Micelles electron exchange

This may not be the full answer as the photoinduced electron exchange between pyrene, P, and dimethylaniline, D, on CTAB micelles and other CTAB structures, etc.,... 

Electron transfer can be accomplished by quenching of a micelle trapped chromophore by ions capable of ion pairing with the micelle surface. For example, excited N-methylphenothiazine in sodium dodecylsulfate (SDS) micelles can exchange electrons with Cu(II). The photogenerated Cu(I) is rapidly displaced by Cu(II) from the aqueous phase so that intramicellar recombination is averted, Fig. 5 (266). Similarly, the quantum yield for formation of the pyrene radical cation via electron transfer to Cu(II) increases with micellar complexation from 0.25 at 0.05 M SDS to 0.60 at 0.8 M SDS (267). The electron transfer quenching of triplet thionine by aniline is also accelerated in reverse micelles by this mechanism (268). 

The same physical interactions described above for micelle surfaces prove to be operative in vesicles, and depending on the arrangement of donors or acceptor among the four possible aggregates shown in Fig. 6, either accelerated electron exchange or stabilization of ion radical pairs can be observed (276). 

However, our concern is with the cationic surface which promotes a rapid exchange of an electron from dimethylaniline to pyrene, and thereafter maintains a long-lived ion which can react with further solutes added to the system. Hie concept of the experiment is, that dimethylaniline transfers the electron rapidly to pyrene via a diffusion controlled reaction, which occurs by movement of the reactants on the surface of the micelle until they encounter each other. Electron transfer then occurs, and the back reaction of the two ions is prevented by the surface of the micelle, which holds the reactants in an unsuitable configuration for back reaction to occur. However, the repulsive positive force of the micelle on the dimethylaniline cation rapidly drives it away from the micelle, and effective and efficient charge separation is achieved, with a quantum yield Q of unity for the process of charge separation. 

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