Electrochemistry of hypericin incorporated into a cationic lipid film on agraphite electrode in an aqueous medium

Quasi-reversible two-consecutive one-electron reduction processes of hyperi cin (Hyp) in an aqueous medium were achieved by incorporating Hyp into a ca st film of a synthetic cationic lipid, dioctadecyldimethylammonium bromide (2C(18)N(+)Br(-)), coated on a basal-plane pyrolytic graphite (BPG) electro de. Importance of the electrostatic interaction between Hyp anions and the cationic sites in the matrix was suggested.