Enhanced resolution in proton solid-state NMR with very-fast MAS experiments.
We present a new smooth amplitude-modulated (SAM) method that allows to observe highly resolved 1H spectra in solid-state NMR. The method, which works mainly at fast or ultra-fast MAS speed (nu(R)>25 kHz) is complementary to previous methods, such as DUMBO, FSLG/PMLG or symmetry-based sequences. The method is very robust and efficient and does not present line-shape distortions or fake peaks. The main limitation of the method is that it requires a modern console with fast electronics that must be able to define the cosine line-shape in a smooth way, without any transient. However, this limitation mainly occurs at ultra-fast MAS where the rotation period is very short.
Amoureux
Jean-Paul
JP
UCCS (CNRS-8181), University of Lille-1, Fr-59652 Villeneuve d'Ascq, France. jean-paul.amoureux@univ-lille1.fr
Hu
Bingwen
B
Trébosc
Julien
J
D000465:Algorithms; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D011522:Protons; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013113:Spin Labels
D011522:Protons; D013113:Spin Labels