Satellite-Transition MAS NMR of Low-gamma Nuclei at Natural Abundance: Sensitivity, Practical Implementation and Application to 39K (I = 3/2) and 25Mg (I = 5/2)

Nicholas G Dowell, Sharon Elizabeth Ashbrook, Stephen Wimperis

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26 Citations (Scopus)

Abstract

Satellite-transition magic angle spinning (STMAS) is a recently introduced technique for recording high-resolution NMR spectra of quadrupolar nuclei in solids. We present numerical calculations of STMAS signal intensity as a function of radio frequency field strength (v(1)) and spinning rate (v(R)) and show that the sensitivity advantage of STMAS over the older multiple-quantum technique (MQMAS) is greatest for low v(1) field strengths and high v(R) rates, making STMAS particularly suitable for the study of low-gamma nuclei. The practical implementation of STMAS in NMR of low-y nuclei is discussed and several experimental examples of high-resolution K-39 (I = 3/2) and Mg-25 (I = 5/2) NMR spectra are presented, including Mg-25 spectra of brucite (Mg(OH)(2)), diopside (CaMgSi2O6), and talc (Mg3Si4O10(OH)(2)) recorded at the natural Mg-25 abundance of 10%.

Original languageEnglish
Pages (from-to)13292-13299
Number of pages8
JournalJournal of Physical Chemistry B
Volume108
DOIs
Publication statusPublished - 2 Sept 2004

Keywords

  • MULTIPLE-QUANTUM MAS
  • ANGLE-SPINNING NMR
  • QUADRUPOLAR NUCLEI
  • MQMAS NMR
  • SPECTROSCOPY
  • RESOLUTION
  • REFINEMENT
  • WADSLEYITE
  • SPECTRA

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