Determination of 51V quadrupole and chemical shift tensor orientations in V2O5 by analysis of magic-angle spinning nuclear magnetic resonance spectra.
Magic-angle spinning (MAS) 51V nuclear magnetic resonance (NMR) spectra of V2O5 have been recorded at various fields to evidence the relative effects of the quadrupole interaction and electronic shielding at the nucleus. A refinement of the spectra using theoretical simulations has been performed assuming a simultaneous existence of these two anisotropic interactions. The relative orientation of the principal axes for both tensors has been obtained. The results agree with previous single-crystal studies. Reliability of the results is discussed. A fundamental indetermination of the actual relative tensor orientations remains, owing to the powder nature of the sample.
Laboratorie de Dynamique et Structure des Matériaux Moléculaires, CNRS URA 801, Université des Sciences el Technologies de Lille, Villeneuve d'Ascq, France.
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C
Fernandez
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P
Bodart
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JP
Amoureux
D016880:Anisotropy; D003198:Computer Simulation; D007554:Isotopes; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D015203:Reproducibility of Results; D014639:Vanadium; D017968:Vanadium Compounds / Q000737:chemistry*
D007554:Isotopes; D017968:Vanadium Compounds; D014639:Vanadium; C066075:vanadium pentoxide