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Pulsed field gradient multiple-quantum MAS NMR spectroscopy of half-integer spin quadrupolar nuclei

TitlePulsed field gradient multiple-quantum MAS NMR spectroscopy of half-integer spin quadrupolar nuclei
Publication TypeJournal Article
Year of Publication1997
AuthorsFyfe, CA, Skibsted, J, Grondey, H, Altenschildesche, HM zu
JournalChemical Physics Letters
Volume281
Pagination44-48
Date PublishedDec
Type of ArticleArticle
ISBN Number0009-2614
KeywordsANGLE, ROTOR, SOLID-STATE NMR, TRANSITIONS
Abstract

Pulsed field gradients (PFGs) have been applied to select coherence transfer pathways in multiple-quantum (MQ) MAS NMR spectra of half-integer spin quadrupolar nuclei in rigid solids. Al-27 triple-quantum (3Q) MAS NMR spectra of the aluminophosphate molecular sieves VPI-5 and AlPO4-18 have been used to demonstrate the selection of the (0) –> (3) –> (-1) coherence transfer pathway using PFGs and no phase cycling. Compared to MQMAS experiments that employ phase cycling schemes, the main advantage of the PFG-MQMAS technique is its simplicity, which should facilitate the combination of MQMAS with other pulse sequences. (C) 1997 Elsevier Science B.V.

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