| Abstract
| - The preparation, isolation, and characterization of several new peripherally functionalizedmonomeric porphyrins and metalloporphyrins and of porphyrin dimers are described. These dimers areobtained by linking with metal ions two monomeric porphyrins bearing at their periphery an enaminoketonechelate fully conjugated with the aromatic ring. Porphyrin dimers linked by metal ions display largeinteractions in the ground state as evidenced by their electronic spectra and their electrochemical behavior.Compared to the monomeric analogue, these dimers show absorption spectra with intensified red-shiftedQ-bands and their first oxidation potentials are substantially lowered and split into two distinct redox steps.
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