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

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

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

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 13 C 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.

Original languageEnglish
Article number064201
Pages (from-to)064201
Number of pages11
JournalJournal of Chemical Physics
Volume150
Issue number6
DOIs
Publication statusPublished - 14 Feb 2019

Keywords

  • ORDER
  • POLARIZATION
  • SPECTROSCOPY
  • CONSTRAINTS
  • DIFFUSION
  • CONTRAST
  • MINUTES
  • FIELD

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