4 documents found, page 1 of 1
Characterization of systems of thiophene and benzene with ionic liquids
Batista, Marta L. S.; Tome, Luciana I. N.; Neves, Catarina M. S. S.; Gomes, Jose R. B.; Coutinho, Joao A. P.The potential of ionic liquids for aromatic-aliphatic separation or removal of sulfur-containing compounds such as thiophene is well established but, in spite of a number of phase diagrams reported in the literature, the values of other properties required for process design, such as viscosities and densities, are poorly characterized for these mixtures. In this work, systems presenting a LLE with a LCST are st...
\"Washing-out\" ionic liquids from polyethylene glycol to form aqueous biphasic...
Tome, Luciana I. N.; Pereira, Jorge F. B.; Rogers, Robin D.; Freire, Mara G.; Gomes, Jose R. B.; Coutinho, Joao A. P.The molecular-level mechanisms behind the formation of aqueous biphasic systems (ABS) composed of ionic liquids (ILs) and polymers are hitherto not completely understood. For the first time, it is herein shown that polymer-IL-based ABS are a result of a ``washing-out'' phenomenon, and not of a salting-out effect of the IL over the polymer as assumed in the past few years. Novel evidence is herein provided by ex...
Evidence for the Interactions Occurring Between Ionic Liquids and Tetraethylene...
Tome, Luciana I. N.; Pereira, Jorge F. B.; Rogers, Robin D.; Freire, Mara G.; Gomes, Jose R. B.; Coutinho, Joao A. P.The well-recognized advantageous properties of poly(ethylene glycol)s (PEGs) and ionic liquids (ILs) in the context of an increasing demand for safe and efficient biotechnological processes has led to a growing interest in the study of their combinations for a wide range of procedures within the framework of green chemistry. Recently, one of the most promising and attractive applications has been the novel IL/p...
Salting-in with a Salting-out Agent: Explaining the Cation Specific Effects on ...
Tome, Luciana I. N.; Pinho, Simao P.; Jorge, Miguel; Gomes, Jose R. B.; Coutinho, Joao A. P.Although the understanding of ion specific effects on the aqueous solubilities of biomolecules is crucial for the development of many areas of biochemistry and life sciences, a consensual and well-supported molecular picture of the phenomena has not yet been established. Mostly, the influence of cations and the nature of the molecular interactions responsible for the reversal of the Hofmeister trend in aqueous ...