Reduction of spin diffusion artifacts from 2D zfr-INADEQUATE MAS NMR spectra

► Use of a z-filter improves lineshapes in solid state INADEQUATE NMR spectra. ► Frequency-Switched Lee-Goldberg (FSLG) approach is an easy to implement homonuclear decoupling scheme that works well during the z-filter of this experiment. ► Application of homonuclear decoupling during the z-filter can remove artifacts due to spin diffusion.