Pressure effect on vibrational frequency and dephasing of 1-alkyl-3-methylimidazolium hexafluorophosphate ionic liquids - Pison, L; Costa Gomes, M. F; Pádua, A. A. H; Andrault, D; Norman, S; Hardacre, C; Ribeiro, Mauro Carlos Costa (Journal of Chemical Physics, 2013)