Theory of long-lived nuclear spin states in solution nuclear magnetic resonance. II. Singlet spin locking
Theory of long-lived nuclear spin states in solution nuclear magnetic resonance. II. Singlet spin locking
In a previous paper [M. Carravetta and M. H. Levitt, J. Chem. Phys. 122, 214505 (2005)], we presented the theory of long-lived nuclear spin singlet states in low magnetic field. In this paper, we consider the spin locking of long-lived singlet states in high magnetic field by the application of resonant radio frequency irradiation. We present theoretical results for unmodulated irradiation, including approximate analytical expressions for the singlet decay rate constants. We show the results of numerical simulations, which indicate that modulated radio frequency fields may be used to achieve broadband spin locking of singlet states but only in the case of a small difference in Larmor frequencies between the members of the spin pair.
214501
Pileio, Giuseppe
13f78e66-0707-4438-b9c9-6dbd3eb7d4e8
Levitt, Malcolm
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
June 2009
Pileio, Giuseppe
13f78e66-0707-4438-b9c9-6dbd3eb7d4e8
Levitt, Malcolm
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Pileio, Giuseppe and Levitt, Malcolm
(2009)
Theory of long-lived nuclear spin states in solution nuclear magnetic resonance. II. Singlet spin locking.
Journal of Chemical Physics, 130 (21), .
(doi:10.1063/1.3139064).
Abstract
In a previous paper [M. Carravetta and M. H. Levitt, J. Chem. Phys. 122, 214505 (2005)], we presented the theory of long-lived nuclear spin singlet states in low magnetic field. In this paper, we consider the spin locking of long-lived singlet states in high magnetic field by the application of resonant radio frequency irradiation. We present theoretical results for unmodulated irradiation, including approximate analytical expressions for the singlet decay rate constants. We show the results of numerical simulations, which indicate that modulated radio frequency fields may be used to achieve broadband spin locking of singlet states but only in the case of a small difference in Larmor frequencies between the members of the spin pair.
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Published date: June 2009
Organisations:
Chemistry
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Local EPrints ID: 146417
URI: http://eprints.soton.ac.uk/id/eprint/146417
ISSN: 0021-9606
PURE UUID: 681b067d-9a26-4e2d-bc48-98832281ae01
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Date deposited: 21 Apr 2010 13:04
Last modified: 14 Mar 2024 02:50
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