Díaz, SaraGutierrez, SebastianPérez Velilla, EduardoOlmos, RamiroCabañas Poveda, Albertina2025-01-292025-01-292025-01-27Díaz, Sara, et al. «Thermodynamic and Spectroscopic Study of Solutions of Therapeutic Deep Eutectic Solvents (THEDES) in Supercritical CO2». Journal of Molecular Liquids, enero de 2025, p. 127027. DOI.org (Crossref), https://doi.org/10.1016/j.molliq.2025.127027.10.1016/j.molliq.2025.127027https://hdl.handle.net/20.500.14352/116803The solubilities of the Deep Eutectic Solvents (DES) ibuprofen:thymol and ibuprofen:L-menthol in supercritical CO2 were determined up to 250 bar at 40, 50 and 60 °C using a variable volume view cell. The solubility of DES at different compositions was compared to that of the individual components showing little deviation from the linear trend. The vapour-phase compositions for some conditions were also determined by 1H NMR showing that the CO2 preferentially extracts the most volatile component. A FTIR spectroscopic study of the DES at room pressure and the DES dissolved in CO2 was also conducted. At room temperature, ibuprofen was present either forming a dimer or bonded to the terpene. When the DES was dissolved in CO2, significant amounts of free ibuprofen were also found. A simple association model was proposed and some thermodynamic magnitudes were determined. The spectroscopic information is consistent with the thermodynamic data.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal articlehttps://doi.org/10.1016/j.molliq.2025.127027https://www.sciencedirect.com/science/article/pii/S0167732225001862#ak005restricted access544Deep eutectic solventsSupercritical CO2MentholThymolIbuprofenSolubilityPhase diagramQuímica física (Química)23 Química