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A Directly Fused Subporphyrin Dimer with a Wavelike Structure
Yasuhiro Okuda1, Eiji Tsurumaki1, Juwon Oh2
1Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8262, Japan.
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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