Redepenning J, Tao N
Department of Chemistry, University of Nebraska, Lincoln 68588-0304.
Photochem Photobiol. 1993 Oct;58(4):532-5. doi: 10.1111/j.1751-1097.1993.tb04927.x.
The formal potentials for hypericin are measured in dimethylsulfoxide using cyclic voltammetry. Two reversible one-electron reductions and a more poorly defined multielectron oxidation are observed. The formal potentials for these processes are consistent with the visible spectrum of hypericin and they indicated that hypericin is both a good oxidizing agent and a good reducing agent in the excited state.
