Double-quantum NMR Spectroscopy of Dipolar-coupled Spins under Fast Magic-angle Spinning

In the past decade, solid-state NMR spectroscopy under fast magic-angle spinning (MAS) has developed into a versatile tool for elucidating structure and dynamics. Dipolar double-quantum (DQ), MAS spectroscopy has been applied to a variety of materials and provided unique insight, e. g., into the structure of hydrogen-bonded and supramolecular systems. This review presents the basics of solid-state homonuclear H-1-H-1 and heteronuclear H-1-C-13 DQ MAS NMR, followed by an overview of recent applications.