“Variable-angle” sample-spinning nuclear magnetic resonance spectroscopic studies of non-integral spin quadrupolar nuclei in solids: Analysis of spinning-sidebands for the case η=0

Abstract

We present an average Hamiltonian analysis of the “variable-angle” sample-spinning nuclear magnetic resonance spectra of the central ( 1 2 , − 1 2 ) transition of the I= 3 2 nuclei 23Na (in Na 2MoO 4) and 11B (in a borosilicate glass) in the slow-spinning regime (ω r < W ( 1 2 , − 1 2 ), for a purely second-order quadrupolar interaction and an axially symmetric electric field gradient tensor. We obtain good agreement between theory and experiment. The technique is applicable to the analysis of systems with large quadrupole coupling constants, as well as to those with multiple sites and different coupling constants and chemical shifts.