Quadrupole effects of [formula omitted] nuclei on the solid-state magic-angle spinning nuclear magnetic resonance spectra of [formula omitted] nuclei Deviations from first-order theory and implications concerning the sign of the indirect coupling constant

Abstract

The effect of the interaction between spin- 3 2 and spin- 1 2 nuclei on solid-state magic-angle spinning nuclear magnetic resonance (MAS NMR) spectra of the latter is studied in cases where deviations from first-order theory are expected. A comparison is made between the exact and first-order perturbation approaches. Both dipolar and indirect (iso- and anisotropic) coupling interactions are considered. Implications regarding 13C, 35,37Cl, 31P, 63,65Cu and 119Sn, 35,37Cl cases are discussed. It is shown that in the latter two cases the sign of the indirect coupling constant J can be derived.