Designing the thermal behaviour of aqueous biphasic systems composed of ammonium-based zwitterions

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Ferreira, AM (Author) Other; Passos, H (Author) Other; Okafuji, A (Author) Other; Freire, MG (Author) Other; Coutinho, JAP (Author) Other; Ohno, H (Author) Other

Journal

Title: Green Chemistry

Vol. 19

Pages: 4012-4016

ISSN: 1463-9262

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 22 Citations

Other information

Authenticus ID: P-00M-YSQ

DOI: 10.1039/c7gc02262j

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5