Theory and applications of supercycled symmetry-based recoupling sequences in solid-state nuclear magnetic resonance.
We present the theoretical principles of supercycled symmetry-based recoupling sequences in solid-state magic-angle-spinning NMR. We discuss the construction procedure of the SR26 pulse sequence, which is a particularly robust sequence for double-quantum homonuclear dipole-dipole recoupling. The supercycle removes destructive higher-order average Hamiltonian terms and renders the sequence robust over long time intervals. We demonstrate applications of the SR26 sequence to double-quantum spectroscopy, homonuclear spin counting, and determination of the relative orientations of chemical shift anisotropy tensors.
Kristiansen
Per Eugen
PE
Department of Molecular Biosciences, University of Oslo, P.O. Box 1041-Blindern, 0316 Oslo, Norway.
Carravetta
Marina
M
van Beek
Jacco D
JD
Lai
Wai Cheu
WC
Levitt
Malcolm H
MH