| Abstract |
The slow molecular mobility in three ionic liquids, 1-alkyl-3-methylimidazolium chlorides with alkyl tails C-4, C-6 and C-8, has been investigated by thermally stimulated depolarization currents (TSDC) and differential scanning calorimetry (DSC), in a temperature interval including the amorphous solid and the supercooled liquid state. A specific feature of these ionic liquids, compared with typical molecular liquids, is the existence of a slow relaxation close to the main relaxation but above T-g, which is cooperative and shows a high dielectric strength. (C) 2012 Elsevier B.A. All rights reserved. |
