Double-resonance decoupling for resolution enhancement of 31P solid-state MAS and 27Al --> 31P MQHETCOR NMR.
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.
Delevoye
Laurent
L
Laboratoire d'Applications, RMN, Bruker BioSpin SA, 34, rue de l'Industrie, 67166 Wissembourg, France. laurent.delevoye@bruker.fr
Fernandez
Christian
C
Morais
Cláudia M
CM
Amoureux
Jean-Paul
JP
Montouillout
Valérie
V
Rocha
João
J
D017607:Aluminum Compounds / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D010710:Phosphates / Q000737:chemistry; D010759:Phosphorus Isotopes / Q000737:chemistry*
D017607:Aluminum Compounds; D010710:Phosphates; D010759:Phosphorus Isotopes; C012714:aluminum phosphate