Abstract

AbstractIn order to increase the driving force for photoinduced electron‐transfer reactions of porphyrin‐quinone cyclophanes, the zinc complexes 3a‐e and 4a‐e were prepared from the corresponding cyclophanes of the 1 and 2 series. Electron‐transfer‐related properties like redox potentials and fluorescence spectra were determined for 3a‐e and 4a‐e. The X‐ray structure analysis of 4a indicates that for the very fast and solvent‐independent electron transfer in these systems a specific mechanism involving an interaction of a quinone carbonyl group with the zinc might be considered as an alternative to through‐space electron‐transfer.

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