Abstract
Abstract[Ni(cod)2]‐mediated intramolecular reductive coupling of β–β′ linked meso,meso′‐dibromosubporphyrin dimer gave the anti‐isomer of meso–meso′, β–β′ doubly linked subporphyrin dimer as the first example of a fused subporphyrin dimer. The fused dimer 3anti displays an wavelike coplanar structure, a perturbed and red‐shifted absorption spectrum, reversible redox behaviors with a decreased electrochemical HOMO–LUMO band gap, and a short S1‐state lifetime owing to the delocalized π‐electronic network.
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