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. Author manuscript; available in PMC: 2019 Oct 7.
Published in final edited form as: Phys Chem Chem Phys. 2018 Sep 13;20(37):23976–23987. doi: 10.1039/c8cp04167a

Figure 4.

Figure 4.

(a) ELDOR spectrum of 4-amino TEMPO (4AT) and AMUPOL at a detection frequency of 193.52 GHz (or −390 MHz, offset), and at 25 K. Peak labels are as follows: (*1) where the detection frequency equals the saturation frequency, (*2) Hyperfine coupling to the 1H spin in system, (i.e. 1H solid effect), (*3) hyperfine coupling to 2H and 14N, and (*4) broad peak at center of the EPR line due to spectral diffusion between irradiated and detected electron spins. (b) Correlation of Depolarization factor, 1/єdepo, measured (at 5 KHz) vs. ΛeSD of all radicals measured at static condition in an ELDOR experiment depicted in figure 4 (a).