TY - JOUR
T1 - Interactions between water and 1-butyl-1-methylpyrrolidinium ionic liquids
AU - Fadeeva, Tatiana A.
AU - Husson, Pascale
AU - Devine, Jessalyn A.
AU - Costa Gomes, Margarida F.
AU - Greenbaum, Steven G.
AU - Castner, Edward W.
N1 - Publisher Copyright:
© 2015 AIP Publishing LLC.
PY - 2015/8/14
Y1 - 2015/8/14
N2 - We report experimental results on the diffusivity of water in two ionic liquids obtained using the pulsed-gradient spin-echo NMR method. Both ionic liquids have the same cation, 1-butyl-1-methylpyrrolidinium, but different trifluoromethyl-containing anions. One has a strongly hydrophobic anion, bis(trifluoromethylsulfonyl)amide, while the second has a hydrophilic anion, trifluoromethylsulfonate. Transport of water in these ionic liquids is much faster than would be predicted from hydrodynamic laws, indicating that the neutral water molecules experience a very different friction than the anions and cations at the molecular level. Temperature-dependent viscosities, conductivities, and densities are reported as a function of water concentration to further analyze the properties of the ionic liquid-water mixtures. These results on the properties of water in ionic liquids should be of interest to researchers in diverse areas ranging from separations, solubilizing biomass and energy technologies.
AB - We report experimental results on the diffusivity of water in two ionic liquids obtained using the pulsed-gradient spin-echo NMR method. Both ionic liquids have the same cation, 1-butyl-1-methylpyrrolidinium, but different trifluoromethyl-containing anions. One has a strongly hydrophobic anion, bis(trifluoromethylsulfonyl)amide, while the second has a hydrophilic anion, trifluoromethylsulfonate. Transport of water in these ionic liquids is much faster than would be predicted from hydrodynamic laws, indicating that the neutral water molecules experience a very different friction than the anions and cations at the molecular level. Temperature-dependent viscosities, conductivities, and densities are reported as a function of water concentration to further analyze the properties of the ionic liquid-water mixtures. These results on the properties of water in ionic liquids should be of interest to researchers in diverse areas ranging from separations, solubilizing biomass and energy technologies.
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U2 - 10.1063/1.4928065
DO - 10.1063/1.4928065
M3 - Article
C2 - 26277141
AN - SCOPUS:84939153455
SN - 0021-9606
VL - 143
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 6
M1 - 064503
ER -