Functionalized Pi-Extended Porphyrins

Pi-extended porphyrins have remained a long-lasting research interest in scientific fields due to their unique set of photophysical and optoelectronic properties as well as their potential broad application in various areas ranging from biomedicine to organic electronics. However, due to the limited synthetic methods, particularly the lack of functionalization methods, only a small number of pi-extended porphyrins have been studied in the past decades. In order to make breakthrough in the synthesis of pi-extended porphyrins, our group has developed concise and versatile methods, the availability of which opens the door to access a large number of functionalized pi-extended porphyrins. In this presentation, we report the synthesis and characterization of three new classes of pi-extended porphyrins, including push-pull dibenzoporphyrins, A₂B₂ push-pull tetrabenzoporphyrins, and acene-fused porphyrins oligomers. The electronic and optical properties of these p-extended porphyrins were measured using UV-Vis spectroscopy, steady state fluorescence spectroscopy, and cyclic voltammetry. DFT calculations were also performed for these porphyrins.