Repetitive sideband-selective double frequency sweeps for sensitivity enhancement of MAS NMR of half-integer quadrupolar nuclei

► An improved double frequency sweep for enhancing quadrupolar NMR spectra. ► Adiabatic inversion of the satellite transition sidebands under magic angle spinning. ► Enhancements of ∼3 are achieved by applying this sideband selective DFS to 27Al . ► Repetitive application of the ssDFS leads to sensitivity enhancements of up to 5. ► Spectral editing by selectively enhancing one of the quadrupolar sites using ssDFS.