Heteronuclear dipolar decoupling effects on multiple-quantum and satellite-transition magic-angle spinning NMR spectra. - Université de Lille Accéder directement au contenu
Article Dans Une Revue Magnetic Resonance in Chemistry Année : 2008

Heteronuclear dipolar decoupling effects on multiple-quantum and satellite-transition magic-angle spinning NMR spectra.

Résumé

We here report on the influence of heteronuclear dipolar decoupling on the 27Al 3QMAS, 5QMAS, and the double-quantum filter–satellite-transition magic-angle spinning (DQF-STMAS) spectra of a strongly dipolar-coupled system, gibbsite. The requirements for heteronuclear dipolar decoupling increase with the order of coherence evolving in the indirect dimension of a two-dimensional (2D) experiment. The isotropic line width of the high-resolution 2D spectra, in samples like gibbsite, is composed of four parts: the distribution of isotropic shifts (δISO, δQIS), the homogeneous broadening related to the proton–proton flip-flop terms, the 27Al27Al homonulcear dipolar couplings, and the 1H27Al heteronuclear dipolar couplings. It is shown that, even in the case of gibbsite, where a strong proton–proton bath exists, the main resolution limiting factor in these experiments resides in the 1H27Al dipolar interaction.

Dates et versions

hal-04560360 , version 1 (26-04-2024)

Identifiants

Citer

S. Ganapathy, Laurent Delevoye, Jean-Paul Amoureux, P. K. Madhu. Heteronuclear dipolar decoupling effects on multiple-quantum and satellite-transition magic-angle spinning NMR spectra.. Magnetic Resonance in Chemistry, 2008, Magnetic Resonance in Chemistry, 46, pp.948-54. ⟨10.1002/mrc.2286⟩. ⟨hal-04560360⟩
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