Novel satellites in a two-dimensional spin-echo NMR experiment for homonuclear dipole-coupled spins in rotating solids

Additional resonance lines emerged along the F1 axis on a two-dimensional (2D) NMR spectrum, when the 2D spin–echo pulse sequence was applied to a solid-state homonuclear two-spin system with a negligibly small J-coupling constant under magic-angle sample spinning. We found that the positions of the lines are determined by the sample spinning frequency and the difference of the isotropic chemical shifts.