title: Measurement of formal potentials for hypericin in dimethylsulfoxide.
abstract: 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.
authors.affiliation: Department of Chemistry, University of Nebraska, Lincoln 68588-0304.
authors.forename: J
authors.initials: J
authors.lastname: Redepenning
authors.forename: N
authors.initials: N
authors.lastname: Tao
mesh_terms: D000873:Anthracenes; D004121:Dimethyl Sulfoxide; D010084:Oxidation-Reduction; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D011199:Potentiometry; D011838:Radiation-Sensitizing Agents / Q000737:chemistry*
chemical_list: D000873:Anthracenes; D011838:Radiation-Sensitizing Agents; D010569:Perylene; C004965:hypericin; D004121:Dimethyl Sulfoxide