Dipolar dephasing between quadrupolar and spin- 1 2 nuclei. REDOR and TEDOR NMR experiments on VPI-5

C. A. Fyfe, K. T. Mueller, H. Grondey, K. C. Wong-Moon

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88 Scopus citations

Abstract

In this work we examine the use of dipolar-dephasing magic-angle spinning NMR to study mixed pairs of quadrupolar and spin- 1 2 nuclei in solids. Dipolar connectivities are examined in both directions between the 27Al (I=5/2) spins in the very large pore aluminophosphate VPI-5, which is considered representative of a range of inorganic framework materials. Rotational-echo double-resonance (REDOR) and transferred-echo double-resonance (TEDOR) experiments are demonstrated, as well as a two-dimensional extension of the TEDOR experiment. These experiments restore the heteronuclear dipolar coupling under MAS conditions via a train of radiofrequency pulses, thereby providing information about connectivities and distances between coupled nuclei in these inorganic solids.

Original languageEnglish (US)
Pages (from-to)198-204
Number of pages7
JournalChemical Physics Letters
Volume199
Issue number1-2
DOIs
StatePublished - Oct 30 1992

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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