Magnetic Resonance
Magnetic Resonance
MR
Articles | Volume 1, issue 1
Articles | Volume 1, issue 1
https://doi.org/10.5194/mr-1-75-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/mr-1-75-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 1, issue 1
Research article
 | 
15 May 2020
Research article |  | 15 May 2020

Distance measurement between trityl radicals by pulse dressed electron paramagnetic resonance with phase modulation

Nino Wili, Henrik Hintz, Agathe Vanas, Adelheid Godt, and Gunnar Jeschke

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Field: EPR | Topic: Pulse-sequence development
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Cited articles

Anders, J. and Lips, K.: MR to go, J. Magn. Reson., 306, 118–123, https://doi.org/10.1016/j.jmr.2019.07.007, 2019. a
Blank, A.: A new approach to distance measurements between two spin labels in the >10 nm range, Phys. Chem. Chem. Phys., 19, 5222–5229, https://doi.org/10.1039/C6CP07597E, 2017. a
Blank, A., Twig, Y., and Ishay, Y.: Recent trends in high spin sensitivity magnetic resonance, J. Magn. Reson., 280, 20–29, https://doi.org/10.1016/j.jmr.2017.02.019, 2017. a
Borbat, P. P. and Freed, J. H.: Multiple-quantum ESR and distance measurements, Chem. Phys. Lett., 313, 145–154, https://doi.org/10.1016/S0009-2614(99)00972-0, 1999. a
Borbat, P. P., Georgieva, E. R., and Freed, J. H.: Improved sensitivity for long-distance measurements in biomolecules: Five-pulse double electron-electron resonance, J. Phys. Chem. Lett., 4, 170–175, https://doi.org/10.1021/jz301788n, 2013. a
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Short summary
Measuring distances between unpaired electron spins is an important application of electron paramagnetic resonance. The longest distance that is accessible is limited by the phase memory time of the electron spins. Here we show that strong continuous microwave irradiation can significantly slow down relaxation. Additionally, we introduce a phase-modulation scheme that allows measurement of the distance during the irradiation. Our approach could thus significantly extend the accessible distances.
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