A meso–meso β‐β β‐β Triply Linked Subporphyrin Dimer. (23rd August 2017) - Okuda, Yasuhiro
Abstract: A meso–meso β‐β β‐β triply linked subporphyrin dimer6 was synthesized by stepwise reductive elimination of β‐to‐β doubly Pt II ‐bridged subporphyrin dimer9 . Dimer6 was characterized by spectroscopic and electrochemical measurements, theoretical calculations, and picosecond time‐resolved transient absorption spectroscopy. X‐ray diffraction analysis reveals that6 has a bowl‐shaped structure with a positive Gaussian curvature. Despite the curved structure, 6 exhibits a remarkably red‐shifted absorption band at 942 nm and a small electrochemical HOMO–LUMO gap (1.35 eV), indicating an effectively conjugated π‐electronic network.