Issue 37, 2022

Dipolar pathways in multi-spin and multi-dimensional dipolar EPR spectroscopy

Abstract

Dipolar electron paramagnetic resonance (EPR) experiments, such as double electron–electron resonance (DEER), measure distributions of nanometer-scale distances between unpaired electrons, which provide valuable information for structural characterization of proteins and other macromolecular systems. We present an extension to our previously published general model based on dipolar pathways valid for multi-dimensional dipolar EPR experiments with more than two spin-1/2 labels. We examine the 4-pulse DEER and TRIER experiments in terms of dipolar pathways and show experimental results confirming the theoretical predictions. This extension to the dipolar pathways model allows the analysis of previously challenging datasets and the extraction of multivariate distance distributions.

Graphical abstract: Dipolar pathways in multi-spin and multi-dimensional dipolar EPR spectroscopy

Supplementary files

Article information

Article type
Paper
Submitted
05 Jul 2022
Accepted
07 Sep 2022
First published
08 Sep 2022
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2022,24, 22645-22660

Dipolar pathways in multi-spin and multi-dimensional dipolar EPR spectroscopy

L. Fábregas-Ibáñez, V. Mertens, I. Ritsch, T. von Hagens, S. Stoll and G. Jeschke, Phys. Chem. Chem. Phys., 2022, 24, 22645 DOI: 10.1039/D2CP03048A

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