Retrieval of solid-state 31P nuclear magnetic resonance (NMR) chemical shielding parameters: proposal of an approach concerning variable-temperature 31P NMR mass spectra of urea phosphate and comparison of different methods

Abstract

Several methods are used to retrieve the principal components of the 31P chemical shielding tensor from variable-temperature 31P NMR spectra of urea phosphate (both static and spinning at the magic angle at low speeds). A complementary approach is proposed for the study of small changes in these parameters, based on the measurement of selected side-band intensities which are most sensitive to changes in σ.