Vesicle surfaces, electron transfer charged

Bilayer membranes and vesicles provide not only charged surfaces but also two phases, separating the reaction sites and products. It was first demonstrated that photoinduced electron transfer occurs from EDTA in the inner water phase of vesicles incorporated with surfactant Ru(bpy)2+ to MV2+ in the outer water phase22 (Eq. (14)). 

Charge Separation Potential. An electron can be transferred across the bllayer of surfactant vesicles from a donor to an acceptor. This transfer renders the donor side of the vesicle surface to be more positive than the acceptor side, thus it creates a potential, referred to as charge separation potential, i c.s ... 

Influence of Field Effect. Since electron transfer rates are directly related to the field, a judicious manipulation of the distance of a sensitizer and an electron acceptor (or donor) from a highly charged surface across the Stem layer (Figure 2, equation 7) is expected to result in altered efficiencies. This expectation has been realized In achieving effective charge separation under the Influence of a positive electric field, generated by DODAC vesicles (35). Rate constant for electron transfer from L-cystelne to the excited state of Ru(bpy) ... 

Figure 23 ZnSe particles on the surface of DHP vesicles lead to charge separation [(ZnSe(e +h )] upon irradiation [85]. ZnSe(e ) reacts with methylviologen (MV ) to give MV . Glucose (RCH2OH) depletes the holes (h ) by electron transfer and is oxidized, while the electrode reconverts MV" " to...

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