Solid-State Oxygen-17 Nuclear Magnetic Resonance Spectroscopic Studies of Zeolites and Related Systems

Hye Kyung C. Timken, Gary L. Turner, Eric Oldfield, Jean Pierre Gilson, L. B. Welsh

Research output: Contribution to journalArticle

Abstract

We have obtained static, “magic-angle”, and “variable-angle” sample-spinning 17O NMR spectra of 17O-labeled A, Y, and dealuminated Y zeolites at 67.8 and 48.8 MHz (corresponding to magnetic field strengths of 11.7 and 8.45 T). Our results indicate that the ranges of 17O nuclear quadrupole coupling constants (e2qQ/h) of the Si[170]Al and Si[17O]Si fragments are 3.1-3.2 and 4.6-5.2 MHz, respectively, in general agreement with those predicted on the basis of the empirical correlation presented previously (Schramm, S.; Oldfield, E. J. Am. Chem. Soc. 1984, 106, 2502). The asymmetry parameters are 0.2 for Si[170]Al and 0.1 for Si[17O]Si. The isotropic chemical shifts of the Si[170]Al fragments are in the range of 31–45 ppm relative to H20, while those of the Si[17O]Si fragments are in the range of 44–57 ppm.

Original languageEnglish (US)
Pages (from-to)7231-7235
Number of pages5
JournalJournal of the American Chemical Society
Volume108
Issue number23
DOIs
StatePublished - 1986

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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