Sideband analysis in DOR NMR spectra. I. "Infinite" inner-rotor speed

DOR (double orientation rotation) solid-state NMR spectra are analyzed. All mathematical tools useful for describing the DOR spectra of nuclei simultaneously subjected to CSA and quadrupole interactions with non-coincident PAS are developed. The "infinite" inner-rotor speed approximation is described. The corresponding spectra observed in synchronized or unsynchronized experiments are analyzed. The rf pulse and recycle time effects are observed and explained. The comparison of MAS and DOR spectra on several compounds allows the determination of when the DOR technique is preferred to the MAS technique.