Abstract: The concept of heteronuclear Long-Lived spin States (LLSs) is introduced. In the simplest case of a pair of heteronuclei, such states are given by the singlet order of the spin pair, which can be efficiently sustained under Zero or Ultra-Low Field (ZULF) conditions. Here we describe two possible ways of detecting long-lived singlet order of heteronuclei: detection at ZULF conditions and NMR (Nuclear Magnetic Resonance) detection at high field utilising fast field-cycling. A theoretical description of the underlying spin dynamics is presented for both cases; the discussion is supported by experimental examples of LLSs in 13CH groups. The generality of these phenomena is discussed, as well as their potential applications.

Cite: Kiryutin A.S. , Zhukov I.V. , Yurkovskaya A.V. , Budker D. , Ivanov K.L.
Chapter 23: Singlet Order in Heteronuclear Spin Systems
Monography chapter New Developments in NMR No. 22 Long-lived Nuclear Spin Order: Theory and Applications. – The Royal Society of Chemistry., 2020. – C.418-433. – ISBN 978-1-78801-568-4. DOI: 10.1039/9781788019972-00418 OpenAlex

Dates:

Published online:	Apr 7, 2020
Published print:	Apr 15, 2020

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OpenAlex:

W3015615085

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