High-order spin diffusion mechanisms in (19)F 2-D NMR of oxyfluorides

J Magn Reson. 1999 Sep;140(1):242-9. doi: 10.1006/jmre.1999.1849.

Abstract

Negative cross-peaks have been observed in the (19)F 2-D magnetization-exchange MAS NMR spectra of Ba(2)MoO(3)F(4) under fast-spinning conditions. The polarization transfer dynamics are studied as a function of the spinning frequency and the frequency separation of the resonances. The results are consistent with a novel mechanism, in which four spins simultaneously exchange Zeeman magnetization with each other, in an energy-conserving process.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Chemical Phenomena
  • Chemistry, Inorganic
  • Fluorides / chemistry*
  • Magnetic Resonance Spectroscopy / methods*
  • Mathematics
  • Molecular Structure
  • Molybdenum / chemistry*
  • Oxygen / chemistry*

Substances

  • Molybdenum
  • Fluorides
  • Oxygen