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NMR in rotating solids

Maricq, M.Matti, Waugh, J. S.·1979·The Journal of Chemical Physics

Abstract

The NMR free induction decay from a spinning sample having inhomogeneous anisotropic interactions (chemical shifts, first order quadrupole couplings) takes the form of a train of rotational spin echoes. The Fourier transform of the echo envelope is a sharp spectrum from which the effects of anisotropy have been removed. The Fourier transform of the echo shape contains information concerning the anisotropies: This information can be extracted by a moment analysis. The effects of localized homonuclear spin–spin interactions are to convert the ’’isotropic’’ spectrum into a characteristic powder pattern. Second order quadrupole coupling produces a similar effect. It is shown in this case that the usual second-order level shifts cannot be used to calculated this pattern, which must be described by a proper average Hamiltonian theory. Finally it is shown that rotational spin echoes provide a convenient means of studying very slow random molecular rotations (τc≲1 sec).

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Metadata

Authors
Maricq, M. M., & Waugh, J. S.
Venue
The Journal of Chemical Physics
Published
1979-04-01
Volume
70
Issue
7
Pages
3300-3316
ISSN
  • 0021-9606 (ISSN-L)
  • 1089-7690
OpenAlex
W1975487233
Cited by
1,305
References
0
FWCI
13.30
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: NMR in rotating solids. https://app.cochat.ai/papers/10.1063/1.437915
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Maricq, M. M., & Waugh, J. S. (1979). NMR in rotating solids. The Journal of Chemical Physics. https://doi.org/10.1063/1.437915

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