Solid state NMR studies of the fluoride containing zeolite SSZ-44

RJ Darton, DH Brouwer, CA Fyfe, LA Villaescusa, Russell Edward Morris

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Magic-angle spinning NMR has been used to probe the local structure of as-made zeolite SFF containing occluded fluoride and NN-diethyl-2,6-dimethylpiperidinium. The Si-F bond distance has been measured using two methods: variable contact time cross polarization studies (1.74 Angstrom) and spinning sideband intensity fitting at relatively slow spinning speeds (1.79 Angstrom). Both measurements yield results that are significantly shorter than the internuclear Si-F distance as measured by single-crystal X-ray diffraction (similar to1.9 Angstrom), which is based on the average positions of the atoms due to disorder and hence does not reflect the true bond distance.

Original languageEnglish
Pages (from-to)600-603
Number of pages4
JournalChemistry of Materials
Volume16
DOIs
Publication statusPublished - 24 Feb 2004

Keywords

  • 5-COORDINATE SILICON
  • MOLECULAR-SIEVES
  • MEDIA
  • SPECTROSCOPY
  • LOCATION
  • TEMPLATE
  • COMPLEX
  • IONS
  • STF
  • IFR

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