Multiple spin probe NMR studies of ionic structure in 1-methyl-3-ethylimidazolium chloride-AlCl3 molten salts

Abstract The microdynamics of a room temperature molten salt system consisting of 1-methyl-3-ethylimidazolium chloride (MEICI), AlCl 3 and NaCl is investigated by 13 C, 23 Na and 27 Al NMR relaxation methods and viscosity measurements. This study supports the existence of a complex containing MEI + , AlCl 4 − and Na + . The dual spin probe (DSP) method is extended to 23 Na, which has a liquid state quadrupole coupling constant of 1.0 MHz in this complex.