Preprints
https://doi.org/10.5194/mr-2023-2
https://doi.org/10.5194/mr-2023-2
06 Mar 2023
 | 06 Mar 2023
Status: this preprint is currently under review for the journal MR.

The solid-state DNP effect in liquids

Deniz Sezer

Abstract. The solid-state effect of dynamic nuclear polarization (DNP) is operative also in viscous liquids where the dipolar interaction between the electronic and nuclear spins is partially averaged. The proper way to quantify the degree of averaging, and thus calculate the efficiency of the effect, should be based on the time-correlation function of the dipolar interaction. Here we develop a general theoretical description which can take different dipolar correlations functions depending on the assumed motional model. At high magnetic fields, the theory predicts DNP enhancements at small offsets, far from the classical solid-effect positions that are displaced by one nuclear Larmor frequency from the electronic resonance. The predictions are in quantitative agreement with such enhancement peaks observed at 9.4 T [Kuzhelev et al. JACS, 144, 1164 (2022)]. These non-canonical peaks are not due to thermal mixing or the cross effect but exactly follow the dispersive component of the EPR line.

Deniz Sezer

Status: open (until 08 Apr 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on mr-2023-2', Gunnar Jeschke, 19 Mar 2023 reply
  • RC2: 'Comment on mr-2023-2', Anonymous Referee #2, 23 Mar 2023 reply

Deniz Sezer

Deniz Sezer

Viewed

Total article views: 226 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
159 58 9 226 1 1
  • HTML: 159
  • PDF: 58
  • XML: 9
  • Total: 226
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 06 Mar 2023)
Cumulative views and downloads (calculated since 06 Mar 2023)

Viewed (geographical distribution)

Total article views: 221 (including HTML, PDF, and XML) Thereof 221 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 29 Mar 2023
Download
Short summary
We show that the field profile of the solid effect in liquids is rich in dynamical information, including about time scales of molecular diffusion. We develop a general theoretical framework for extracting this information through quantitative fits to the experimental data. Unusual peaks in the enhancement field profile, which resemble thermal mixing but are not related to it, are demonstrated to arise in liquids under some conditions. These additionally restrict the dynamical parameters.