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

Authors
Du, LS Levitt, MH Grey, CP
Citation
Ls. Du et al., High-order spin diffusion mechanisms in F-19 2-D NMR of oxyfluorides, J MAGN RES, 140(1), 1999, pp. 242-249
Citations number
26
Categorie Soggetti
Chemistry & Analysis","Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF MAGNETIC RESONANCE
ISSN journal
10907807 → ACNP
Volume
140
Issue
1
Year of publication
1999
Pages
242 - 249
Database
ISI
SICI code
1090-7807(199909)140:1<242:HSDMIF>2.0.ZU;2-P
Abstract
Negative cross-peaks have been observed in the F-19 2-D magnetization-excha nge MAS NMR spectre of Ba2MoO3F4 under fast-spinning conditions. The polari zation transfer dynamics are studied as a function of the spinning frequenc y and the frequency separation of the resonances. The results are consisten t with a novel mechanism, in which four spins simultaneously exchange Zeema n magnetization with each other, in an energy-conserving process. (C) 1999 Academic Press.