Determination, characterization and modeling of aqueous biphasic systems composed of propylammonium-based ionic liquids and phosphate salts

authors	Mussagy, CU; Tabanez, NL; Farias, FO; Kurnia, KA; Mafra, MR; Pereira, JFB
nationality	International
journal	CHEMICAL PHYSICS LETTERS
author keywords	Aqueous biphasic systems; Ionic liquids; Liquid-liquid extraction; Phase diagrams; COSMO-RS; NRTL
keywords	2-PHASE SYSTEMS; PHASE-DIAGRAMS; POLYETHYLENE-GLYCOL; PROTEIN SEPARATION; EXTRACTION; CAROTENOIDS; PARTITION; SOLVENTS; RECOVERY; ABILITY
abstract	Ionic liquids (ILs)-based aqueous biphasic systems (ABS) are efficient platforms for the extraction and purification of biomolecules. To find more biocompatible ABS, propylammonium-based ILs, phosphate salts and water were mixed at three temperatures, evaluating the influence of IL and temperature on the liquid-liquid equilibria (LLE). The biphasic region increases with the increase of IL' anionic/cationic chain and decreases with the increase of temperature. There is good agreement between the IL' ability to form ABS and the hydrogen bonding interaction predicted by COSMO-RS. The subtle balance of hydrogen bonding between salt anion-water and IL anion-water governs the phase separation.
publisher	ELSEVIER
issn	0009-2614
isbn	1873-4448
year published	2020
volume	754
digital object identifier (doi)	10.1016/j.cplett.2020.137623
web of science category	Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category	Chemistry; Physics
unique article identifier	WOS:000560722800014