Solid-state NMR of quadrupolar nuclei: Selected new methods and applications

Abstract

New methods for solid-state NMR of quadrupolar nuclei are surveyed. The focus is largely on new or improved pulse sequences, and covers the past few years of literature up to early 2022. These include advances related to improved sensitivity and excitation for wideline patterns acquired under stationary conditions; understanding relaxation; improved multiple-quantum magic-angle spinning and satellite-transition magic-angle spinning methods; advances in indirect detection; and advances in multidimensional correlation spectroscopy. Applications to quadrupolar nuclei made possible by the use of ultrahigh applied magnetic fields, such as the ~ 36 T field (1.5 GHz 1 H frequency) of the series-connected hybrid magnet at Tallahassee's National High Magnetic Field Laboratory, are also highlighted. Selected further applications to energy materials are presented.