Fusion and planarization of a quinoidal porphyrin dimer

Abstract

The crystal structure, near-infrared spectrum and electrochemistry of a quinoidal triply-linked porphyrin dimer are compared with those of its singly-linked precursor; fusing the two porphyrins planarizes the π-system and reduces the optical HOMO–LUMO gap while increasing the gap between the first oxidation and reduction potentials.