Probing Structures of Interfacial 1-Butyl-3-Methylimidazolium Trifluoromethanesulfonate Ionic Liquid on Nano-Aluminum Oxide Surfaces Using High-Pressure Infrared Spectroscopy

Temperature Dependence on Density, Viscosity, and Electrical Conductivity of Ionic Liquid 1-Ethyl-3-Methylimidazolium Fluoride

“…The reaction equations from [EMIm]Cl are shown in Figure 2. For the molecular structure of alkyl-substituted imidazolium-based ILs, as shown in Figure 1, R 1 is typically methyl and R 2 can generally be butyl [24][25][26][27][28][29][30][31], ethyl [32][33][34][35], or octyl [36]. [38] reported a method that included putting a strongly hydrogen bonded organic material in contact with an ionic liquid having a fluoride anion for the solubilization of the strongly hydrogen bonded organic material.…”

Optics and Spectroscopy for Fluid Characterization

“…They obtain IR spectra from aqueous salt and acid solutions and an aluminum plate to demonstrate that useful information about the molecular interactions at the metal-liquid interface can be deduced. Chang et al [18] employ a transmission infrared spectroscopy approach to study the molecular interactions between the ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate and nano-sized alumina at elevated pressures. Interestingly, in contrast to the results obtained under ambient pressure, the local structures of both counter-ions appear disturbed under high pressure.…”

Characterization of Local Structures of Confined Imidazolium Ionic Liquids in PVdF-co-HFP Matrices by High Pressure Infrared Spectroscopy

“…High-pressure infrared spectroscopy is a straightforward method to study the adjusted vibrational signals by forcing molecules to come close to each other. Modulating the molecular environments and non-covalent interactions by high pressures may provide special insights into the thermodynamically stable conformations of chemical systems [ 27 , 28 , 29 , 30 , 31 ]. This connotes that, under high-pressure conditions, the IL ions and the PVdF-co-HFP may aggregate at hydrostatic pressures.…”

“…In previous studies, IL cations have been known to form stable associations with deoxyribonucleic acid sodium salt (DNA) [ 27 ] under high pressures. Moreover, the results of previous studies imply that the IL hydrogen-bonding network or cluster structure may be disturbed on mixing additives such as porous silica [ 28 ], β-cyclodextrin [ 29 ], aluminum oxide [ 30 ], and mica [ 31 ] under high pressures.…”