%0 Journal Article %J J. Photochem.Journal of Photochemistry %D 1985 %T Transformation of single-electron transfer photoproducts into multielectron charge relays: the functions of water-oil two-phase systems and enzyme catalysis. %A Willner, Itamar %A Goren, Zafrir %A Mandler, Daniel %A Maidan, Ruben %A Degani, Yinon. %K electron transfer oil water system %K microemulsion system photosynthesis model %K photosynthesis artificial system %X Water-in-oil microemulsions provide an organized environment that effectively controls photosensitized electron transfer processes. Effective charge sepn. and stabilization of the intermediate photoproducts against back electron transfer processes are achieved by means of hydrophobic and hydrophilic interactions of the photoproducts with the water-oil phases. Water-oil 2-phase systems also provide a means for induced disproportionation of a photogenerated 1-electron transfer product to the corresponding 2-electron charge relay. This induced disproportionation can be achieved by design of opposite soly. properties of the comproportionation products in the 2 phases. The 2-electron charge relay mediates the redn. of meso-1,2-dibromostilbene to trans-stilbene. An alternative route for generating multielectron charge relays involves the enzyme-catalyzed prodn. of NADPH using the 4,4'-bipyridinium radical cation as an electron carrier. NADPH is subsequently utilized in the redn. of 2-butanone to (-)-2-butanol in the presence of the enzyme alc. dehydrogenase. [on SciFinder(R)] %B J. Photochem.Journal of Photochemistry %V 28 %P 215 - 28 %8 1985/// %@ 0047-2670 %G eng %N 2