Abstract: Photoinduced oxygen transfer from acriditae N-oxide to cyclohexene in the presence of catalytic amount of phthalocyanine iron(Ⅱ) giving cyclohexene epoxide as the main product can be considered to be one of the mechanisticc model systems of biological oxidation catalyzed by monooxygenase Cytochrome P-450. A new absorption peak at 710 nm indicating the formation of a complex between phthalocyanine iron (Ⅱ) with acridine N-oxide. The complex posseses oxidizing reactivity and is believed to be the active intermediate in the oxygen transfer reaction. The effect of substituent in acridine N-oxide on product distribution and the mechanism of photoinduced oxygen transfer from acridine N-oxide catalyzed by phthalocyanine iron (Ⅱ) are briefly discussed.

Key words: Cytochrome P-450, phthalocyanine iron, aridine N-oxide photoinduced oxygen transfer