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

Rodin, Bogdan A.; Sheberstov, Kirill F.; Kiryutin, Alexey S.; Hill-Cousins, Joseph T.; Brown, Lynda J.; Brown, Richard C. D.; Jamain, Baptiste; Zimmermann, Herbert; Sagdeev, Renad Z.; Yurkovskaya, Alexandra V.; Ivanov, Konstantin L.

doi:10.1063/1.5079436

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

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Zimmermann, Herbert
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Rodin, B. A., Sheberstov, K. F., Kiryutin, A. S., Hill-Cousins, J. T., Brown, L. J., Brown, R. C. D., et al. (2019). Constant-adiabaticity radiofrequency pulses for generating long-lived singlet spin states in NMR. The Journal of Chemical Physics, 150(6): 064201, pp. 1-12. doi:10.1063/1.5079436.

Cite as: https://hdl.handle.net/21.11116/0000-0002-FA7E-8

Abstract

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 C-13 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.