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Double-Resonance Decoupling for Resolution Enhancement of 31P Solid-State MAS and 27Al →31 P MQHETCOR NMR

✍ Scribed by Laurent Delevoye; Christian Fernandez; Cláudia M Morais; Jean-Paul Amoureux; Valérie Montouillout; João Rocha

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 202 KB
Volume: 22
Category: Article
ISSN: 0926-2040
DOI: 10.1006/snmr.2002.0080

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✦ Synopsis

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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