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Anisotropic nuclear spin interactions in H₂O@C₆₀ determined by solid-state NMR.
|Title||Anisotropic nuclear spin interactions in H₂O@C₆₀ determined by solid-state NMR.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Concistrè M, Mamone S, Denning M, Pileio G, Lei X, Li Y, Carravetta M, Turro NJ, Levitt MH|
|Journal||Philosophical transactions. Series A, Mathematical, physical, and engineering sciences|
|Date Published||2013 Sep 13|
We report a solid-state NMR study of the anisotropic nuclear spin interactions in H₂O@C₆₀ at room temperature. We find evidence of significant dipole-dipole interactions between the water protons, and also a proton chemical shift anisotropy (CSA) interaction. The principal axes of these interaction tensors are found to be perpendicular. The magnitude of the CSA is too large to be explained by a model in which the water molecules are partially aligned with respect to an external axis. The evidence indicates that the observed CSA is caused by a distortion of the geometry or electronic structure of the fullerene cages, in response to the presence of the endohedral water.
|Alternate Journal||Philos Trans A Math Phys Eng Sci|