Research & Teaching Faculty

DIPOLAR DEPHASING BETWEEN QUADRUPOLAR AND SPIN-1/2 NUCLEI - REDOR AND TEDOR NMR EXPERIMENTS ON VPI-5

TitleDIPOLAR DEPHASING BETWEEN QUADRUPOLAR AND SPIN-1/2 NUCLEI - REDOR AND TEDOR NMR EXPERIMENTS ON VPI-5
Publication TypeJournal Article
Year of Publication1992
AuthorsFyfe, CA, Mueller, KT, Grondey, H, Wongmoon, KC
JournalChemical Physics Letters
Volume199
Pagination198-204
Date PublishedOct
Type of ArticleArticle
ISBN Number0009-2614
KeywordsANGLE, COUPLINGS, DOUBLE-RESONANCE NMR, MAGIC, MAGNETIC-RESONANCE, SOLIDS, SPECTROSCOPY, TWO-DIMENSIONAL NMR
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 Al-27(I=5/2) and P-31(I=1/2) 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.

URL<Go to ISI>://A1992JV10700030