Slow molecular mobility in the amorphous solid and the metastable liquid states of three 1-alkyl-3-methylimidazolium chlorides

► Slow molecular mobility in 1-n-alkyl-3-methylimidazolium chlorides studied by TSDC ► Broad secondary relaxations arising from small amplitude oscillations of the cation's dipole ► Glass transformation with the features of a weakly fragile glass-former ► Slow relaxation close to the main relaxation but above Tg, with high polarization and moderate degree of cooperativity