Phase behaviour of room temperature ionic liquid solutions: an unusually large co-solvent effect in (water plus ethanol)

Najdanovic-Visak, Vesna and Esperanca, JMSS and Rebelo, LPN and da Ponte, MN and Guedes, HJR and Seddon, Kenneth R. and Szydlowski, J (2002) Phase behaviour of room temperature ionic liquid solutions: an unusually large co-solvent effect in (water plus ethanol). Physical Chemistry Chemical Physics, 4 (10). pp. 1701-1703. ISSN 1463-9076

Abstract

A surprising mixed solvent effect, both in its magnitude and direction, has been found in the phase diagram of the ternary mixture of ([C4mim][PF6]+(water+ethanol)). For a molar ratio of 1∶1 of water to ethanol, the co-solvent effect in the near-critical demixing temperature can be as large as 80 K.