Fast destruction of singlet order in NMR experiments

Fast destruction of singlet order in NMR experiments Full article

Journal

The Journal of Chemical Physics
ISSN: 0021-9606

Output data

Year: 2019, Volume: 151, Article number : 234203, Pages count : 8 DOI: 10.1063/1.5131730

Authors

Rodin Bogdan A. ^1,2 , Sheberstov Kirill F. ^1,3 , Kiryutin Alexey S. ^1,2 , Brown Lynda J. ⁴ , Brown Richard C.D. ⁴ , Sabba Mohamed ⁴ , Levitt Malcolm H. ⁴ , Yurkovskaya A.V. ^1,2 , Ivanov Konstantin L. ^1,2

Affiliations

1	International Tomography Center, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090, Russia
2	Novosibirsk State University, Novosibirsk 630090, Russia
3	Johannes Gutenberg-Universitat, Helmholtz Institute Mainz, Mainz 55099, Germany
4	Department of Chemistry, Southampton University, Southampton SO17 1BJ, United Kingdom

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.

Rodin B.A. , Sheberstov K.F. , Kiryutin A.S. , Brown L.J. , Brown R.C.D. , Sabba M. , Levitt M.H. , Yurkovskaya A.V. , Ivanov K.L.
Fast destruction of singlet order in NMR experiments
The Journal of Chemical Physics. 2019. V.151. 234203 :1-8. DOI: 10.1063/1.5131730

Submitted:	Oct 15, 2019
Accepted:	Nov 26, 2019
Published online:	Dec 17, 2019

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