Solid-State Gallium-69 and Gallium-71 Nuclear Magnetic Resonance Spectroscopic Studies of Gallium Analogue Zeolites and Related Systems

Hye Kyung C. Timken, Eric Oldfield

Research output: Contribution to journalArticlepeer-review

Abstract

We have obtained solid-state 11,7-T69Ga and71Ga nuclear magnetic resonance (NMR) spectra of a series of gallosilicates (gallium analogues of zeolites Na-X, Na-Y, Na-sodalite, and Na-natrolite). From the apparent69Ga and71Ga chemical shifts, values of the nuclear quadrupole coupling constants (e1qQ/h) and the true, isotropic chemical shifts (5;) have been deduced for the framework, tetrahedral, Ga(OSi)4sites. The e23 4 56qQ/h values are in the range 1.9-2.7 MHz for69Ga and 1.2-1.7 MHz for71Ga. The isotropic chemical shifts are all in the range 171–186 ppm downfield from an external standard of 1 M Ga(N03)3. Our results indicate that measurement of the apparent (second-order shifted) chemical shifts for pairs of isotopes of nonintegral spin quadrupolar nuclei in solids at one magnetic field strength is a useful new approach for determination of both isotropic chemical shifts and nuclear quadrupole coupling constant values.

Original languageEnglish (US)
Pages (from-to)7669-7673
Number of pages5
JournalJournal of the American Chemical Society
Volume109
Issue number25
DOIs
StatePublished - Dec 1 1987

ASJC Scopus subject areas

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

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