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
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 liquid–liquid 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.
year published 2017
volume 19
issue 17
beginning page 4012
ending page 4016
digital object identifier (doi) 10.1039/C7GC02262J
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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