Long-lived nuclear spin states in rapidly rotating CH2D groups
Long-lived nuclear spin states in rapidly rotating CH2D groups
Although monodeuterated methyl groups support proton long-lived states, hindering of the methyl rotation limits the singlet relaxation time. We demonstrate an experimental case in which the rapid rotation of the CH2D group extends the singlet lifetime but does not quench the chemical shift difference between the CH2D protons, induced by the chiral environment. Proton singlet order is accessed using Spin-Lock Induced Crossing (SLIC) experiments, showing that the singlet relaxation time TSTS is over 2 min, exceeding the longitudinal relaxation time T1T1 by a factor of more than 10. This result shows that proton singlet states may be accessible and long-lived in rapidly rotating CH2D groups.
87-90
Elliott, Stuart
6cc724de-f75f-4c0f-a00a-e712b4e73b12
Brown, Lynda J.
75aa95fa-5d27-46a7-9dbe-0f465a664f5b
Dumez, Jean-Nicolas
9e2e29e1-fe59-40ea-97e0-e4dce6a12e8c
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
November 2016
Elliott, Stuart
6cc724de-f75f-4c0f-a00a-e712b4e73b12
Brown, Lynda J.
75aa95fa-5d27-46a7-9dbe-0f465a664f5b
Dumez, Jean-Nicolas
9e2e29e1-fe59-40ea-97e0-e4dce6a12e8c
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Elliott, Stuart, Brown, Lynda J., Dumez, Jean-Nicolas and Levitt, Malcolm H.
(2016)
Long-lived nuclear spin states in rapidly rotating CH2D groups.
Journal of Magnetic Resonance, 272, .
(doi:10.1016/j.jmr.2016.09.009).
Abstract
Although monodeuterated methyl groups support proton long-lived states, hindering of the methyl rotation limits the singlet relaxation time. We demonstrate an experimental case in which the rapid rotation of the CH2D group extends the singlet lifetime but does not quench the chemical shift difference between the CH2D protons, induced by the chiral environment. Proton singlet order is accessed using Spin-Lock Induced Crossing (SLIC) experiments, showing that the singlet relaxation time TSTS is over 2 min, exceeding the longitudinal relaxation time T1T1 by a factor of more than 10. This result shows that proton singlet states may be accessible and long-lived in rapidly rotating CH2D groups.
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Long-lived nuclear spin states in rapidly rotating CH2D groups
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Accepted/In Press date: 15 September 2016
e-pub ahead of print date: 16 September 2016
Published date: November 2016
Organisations:
Magnetic Resonance
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Local EPrints ID: 400728
URI: http://eprints.soton.ac.uk/id/eprint/400728
PURE UUID: 91e9bc3b-8266-4c26-8653-ccb530113edb
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Date deposited: 26 Sep 2016 08:15
Last modified: 15 Mar 2024 05:54
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Author:
Stuart Elliott
Author:
Jean-Nicolas Dumez
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