1H homonuclear dipolar decoupling at high magic-angle spinning frequencies with rotor-synchronised symmetry sequences

We demonstrate here application of symmetry-adapted sequences of the form RN n ν to obtain high-resolution 1H spectra in solid-state nuclear magnetic resonance under high-speed magic-angle spinning. Experimental results are shown for samples of alanine and glycine for spinning speeds up to 30 kHz with radio-frequency nutation rates of around 100 kHz.