Synthesis, spectroscopic characterization and apparent molar properties of ethanolammonium based ionic liquids with DMSO

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

“…As the temperature increases, the empirical parameter, S k , becomes more negative in the I-D-L system as well as in the case of the I-D-X system, which also supports the same. According to Krishna et al, the positive K s ϕ ∞ arises from the free space available between the molecules in a mixture, which leads to high solvent intrinsic compressibility, thereby making the solution more compressible in nature . The overall increase seen in the dilution values of both volume and isentropic compressibility of a ternary system is an indication of strengthening in the solute (here, lignin or xylose) and cosolute ([DBU][OTf]) interactions as explained by S. Panda et al …”