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. 2021 Feb 9;22(4):1739. doi: 10.3390/ijms22041739

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Q-band (ν = 33.67 GHz) EPR field swept echo detected spectrum (EDFS) recorded at 298 K for the HGAm sample (left panel, up) and the corresponding pseudo field modulation spectrum calculated (left panel down) are reported and compared with the corresponding ones obtained for the GAm pigment (right panel) (ν = 33.67 GHz). Rectangular pulses were used for the Hahn echo sequence π-τ-π/2, with pulse lengths π = 76 ns and π/2 = 38 ns. The g matrix values for the radical species are reported.