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Article Dans Une Revue Journal of Magnetic Resonance Année : 2009

Double-quantum NMR spectroscopy of P-31 species submitted to very large CSAs

Résumé

We introduce an original pulse sequence, BR2 1 2 ðspsÞ, which is a block super-cycled R2 1 2 sequence employ- ing as basic element a p pulse sandwiched by ‘window’ intervals. This homonuclear dipolar recoupling method allows the efficient excitation of double-quantum coherences between spin-1/2 nuclei submitted to very large chemical shift anisotropy. We demonstrate that this technique can be employed in double- quantum M single-quantum 31 P homonuclear correlation experiment at high magnetic field (B0 P 14 T) and high MAS frequencies (mR P 30 kHz). The performances of BR2 1 2 ðspsÞ are compared to those of the double-quantum recoupling methods, such as BABA and bracketed fp-RFDR, which were already employed at fast MAS rates. The BR2 1 2 ðspsÞ sequence displays a higher robustness to CSA and offset than the other existing techniques.

Domaines

Chimie

Dates et versions

hal-04398542 , version 1 (16-01-2024)

Identifiants

Citer

B. Hu, Laurent Delevoye, Olivier Lafon, Julien Trebosc, Jean-Paul Amoureux. Double-quantum NMR spectroscopy of P-31 species submitted to very large CSAs. Journal of Magnetic Resonance, 2009, Journal of Magnetic Resonance, 200, pp.178-188. ⟨10.1016/j.jmr.2009.06.020⟩. ⟨hal-04398542⟩
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