Titre :

Homogeneous broadenings in 2D solid-state NMR of half-integer quadrupolar nuclei

Auteur(s) :

Amoureux, Jean-Paul [Auteur]
Trebosc, Julien [Auteur]

Titre de la revue :

J. Magn. Reson.

Nom court de la revue :

J. Magn. Reson.

Pagination :

311-316

Date de publication :

2006-04

ISSN :

1090-7807

Mot(s)-clé(s) en anglais :

magic-angle spinning NMR
quadrupolar nuclei
multiple-quantum MAS
satellite-transition MAS
high-resolution
homogeneous broadening

Discipline(s) HAL :

Chimie

Résumé en anglais : [en]

The question of the homogeneous broadening that occurs in 2D solid-state NMR experiments is examined. This homogeneous broadening is mathematically introduced in a simple way, versus the irreversible decay rates related ...
Lire la suite >The question of the homogeneous broadening that occurs in 2D solid-state NMR experiments is examined. This homogeneous broadening is mathematically introduced in a simple way, versus the irreversible decay rates related to the coherences that are involved during t1 and t2. We give the pulse sequences and coherence transfer pathways that are used to measure these decay rates. On AlPO4 berlinite, we have measured the 27Al echo-type relaxation times of the central and satellite transitions on 1Q levels, so that of coherences that are situated on 2Q, 3Q, and 5Q levels. We compare the broadenings that can be deduced from these relaxation times to those directly observed on the isotropic projection of berlinite with multiple-quantum magic-angle spinning (MAS), or satellite-transition MAS. We show that the choice of the high-resolution method, should be done according to the spin value and the corresponding homogeneous broadening.Lire moins >

Langue :

Anglais

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 :

2023-05-30T18:32:14Z