Electron donor-acceptor complexes photoreactions

Udal tsov, A.V. (1997) Characterisitcs of donor-acceptor complexes formed in porphyrin-polymer systems and their photoactivation in electron transfer photoreaction, J. Photochem. Photobiol. B Biol., 37, 31-39. 

Since the fate of the redox pair must be back electron-transfer (in the absence of a diversionary reaction), interest centers on chemical reactions fast enough to obviate the back electron transfer process in Scheme V. Clearly, instability in the reduced acceptor or oxidized donor can promote efficient photoreaction. For example, oxidized alkylmetal donors are unstable, and the charge-transfer photolysis of R4M (M = Sn and Pb) in molecular complexes with TCNE is a convenient source of alkyl radicals [206] ... 

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