X-band EPR spectra (at 123 K) of the photolyzed solution
of complex 1 in acetonitrile–water (40:60 v/v)
solution (50 μM,
top) and MnSO4 + KBr mixture in acetonitrile–water
(40:60 v/v) solution (100 μM, bottom). Microwave frequency,
9.44 GHz; modulation amplitude, 2.00 G; and modulation frequency,
100 kHz.