(Invited) Π-Extended Porphyrins: Fusion of Polycyclic Aromatic Hydrocarbons to Porphyrins

Largely π-extended structures represent one most fascinating yet very challenging frontiers in chemistry and materials science. 1, 2 Incorporating both porphyrins and polycyclic aromatic hydrocarbons to obtain largely π-extended multichromophoric systems is especially attractive as the resulted largely π-extended systems are reminiscent of “nanographenes” doped with heteroatoms. 3, 4 Due to limited availability of synthetic methods, only the simplest symmetrical π-extended porphyrins remain largely unexplored. The Wang group has been engaged in developing concise and versatile synthetic and functionalization methods for π-extended porphyrins. The availability of these methods offers easy access to many p -extended porphyrins with novel functionalities. 5-7 In this talk, the synthesis, characterization, and the optical and photophysical properties of π-extended porphyrins fused with 5- and 6-membered rings including pentacene-, pentaquinone-, acenaphtho[1,2-b]pentacene- and 12H-benzo[f]benzo[4,5]imidazo[2,1-a]isoindole-fused porphyrins will be presented. Figure 1