Abstract
Irradiation of cerium(IV) complex of octaethyl bisporphyrin Ce[OEΡ(-2]2 with visible light, in the presence of CCl4 as an electron acceptor, leads to their photooxidation and s. cation radical formation. The process was followed using electron absorption and magnetic circular dichroism spectroscopy. Electronic configuration in neutral monoand bisporphyrin (sandwich) complexes were compared to the one of the neutral species. Photoirradiation of sandwich octaethyland tetraphenyl bisporphyrins, in the presence of an electron donor (triethylamine) results in their photoreduction on different pathways. Formation of the [Ce(HI)(ΤΡΡ)(-2)ΤΡΡ(-2)]— and [Ce(III)(OEP) (-1)(OEP) (-2)] complexes was followed by absorption and electron spin resonance spectroscopy. PACS numbers: 82.50.Fv
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