Constant-adiabaticity RF-pulses for generating long-lived singlet spin states in NMR

Constant-adiabaticity RF-pulses for generating long-lived singlet spin states in NMR Full article

Journal

The Journal of Chemical Physics
ISSN: 0021-9606

Output data

Year: 2019, Volume: 150, Article number : 064201, Pages count : 11 DOI: 10.1063/1.5079436

Authors

Rodin Bogdan A. ^1,2 , Sheberstov Kirill F. ^1,3 , Kiryutin Alexey S. ^1,2 , Hill-Cousins Joseph T. ⁴ , Brown Lynda J. ⁴ , Brown Richard C.D. ⁴ , Jamain Baptiste ⁵ , Zimmermann Herbert ⁶ , Sagdeev Renad Z. ^1,2,7 , Yurkovskaya Alexandra 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	State Scientific Center of the Russian Federation “State Research Institute for Chemistry and Technology of Organoelement Compounds” (SSC RF GNIIChTEOS), Moscow 111123, Russia
4	School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
5	INSA Toulouse, Département de Physique, Université de Toulouse, 31077 Toulouse Cedex 4, France
6	Department of Biomolecular Mechanisms, Max-Planck-Institut für Medizinische Forschung, Heidelberg 69028, Germany
7	Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Science, Moscow 119991, Russia

A method is implemented to perform “fast” adiabatic variation of the spin Hamiltonian by imposing the constant adiabaticity condition. The method is applied to improve the performance of singlet-state Nuclear Magnetic Resonance (NMR) experiments, specifically, for efficient generation and readout of the singlet spin order in coupled spin pairs by applying adiabatically ramped RF-fields. Test experiments have been performed on a specially designed molecule having two strongly coupled 13C spins and on selectively isotopically labelled glycerol having two pairs of coupled protons. Optimized RF-ramps show improved performance in comparison, for example, to linear ramps. We expect that the methods described here are useful not only for singlet-state NMR experiments but also for other experiments in magnetic resonance, which utilize adiabatic variation of the spin Hamiltonian.

Rodin B.A. , Sheberstov K.F. , Kiryutin A.S. , Hill-Cousins J.T. , Brown L.J. , Brown R.C.D. , Jamain B. , Zimmermann H. , Sagdeev R.Z. , Yurkovskaya A.V. , Ivanov K.L.
Constant-adiabaticity RF-pulses for generating long-lived singlet spin states in NMR
The Journal of Chemical Physics. 2019. V.150. 064201 :1-11. DOI: 10.1063/1.5079436

Submitted:	Oct 30, 2018
Accepted:	Jan 14, 2019
Published online:	Feb 11, 2019

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