Fig. 6. X-band EPR spectra of anaerobic 400 μM solutions of (A) CuCLT and (B) CuQLT in methanol, recorded in the absence (black lines) and after the addition (red lines) of 100 equiv. of (A) Angeli's salt and (B) l-cysteine, respectively. The solutions were removed from the glove box and frozen 5 and 15 min after the addition of the analytes, respectively. Collection parameters: temperature, 77 K; modulation amplitude, 20 G; microwave power, 0.02 mW at 9.16 GHz.
