1H-1H double-quantum CRAMPS NMR at very-fast MAS (nuR=35 kHz): a resolution enhancement method to probe 1H-1H proximities in solids.

Autor: Mafra L; Department of Chemistry, University of Aveiro, Campus de Santiago, CICECO, 3810-193 Aveiro, Portugal. lmafra@ua.pt, Gomes JR, Trébosc J, Rocha J, Amoureux JP
Jazyk: angličtina
Zdroj: Journal of magnetic resonance (San Diego, Calif. : 1997) [J Magn Reson] 2009 Jan; Vol. 196 (1), pp. 88-91. Date of Electronic Publication: 2008 Oct 12.
DOI: 10.1016/j.jmr.2008.10.009
Abstrakt: A High-resolution two-dimensional (2D) (1)H double-quantum (DQ) homonuclear recoupling experiments, combined with smooth amplitude-modulation (SAM) homonuclear decoupling is presented. The experiment affords highly resolved and clean (1)H DQ-SQ 2D spectra at very-fast MAS rates (nu(R)=35 kHz). The method is well suited to probe (1)H-(1)H distances in powdered solids and demonstrations are applied on a NaH(2)PO(4) powdered sample, an inorganic compound having hydrogen bonding networks.
Databáze: MEDLINE
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