Conductivities of 1-alkyl-3-methylimidazolium chloride ionic liquids in monosaccharide + water solutions at 298.15 K

Conductivities of 1-alkyl-3-methylimidazolium chloride ionic liquids ([Cnmim]Cl, n = 4, 6, 8, 10) in aqueous glucose solutions and [C4mim]Cl in aqueous monosaccharide (glucose, galactose, xylose, and ribose) solutions were measured together with densities and viscosities of aqueous monosaccharide solutions at 298.15 K. The limiting molar conductivities (Λ0) and association constants (KA) were derived from the Lee–Wheaton conductivity equation. From the obtained conductivity data, the values of the Walden product (Λ0η0) were also calculated. The IL–monosaccharide interactions were discussed in terms of the alkyl chain length of the cations of the ILs and the stereo-chemistry of the monosaccharides.

► Conductivities of ionic liquid (IL) + saccharide + water systems were measured.
► Limiting molar conductivities of the ILs decrease with saccharide molalities.
► Limiting molar conductivities in hexose solutions are smaller than in pentose.
► Limiting molar conductivities depend linearly on the alkyl chain length of the ILs.