Titre :

Double-quantum homonuclear NMR correlation spectroscopy of quadrupolar nuclei subjected to magic-angle spinning and high magnetic field

Auteur(s) :

Wang, Q. [Auteur]
Chinese Academy of Sciences [Beijing] [CAS]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Hu, B. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lafon, Olivier [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Trebosc, Julien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Deng, F. [Auteur]
Chinese Academy of Sciences [Beijing] [CAS]
Amoureux, Jean-Paul [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Titre de la revue :

Journal of Magnetic Resonance

Nom court de la revue :

J. Magn. Reson.

Numéro :

200

Pagination :

251-260

Date de publication :

2009-10-01

ISSN :

1090-7807

Mot(s)-clé(s) en anglais :

Double-quanta spectroscopy
Fast MAS
Half-integer quadrupolar nuclei
Solid-state NMR

Discipline(s) HAL :

Chimie

Résumé en anglais : [en]

We present a new application of the symmetry-based dipolar recoupling scheme, for exciting directly double-quantum (2Q) coherences between the central transition of homonuclear half-integer quadrupolar nuclei. With respect ...
Lire la suite >We present a new application of the symmetry-based dipolar recoupling scheme, for exciting directly double-quantum (2Q) coherences between the central transition of homonuclear half-integer quadrupolar nuclei. With respect to previously published 2Q-recoupling methods (M. Eden, D. Zhou, J. Yu, Chem. Phys. Lett. 431 (2006) 397), the sequence is used without π/2 bracketing pulses and with an original super-cycling. This leads to an improved efficiency (a factor of two for spin-5/2) and to a much higher robustness to radio-frequency field inhomogeneity and resonance offset. The 2Q-coherence excitation performances are demonstrated experimentally by 27Al NMR experiments on the aluminophosphates berlinite, VPI5, AlPO4-14, and AlPO4-CJ3. The two-dimensional 2Q–1Q correlation experiments incorporating these recoupling sequences allow the observation of 2Q cross-peaks between central transitions, even at high magnetic field where the difference in offset between octahedral and tetrahedral 27Al sites exceeds 10 kHz.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

RMN et matériaux inorganiques (RM2I)

Date de dépôt :

2023-05-30T18:02:23Z
2024-04-29T10:42:13Z