Nuclear spin conversion of water inside fullerene cages detected by low-temperature nuclear magnetic resonance
Nuclear spin conversion of water inside fullerene cages detected by low-temperature nuclear magnetic resonance
The water-endofullerene H2O@C60 provides a unique chemical system in which freely rotating water molecules are confined inside homogeneous and symmetrical carbon cages. The spin conversion between the ortho and para species of the endohedral H2O was studied in the solid phase by low-temperature nuclear magnetic resonance. The experimental data are consistent with a second-order kinetics, indicating a bimolecular spin conversion process. Numerical simulations suggest the simultaneous presence of a spin diffusion process allowing neighbouring ortho and para molecules to exchange their angular momenta. Cross-polarization experiments found no evidence that the spin conversion of the endohedral H2O molecules is catalysed by 13C nuclei present in the cages.
194306
Mamone, Salvatore
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Concistrè, Maria
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Carignani, Elisa
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Meier, Benno
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Krachmalnicoff, Andrea
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Johannessen, Ole G.
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Lei, Xuegong
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Li, Yongjun
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Denning, Mark
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Carravetta, Marina
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Goh, Kelvin
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Horsewill, Anthony J.
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Whitby, Richard J.
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Levitt, Malcolm H.
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20 May 2014
Mamone, Salvatore
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Concistrè, Maria
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Carignani, Elisa
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Meier, Benno
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Krachmalnicoff, Andrea
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Johannessen, Ole G.
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Lei, Xuegong
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Li, Yongjun
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Denning, Mark
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Carravetta, Marina
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Goh, Kelvin
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Horsewill, Anthony J.
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Whitby, Richard J.
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Levitt, Malcolm H.
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Mamone, Salvatore, Concistrè, Maria, Carignani, Elisa, Meier, Benno, Krachmalnicoff, Andrea, Johannessen, Ole G., Lei, Xuegong, Li, Yongjun, Denning, Mark, Carravetta, Marina, Goh, Kelvin, Horsewill, Anthony J., Whitby, Richard J. and Levitt, Malcolm H.
(2014)
Nuclear spin conversion of water inside fullerene cages detected by low-temperature nuclear magnetic resonance.
The Journal of Chemical Physics, 140 (19), .
(doi:10.1063/1.4873343).
Abstract
The water-endofullerene H2O@C60 provides a unique chemical system in which freely rotating water molecules are confined inside homogeneous and symmetrical carbon cages. The spin conversion between the ortho and para species of the endohedral H2O was studied in the solid phase by low-temperature nuclear magnetic resonance. The experimental data are consistent with a second-order kinetics, indicating a bimolecular spin conversion process. Numerical simulations suggest the simultaneous presence of a spin diffusion process allowing neighbouring ortho and para molecules to exchange their angular momenta. Cross-polarization experiments found no evidence that the spin conversion of the endohedral H2O molecules is catalysed by 13C nuclei present in the cages.
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1.4873343.pdf
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Published date: 20 May 2014
Organisations:
Magnetic Resonance
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Local EPrints ID: 369193
URI: http://eprints.soton.ac.uk/id/eprint/369193
ISSN: 0021-9606
PURE UUID: 4fe01286-d686-4663-b581-1de6c5657ccc
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Date deposited: 30 Sep 2014 10:55
Last modified: 15 Mar 2024 03:32
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Contributors
Author:
Salvatore Mamone
Author:
Maria Concistrè
Author:
Elisa Carignani
Author:
Benno Meier
Author:
Andrea Krachmalnicoff
Author:
Ole G. Johannessen
Author:
Xuegong Lei
Author:
Yongjun Li
Author:
Mark Denning
Author:
Kelvin Goh
Author:
Anthony J. Horsewill
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