Multiple-Quantum Cross-Polarization in MAS NMR of Quadrupolar Nuclei

Sharon Elizabeth Ashbrook, Steven P Brown, Stephen Wimperis

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Using Al-27 (I= 5/2) NMR of aluminium acetylacetonate, we show that it is possible to cross-polarize from a spin I=1/2 nucleus (H-1) directly to the central triple-quantum transition of a half-integer quadrupolar nucleus (Al-27) in a powdered sample under MAS conditions. The optimum conditions for this multiple-quantum cross-polarization (MQCP) are investigated experimentally and compared with existing theoretical results. The new technique is applied to the recently introduced two-dimensional MQMAS experiment for recording high-resolution NMR spectra of half-integer quadrupolar nuclei. (C) 1998 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)509-517
Number of pages9
JournalChemical Physics Letters
Volume288
DOIs
Publication statusPublished - 22 May 1998

Keywords

  • ANGLE-SPINNING NMR
  • SPECTROSCOPY
  • SOLIDS
  • AL-27
  • SYSTEMS
  • SPINS

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