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Accessing long-lived nuclear spin order by isotope-induced symmetry breaking

Accessing long-lived nuclear spin order by isotope-induced symmetry breaking
Accessing long-lived nuclear spin order by isotope-induced symmetry breaking
Nuclear singlet states are nonmagnetic states of nuclear spin-1/2 pairs that may exhibit lifetimes much slower than the relaxation of the component spins in isolation. This feature makes them attractive vehicles for conveying nuclear hyperpolarization in NMR spectroscopy and magnetic resonance imaging experiments and for reducing signal losses in other NMR experiments caused by undesirably fast nuclear spin relaxation. Here we show access to 13C2 singlet states in a symmetrical oxalate molecule by substituting one or more 16O nuclei by the stable nonmagnetic isotope 18O. The singlet relaxation time of the 13C2 pair in [1-18O,13C2]-oxalate is 2–3 times longer than the spin–lattice relaxation time T1
0002-7863
2120-2123
Tayler, Michael C. D.
c3bf3088-5399-47ab-8d55-32231f546920
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Tayler, Michael C. D.
c3bf3088-5399-47ab-8d55-32231f546920
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3

Tayler, Michael C. D. and Levitt, Malcolm H. (2013) Accessing long-lived nuclear spin order by isotope-induced symmetry breaking. Journal of the American Chemical Society, 135 (6), 2120-2123. (doi:10.1021/ja312227h).

Record type: Article

Abstract

Nuclear singlet states are nonmagnetic states of nuclear spin-1/2 pairs that may exhibit lifetimes much slower than the relaxation of the component spins in isolation. This feature makes them attractive vehicles for conveying nuclear hyperpolarization in NMR spectroscopy and magnetic resonance imaging experiments and for reducing signal losses in other NMR experiments caused by undesirably fast nuclear spin relaxation. Here we show access to 13C2 singlet states in a symmetrical oxalate molecule by substituting one or more 16O nuclei by the stable nonmagnetic isotope 18O. The singlet relaxation time of the 13C2 pair in [1-18O,13C2]-oxalate is 2–3 times longer than the spin–lattice relaxation time T1

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Published date: 2013
Organisations: Magnetic Resonance

Identifiers

Local EPrints ID: 356260
URI: https://eprints.soton.ac.uk/id/eprint/356260
ISSN: 0002-7863
PURE UUID: 4b392080-7ce7-4d74-9981-9205bee54c15
ORCID for Malcolm H. Levitt: ORCID iD orcid.org/0000-0001-9878-1180

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Date deposited: 06 Sep 2013 08:19
Last modified: 15 Aug 2019 00:48

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Author: Michael C. D. Tayler

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