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Double-resonance decoupling for resolution enhancement of 31P solid-state MAS and 27Al --> 31P MQHETCOR NMR.

Authors
  • Delevoye, Laurent
  • Fernandez, Christian
  • Morais, Cláudia M
  • Amoureux, Jean-Paul
  • Montouillout, Valérie
  • Rocha, João
Type
Published Article
Journal
Solid State Nuclear Magnetic Resonance
Publisher
Elsevier
Publication Date
Dec 01, 2002
Volume
22
Issue
4
Pages
501–512
Identifiers
PMID: 12539973
Source
Medline
License
Unknown

Abstract

27Al decoupling has been used to remove residual J-coupling interactions between 31P and 27Al in microporous aluminophosphates AlPO4-14 and AlPO4-40. In combination with 1H high-power decoupling, 27Al adapted decoupling yields 31P spectra with optimal sensitivity and resolution. The importance of double-resonance decoupling is further demonstrated by incorporating this technique in the MQHETCOR sequence. Unambiguous assignment of all the AlPO4-14 nuclear magnetic resonances is achieved by combining multiple-quantum evolution in the 27Al dimension and double-resonance decoupling in the 31P acquisition domain.

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