Designing the thermal behaviour of aqueous biphasic systems composed of ammonium-based zwitterions
authors Ferreira, AM; Passos, H; Okafuji, A; Freire, MG; Coutinho, JAP; Ohno, H
nationality International
journal GREEN CHEMISTRY
keywords TEMPERATURE IONIC LIQUIDS; SATURATED WATER-CONTENT; METAL-OXIDES; EXTRACTION; PHASE; MIXTURES; PARTITION; PROTEINS; RECOVERY; SOLVENT
abstract The ability of water-soluble ammonium-based zwitterions (ZIs) to form aqueous biphasic systems (ABS) in the presence of aqueous solutions of salts is disclosed here. These systems are thermoreversible at temperatures close to room temperature and further allow the design of their thermal behavior, from an upper critical solution temperature (UCST) to a lower critical solution temperature (LCST), by increasing the ZI alkyl chain length. The investigated thermoreversible ABS are more versatile than typical liquidliquid systems, and can be applied in a wide range of temperatures and compositions envisaging a target separation process. An example is given regarding their ability to selectively separate mixtures of aromatic and aliphatic amino acids in a single-step.
publisher ROYAL SOC CHEMISTRY
issn 1463-9262
year published 2017
volume 19
issue 17
beginning page 4012
ending page 4016
digital object identifier (doi) 10.1039/c7gc02262j
web of science category Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
subject category Chemistry; Science & Technology - Other Topics
unique article identifier WOS:000408588100006
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  impact metrics
times cited (wos core): 0
journal impact factor (jcr 2016): 9.125
5 year journal impact factor (jcr 2016): 8.815
category normalized journal impact factor percentile (jcr 2016): 94.826
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