J-Stabilization of singlet states in the solution NMR of multiple-spin systems
J-Stabilization of singlet states in the solution NMR of multiple-spin systems
Long-lived singlet states have been observed in the solution NMR of spin systems containing more than two coupled spins, despite the fact that the singlet state is expected to be quenched by small long-range J-couplings. We show that the stability of localized singlet states may be explained by taking into account the intra-pair J-coupling between the two spins which participate in the singlet state. The relatively strong intra-pair J-coupling protects the singlet state against quenching by weaker out-of-pair J-couplings.
nuclear-magnetic-resonance, para-hydrogen, field, parahydrogen-induced polarization, alignment, relaxation, long-lived spin states, singlet states, spectroscopy
141-145
Pileio, G.
13f78e66-0707-4438-b9c9-6dbd3eb7d4e8
Levitt, M.H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
2007
Pileio, G.
13f78e66-0707-4438-b9c9-6dbd3eb7d4e8
Levitt, M.H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Pileio, G. and Levitt, M.H.
(2007)
J-Stabilization of singlet states in the solution NMR of multiple-spin systems.
Journal of Magnetic Resonance, 187 (1), .
(doi:10.1016/j.jmr.2007.03.019).
Abstract
Long-lived singlet states have been observed in the solution NMR of spin systems containing more than two coupled spins, despite the fact that the singlet state is expected to be quenched by small long-range J-couplings. We show that the stability of localized singlet states may be explained by taking into account the intra-pair J-coupling between the two spins which participate in the singlet state. The relatively strong intra-pair J-coupling protects the singlet state against quenching by weaker out-of-pair J-couplings.
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Published date: 2007
Keywords:
nuclear-magnetic-resonance, para-hydrogen, field, parahydrogen-induced polarization, alignment, relaxation, long-lived spin states, singlet states, spectroscopy
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Local EPrints ID: 54362
URI: http://eprints.soton.ac.uk/id/eprint/54362
PURE UUID: d58e8865-5969-46b2-9ece-71824e405bec
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Date deposited: 30 Jul 2008
Last modified: 16 Mar 2024 03:47
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