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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
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.

0021-9606
214501
Pileio, Giuseppe
13f78e66-0707-4438-b9c9-6dbd3eb7d4e8
Levitt, Malcolm
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
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. The Journal of Chemical Physics, 130 (21), 214501. (doi:10.1063/1.3139064).

Record type: Article

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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More information

Published date: June 2009
Organisations: Chemistry

Identifiers

Local EPrints ID: 146417
URI: http://eprints.soton.ac.uk/id/eprint/146417
ISSN: 0021-9606
PURE UUID: 681b067d-9a26-4e2d-bc48-98832281ae01
ORCID for Giuseppe Pileio: ORCID iD orcid.org/0000-0001-9223-3896
ORCID for Malcolm Levitt: ORCID iD orcid.org/0000-0001-9878-1180

Catalogue record

Date deposited: 21 Apr 2010 13:04
Last modified: 17 Dec 2019 01:52

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