Specific interactions between the quaternary ammonium oligoether-based ionic liquid and water as a function of pressure
Abstract
The interactions between Ammoeng 100 and O stretching vibration under the pressures below 1 GPa in comparison to the absorption frequencies of pure Ammoeng 100. This observation is likely related to local structures of the S
O groups interacting with D2O molecules. DFT-calculations indicate that the most energetically favored conformation of ion pairs should be the species having only one hydrophilic hydrogen bonding. The results of calculations reveal that water addition may induce the partial replacement of C–H⋯O interactions with strong hydrogen bonding between anions and