Aqueous biphasic systems composed of a water-stable ionic liquid plus carbohydrates and their applications

作者：Freire Mara G^*; Louros Claudia L S; Rebelo Luis Paulo N; Coutinho Joao A P

来源：Green Chemistry, 2011, 13(6): 1536-1545.

DOI：10.1039/c1gc15110j

A water-stable ionic liquid, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, [C(4)mim][CF(3)SO(3)], is herein proposed to be used in the formation of aqueous biphasic systems (ABS) with a large range of mono-and disaccharides, as well as polyols. Binodal curves, tie-lines, and densities and viscosities of the co-existing aqueous phases, were determined for each ternary system. The proposed systems are low-viscous offering enhanced features over conventional polymer-based ABS. In addition, the partitioning of model biomolecules, such as L-tryptophan, caffeine, and beta-carotene, was further investigated to ascertain the applicability of such ABS. These systems are particularly interesting in the recovery of bioactive products from natural sources, while the availability of carbon-based sources to cells constitutes a major advantage in separations from fermentative media. Moreover, the use of carbohydrates in ionic-liquid-based ABS constitutes a step forward along the biorefinery concept envisaging sustainable conversions of biomass into a broad spectrum of bio-based products.

• 出版日期2011