title: Syntheses and optical and electrochemical properties of porphyrin dimers linked by metal ions.
abstract: The preparation, isolation, and characterization of several new peripherally functionalized monomeric porphyrins and metalloporphyrins and of porphyrin dimers are described. These dimers are obtained by linking with metal ions two monomeric porphyrins bearing at their periphery an enaminoketone chelate fully conjugated with the aromatic ring. Porphyrin dimers 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 dimers show absorption spectra with intensified red-shifted Q-bands and their first oxidation potentials are substantially lowered and split into two distinct redox steps.
authors.affiliation: Laboratoire de Chimie des Porphyrines, UMR 7123 CNRS, Faculté de Chimie, Université Louis Pasteur, 1 rue Blaise Pascal, 67000 Strasbourg, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Richeter
authors.forename: Christophe
authors.initials: C
authors.lastname: Jeandon
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Gisselbrecht
authors.forename: Romain
authors.initials: R
authors.lastname: Ruppert
authors.forename: Henry J
authors.initials: HJ
authors.lastname: Callot
mesh_terms: D000586:Amination; D002412:Cations / Q000737:chemistry; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D007659:Ketones / Q000737:chemistry; D008665:Metalloporphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D010084:Oxidation-Reduction; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002412:Cations; D007659:Ketones; D008665:Metalloporphyrins; D008670:Metals