Enhanced separation performance of aqueous biphasic systems formed by carbohydrates and tetraalkylphosphonium- or tetraalkylammonium-based ionic liquids


Aiming at designing effective and sustainable separation processes, herein we propose the use of carbohydrates combined with tetraalkylphosphonium- or tetraalkylammonium-based ionic liquids (ILs) to form aqueous biphasic systems (ABS). The formation of ABS composed of non-aromatic and non-fluorinated ILs with carbohydrates is shown here for the first time. These novel systems are competitive extraction platforms when compared against more conventional ABS formed by ILs and salts or fluorinated ILs and carbohydrates. Finally, it is shown that these systems can be efficiently recovered and reused, without losses in their separation performance.



subject category

Chemistry; Science & Technology - Other Topics


Quental, MV; Pereira, MM; Ferreira, AM; Pedro, SN; Shahriari, S; Mohamadou, A; Coutinho, JAP; Freire, MG

our authors


This work was developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by national funds through the FCT/MEC and co-financed by the FEDER under the PT2020 Partnership Agreement. MVQ and AMF acknowledge the FCT for the PhD grant SFRH/BD/109765/2015 and SFRH/BD/92200/2013, respectively. M. M. Pereira acknowledges the PhD grant (2740-13-3) and financial support from the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Capes. The authors acknowledge the financial support from the European Union Framework Programme for Research and Innovation HORIZON 2020, under the TEAMING Grant Agreement No 739572 - The Discoveries CTR. The research leading to the reported results has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC grant agreement no. 337753.

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