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Fast destruction of singlet order in NMR experiments

Fast destruction of singlet order in NMR experiments
Fast destruction of singlet order in NMR experiments
Some nuclear spin systems support long-lived states, which display greatly extended relaxation times relative to the relaxation time of nuclear spin magnetization. In spin-1/2 pairs, such a long-lived state is given by singlet order, representing the difference of the population of the nuclear singlet state and the mean population of the three triplets. In many cases, the experiments with long-lived singlet order are very time-consuming because of the need to wait for singlet order decay before the experiment can be repeated; otherwise, spin order remaining from a previous measurement may lead to experimental artifacts. Here, we propose techniques for fast and efficient singlet order destruction. These methods exploit coherent singlet-triplet conversion; in some cases, multiple conversion steps are introduced. We demonstrate that singlet order destruction enables a dramatic reduction of the waiting time between consecutive experiments and suggest to use this approach in singlet-state Nuclear Magnetic Resonance (NMR) experiments with nearly equivalent spins.
0021-9606
Rodin, Bogdan A.
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Sheberstov, Kirill F.
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Kiryutin, Alexey S.
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Brown, Lynda J.
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Brown, Richard C.D.
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Sabba, Mohamed
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Levitt, Malcolm H.
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Yurkovskaya, Alexandra V.
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Ivanov, Konstantin L.
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Rodin, Bogdan A.
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Sheberstov, Kirill F.
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Kiryutin, Alexey S.
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Brown, Lynda J.
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Brown, Richard C.D.
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Sabba, Mohamed
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Levitt, Malcolm H.
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Yurkovskaya, Alexandra V.
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Ivanov, Konstantin L.
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Rodin, Bogdan A., Sheberstov, Kirill F., Kiryutin, Alexey S., Brown, Lynda J., Brown, Richard C.D., Sabba, Mohamed, Levitt, Malcolm H., Yurkovskaya, Alexandra V. and Ivanov, Konstantin L. (2019) Fast destruction of singlet order in NMR experiments. The Journal of Chemical Physics, 151 (23), [234203]. (doi:10.1063/1.5131730).

Record type: Article

Abstract

Some nuclear spin systems support long-lived states, which display greatly extended relaxation times relative to the relaxation time of nuclear spin magnetization. In spin-1/2 pairs, such a long-lived state is given by singlet order, representing the difference of the population of the nuclear singlet state and the mean population of the three triplets. In many cases, the experiments with long-lived singlet order are very time-consuming because of the need to wait for singlet order decay before the experiment can be repeated; otherwise, spin order remaining from a previous measurement may lead to experimental artifacts. Here, we propose techniques for fast and efficient singlet order destruction. These methods exploit coherent singlet-triplet conversion; in some cases, multiple conversion steps are introduced. We demonstrate that singlet order destruction enables a dramatic reduction of the waiting time between consecutive experiments and suggest to use this approach in singlet-state Nuclear Magnetic Resonance (NMR) experiments with nearly equivalent spins.

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JCP19-AR-SPIN2019-04161 - Accepted Manuscript
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Accepted/In Press date: 26 November 2019
e-pub ahead of print date: 17 December 2019

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Local EPrints ID: 436760
URI: http://eprints.soton.ac.uk/id/eprint/436760
ISSN: 0021-9606
PURE UUID: 427eee0c-2c22-47c0-b00c-13cb7adf45dc
ORCID for Lynda J. Brown: ORCID iD orcid.org/0000-0002-5678-0814
ORCID for Richard C.D. Brown: ORCID iD orcid.org/0000-0003-0156-7087
ORCID for Malcolm H. Levitt: ORCID iD orcid.org/0000-0001-9878-1180

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Date deposited: 03 Jan 2020 17:30
Last modified: 18 Feb 2021 16:56

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Contributors

Author: Bogdan A. Rodin
Author: Kirill F. Sheberstov
Author: Alexey S. Kiryutin
Author: Lynda J. Brown ORCID iD
Author: Mohamed Sabba
Author: Alexandra V. Yurkovskaya
Author: Konstantin L. Ivanov

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