Effects of radial radio-frequency field inhomogeneity on MAS solid-state NMR experiments.

ABSTRACT: Radio-frequency field inhomogeneity is one of the most common imperfections in NMR experiments. They can lead to imperfect flip angles of applied radio-frequency (rf) pulses or to a mismatch of resonance conditions, resulting in artefacts or degraded performance of experiments. In solid-state NMR under magic angle spinning (MAS), the radial component becomes time-dependent because the rf irradiation amplitude and phase is modulated with integer multiples of the spinning frequency. We analyse the influence of such time-dependent MAS-modulated rf fields on the performance of some commonly used building blocks of solid-state NMR experiments. This analysis is based on analytical Floquet calculations and numerical simulations, taking into account the time dependence of the rf field. We find tha

SUBMITTER: Aebischer K 

PROVIDER: S-EPMC10539735 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature