Abstract

This review presents recent developments in the application of nuclear magnetic resonance (NMR) spectroscopy for studying the structure and dynamics of ionic liquids. We in particular focus on protic ionic liquids which are characterized by strong hydrogen bonding and proton transfer. Thus, the most relevant NMR-active nucleus is the proton, which undergoes rapid exchange on the NMR time scale. Also, other nuclei are considered if they provide information beyond simple characterization of this unique liquid material. We addressed several NMR techniques which are traditionally or just recently used in the field of ionic liquids research: relaxation time experiments, pulsed-field gradient NMR, fast-field-cycling NMR, electrophoretic NMR, and solid state NMR. Also, novel experiments such as dynamic nuclear polarization NMR are discussed.

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