Double-Resonance Decoupling for Resolution Enhancement of P Solid-State MAS and Al → P MQHETCOR NMR期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Authors:	Laurent Delevoye Christian Fernandez Cludia M Morais Jean-Paul Amoureux Valrie Montouillout Joo Rocha

Institution:	^a Laboratoire d'Applications, RMN, Bruker BioSpin SA, 34, rue de l'Industrie, 67166, Wissembourg, France ^b Laboratoire de Catalyse et Spectrochimie, CNRS UMR6506, ISMRA/Université de CAEN, 6 Bld. Maréchal Juin, 14050, Caen, France ^c Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal ^d LCPS, CNRS-8012, Université de Lille 1, 59655, Villeneuve d'Ascq, France

Abstract:	²⁷Al decoupling has been used to remove residual J-coupling interactions between³¹ P 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.

Keywords:	quadrupolar nuclei decoupling J-coupling interaction aluminophosphates MQHETCOR
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