Preprints
https://doi.org/10.5194/mr-2021-31
https://doi.org/10.5194/mr-2021-31

  29 Mar 2021

29 Mar 2021

Review status: this preprint is currently under review for the journal MR.

Heteronuclear and Homonuclear Radio Frequency Driven Recoupling

Evgeny Nimerovsky, Kai Xue, Kumar Tekwani Movellan, and Loren B. Andreas Evgeny Nimerovsky et al.
  • Department of NMR based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, Germany

Abstract. The Radio Frequency Driven Recoupling (RFDR) pulse sequence is used in magic-angle spinning (MAS) NMR to recouple homonuclear dipolar interactions. Here we show simultaneous recoupling of both the heteronuclear and homonuclear dipolar interactions by applying RFDR pulses on two channels. We demonstrate the method, called HETeronuclear RFDR (HET-RFDR) on microcrystalline SH3 samples at 10 kHz and 55.555 kHz MAS. Numerical simulations of both HET-RFDR and standard RFDR sequences allow better understanding of the influence of offsets, paths of magnetization transfers for both HET-RFDR and RFDR experiments as well as the crucial role of XY phase cycling.

Evgeny Nimerovsky et al.

Status: open (until 26 Apr 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Review Report', Anonymous Referee #1, 09 Apr 2021 reply

Evgeny Nimerovsky et al.

Evgeny Nimerovsky et al.

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Short summary
The RFDR sequence has been widely used for homonuclear recoupling. The article describes a heteronuclear version of RFDR. HET-RFDR sequence transfers longitudinal polarization between heteronuclear pairs by applying RFDR on two channels simultaneously. We perform an operator analysis of HET-RFDR and RFDR sequences. Such analysis allows better understanding of the influence of offsets, paths of magnetization transfers for both these experiments, as well as the crucial role of XY phase cycling.