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Syntheses and optical and electrochemical properties of porphyrin dimers linked by metal ions

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 124, Issue 21, Pages 6168-6179

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ja017531n

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The preparation, isolation, and characterization of several new peripherally functionalized monomeric porphyrins and metalloporphyrins and of porphyrin dinners are described. These dinners are obtained by linking with metal ions two monomeric porphyrins bearing at their periphery an enaminoketone chelate fully conjugated with the aromatic ring. Porphyrin dinners linked by metal ions display large interactions in the ground state as evidenced by their electronic spectra and their electrochemical behavior. Compared to the monomeric analogue, these dinners show absorption spectra with intensified red-shifted Q-bands and their first oxidation potentials are substantially lowered and split into two distinct redox steps.

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