Volumetric Properties of Ethylammonium Nitrate + γ-Butyrolactone Binary Systems: Solvation Phenomena from Density and Raman Spectroscopy

Intermolecular interactions, ion solvation, and association in mixtures of 1‐n‐butyl‐3‐methylimidazolium hexafluorophosphate and γ‐butyrolactone: insights from Raman spectroscopy

“…), it turns out to be monotonically blueshifting at x IL < 0.4 by ~7 cm −1 and keeping its position at higher IL concentrations. This is opposite to what was observed for solutions in γ‐BL of various lithium salts and of EtNH 3 NO 3 IL where a complex bandshape variation with an overall redshift of ~20 cm −1 was related to the strong interactions of cations with the carbonyl oxygen of γ‐BL molecules. The blueshift observed here could thus evidence that the interactions of γ‐BL with IL, in particular with its cation, are generally weaker than the intermolecular interactions in the neat molecular solvent.…”

“…As it was already mentioned above, both the literature survey [94][95][96] and the DFT calculations presented here point to the remarkable sensitivity of the C¼O stretching mode of γ-BL towards the intermolecular interactions and to the solvation in particular. Due to inherent complexity of the spectral profile [93] and the consequent need for advanced analysis, we normalized this spectral region by the fitted area of the γ-BL ring stretching band at 931 cm À1 as it was noted in section 3.1.…”

“…[93] This donating group is known to be a quite sensitive IR and Raman probe for the solvation interactions in different electrolyte solutions. [94][95][96] Taken together with the fact that there are no interfering bands due to BmimPF 6 it makes this region interesting to follow.…”

Intermolecular interactions in mixtures of 1-n-butyl-3-methylimidazolium acetate and water: Insights from IR, Raman, NMR spectroscopy and quantum chemistry calculations

“…Infrared and Raman spectroscopy [43] have been widely used to study intermolecular interactions using changes in the profile of a vibrational mode (position, width, intensity), which are sensitive to changes in the environment around the molecules. It is well known that intermolecular forces such as hydrogen bonding cause a shift in some of the vibrational modes, allowing the studies of the interactions.…”

Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids

“…In view of the results, it seems critical to control and determine the water content if an accurate characterization is to be made. For this reason, in this work we have proposed as an objective to study systematically the influence of the content of small quantities of water (from about 300 to 30,000 ppm) in EAN and PAN on the measurement of density, [15] (red squares), [23] (green dots), [24] (yellow dots), [27] (orange dots), [28] (cyan dots), [29] (red dots), [32] (pink dots), [36] (grey dots), [41] (dark green dots), [46] (brown dots), [48] (blue dots), [52] (dark red dots), [58] (purple dots), [60] (green squares), [65] (yellow squares), [67] (orange squares), [70] (cyan squares), [71] (pink squares), [75] (grey squares), [76] (dark green squares), [77] (brown squares), [81] (blue squares), [82] (dark red squares), [85] (purple squares), [86] (green rhombs), [87] (cyan rhombs) and [89] (orange rhombs).…”