Motional Broadening: an Important Distinction Between Multiple-Quantum and Satellite-Transition MAS NMR of Quadrupolar Nuclei

Sharon Elizabeth Ashbrook, Sasa Antonijevic, Andrew J Berry, Stephen Wimperis

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

Multiple-quantum (MQ) and satellite-transition (ST) magic-angle spinning (MAS) are two very similar techniques used to obtain high-resolution or 'isotropic' NMR spectra of half-integer quadrupolar nuclei. In a variety of materials it is observed that some STMAS peaks are very broad compared with the corresponding MQMAS peaks, sometimes so broad that they are unobservable. We present O-17 (I = 5/2) NMR spectra of two materials, chondrodite (2Mg(2)SiO(4).Mg(OH)(2)) and clinohumite (4Mg(2)SiO(4).Mg(OH)(2)), exhibiting this phenomenon and show that the cause is motional broadening arising from the combined effects of molecular reorientation, the quadrupolar interaction and MAS. (C) 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)634-642
Number of pages9
JournalChemical Physics Letters
Volume364
DOIs
Publication statusPublished - 16 Oct 2002

Keywords

  • ANGLE-SPINNING NMR
  • SPECTRA
  • SPECTROSCOPY
  • HYDROGEN

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