Exciting Wide NMR Spectra of Static Solid Samples with Weak Radiofrequency Fields - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Zeitschrift für Physikalische Chemie Année : 2017

Exciting Wide NMR Spectra of Static Solid Samples with Weak Radiofrequency Fields

Résumé

Trains of short pulses in the manner of ‘delays alternating with nutations for tailored excitation’ (DANTE) have been applied to the Pake patterns of protons of water molecules trapped in a static powdered sample of barium chlorate monohydrate. The spin dynamics in the course of such experiments have been investigated by means of numerical simulations and compared with the ideal refocusing that can be achieved under magic-angle spinning (MAS). Solid echoes yield essentially undistorted lineshapes, in contrast to direct excitation without refocusing that leads to severe dispersions of the phases because of inhomogeneous interactions such as homonuclear dipolar couplings and anisotropic chemical shifts. The selectivity of DANTE sequences allows one to access ‘slices’ of the Pake pattern that can be related to particular crystallite orientations. Single-crystal spectra can therefore be extracted from powder spectra. A similar behavior is expected for both dipolar and quadrupolar echoes.
Fichier principal
Vignette du fichier
Carnevale_2016_Exciting_Wide_NMR.pdf (1.26 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01501410 , version 1 (04-04-2017)

Identifiants

Citer

Diego Carnevale, Srinivas Chinthalapalli, Geoffrey Bodenhausen. Exciting Wide NMR Spectra of Static Solid Samples with Weak Radiofrequency Fields. Zeitschrift für Physikalische Chemie, 2017, 231 (3), pp.527-543. ⟨10.1515/zpch-2016-0808⟩. ⟨hal-01501410⟩
206 Consultations
281 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More