1H-1H double-quantum CRAMPS NMR at very-fast MAS (nuR=35 kHz): a resolution enhancement method to probe 1H-1H proximities in solids.
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.
Mafra
Luís
L
Department of Chemistry, University of Aveiro, Campus de Santiago, CICECO, 3810-193 Aveiro, Portugal. lmafra@ua.pt
Gomes
José R B
JR
Trébosc
Julien
J
Rocha
João
J
Amoureux
Jean-Paul
JP
D000465:Algorithms; D003198:Computer Simulation; D006859:Hydrogen / Q000032:analysis* / Q000737:chemistry*; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D011522:Protons; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D011522:Protons; D006859:Hydrogen