to phase behaviour or volumetric properties of some ionic liquids (imidazolium or pyridinium cations-based ionic liquids are the most frequently presented) in different solvents in a few years [19][20][21][22][23][24][25][26][27][28]. Although different paths of synthesizing this new class of liquids are described in the literature, along with well documentation of a better understanding, there continues to be difficulty in preparing them with sufficient purity at modest costs for the practical applications.…”

SEM Observation of Wet Biological Specimens Pretreated with Room‐Temperature Ionic Liquid

“…[23] It is known that such aqueous solutions of RTILs are relatively stable under vacuum. [24] The morphology preservation of wet biological specimens under vacuum may be caused by an anomalous physical property of the RTIL aqueous solution. However, the SEM image of the sample pretreated with the new method (Scheme 2) gradually deteriorated over time, especially of L929 cells, if the observation time exceeded 60 min.…”

Observation of Electrochemical Reaction and Biological Specimen by Novel Analytical Technique Combined with Room-Temperature Ionic Liquid and Scanning Electron Microscope

“…27 Although we cannot comment whether water in biological specimens shown in this article was completely replaced with RTIL at this stage, we suppose that RTIL is introduced to the specimens in varying degrees and it exists as a RTIL aqueous solution in the specimens. Because such RTIL aqueous solution is relatively-stable under vacuum condition, 29 the morphology preservation of wet biological specimens under vacuum condition may be caused by anomalous physical property of the RTIL aqueous solution.…”