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High resolution solid-state N.M.R.
Molecular Physics · 1988 · Vol. 65(4) · pp. 1013–1018
Ago Samoson✉(University of California, Berkeley)É. Lippmaa(Lawrence Berkeley National Laboratory)Alexander Pines(University of California, Berkeley)
Abstract
By means of rotations around two axes inclined at zeros (magic angles) of the l = 2 and l = 4 Legendre polynomials, first-order and second-order N.M.R. broadening can be averaged away. Experiments with a double-rotor on the central (1/2 ↔ - 1/2) transition of sodium-23 in polycrystalline sodium oxalate illustrate the elimination of broadening due to second-order quadrupolar effects leading to a thirtyfold increase in resolution compared to magic-angle spinning.
Advanced NMR Techniques and ApplicationsNMR spectroscopy and applicationsSolid-state spectroscopy and crystallographyLegendre polynomialsSpinningResolution (logic)SodiumChemistryCrystalliteOrder (exchange)Magic angleMAGIC (telescope)Mathematics
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