CW-EPR spectra were collected at X-band (~9.34 GHz) with a Bruker EMX spectrometer equipped with an ER041xG microwave bridge and an ER4119-HS cavity at the Ohio Advanced EPR Laboratory at Miami University. Each spectrum was acquired by signal-averaging 10 scans with 3315 G central field, sweep width 150 G, 42 s field sweep, 100 kHz modulation frequency, 1 G modulation amplitude, and 10 mW microwave power.37 (link) Each experiment was repeated at least three times at room temperature.