Abstract
Multiple photon-gated spectral hole burning and photoproducts were observed in two systems: zinc-tetrabenzoporphyrin/crotonic acid/phenoxy resin film and zinc-tetraphenyl-benzoporphyrin+zinc-tetraphenyl(4-phenyl-acetylamino)benzotribenzoporphyrin/phydroxybenzaldehyde/poly(methyl)metacrylate film. The hole burning sequence, whether burned successively from the shorter wavelength side to the longer side or the opposite, and the selection of suitable intensities of burning and gating laser were proved to be important in high quality multiple hole formation. Their photoproducts after hole burning are cation radicals of their corresponding electron donors. The photon-gated spectral hole burning processes are determined to be donor-acceptor electron-transfer reactions.
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