Benzoporphyrins have been investigated for use in a variety of applications such as dye-sensitized solar cells, photodynamic therapy and organic electronic materials¹. A₂B₂ type porphyrins are known to exhibit non-linear optical properties². However, there are no reports in literature of tetrabenzofused A₂B₂ porphyrin systems.

In this work we have synthesized novel A₂B₂ tetrabenzoporphyrins with electron donors on one axis and electron acceptors on the other axis. We also synthesized the corresponding A₂ dibenzoporphyrins for comparison of the optical and electronic properties with the A₂B₂  tetrabenzoporphyrins.

(1)    Myśliwiec, D.; Donnio, B.; Chmielewski, P. J.; Heinrich, B.; Stępień, M. Journal of the American Chemical Society 2012, 134, 4822.

(2)    Nowak-Król, A.; Wilson, C. J.; Drobizhev, M.; Kondratuk, D. V.; Rebane, A.; Anderson, H. L.; Gryko, D. T.  ChemPhysChem 2012, 13, 3966.

(3)    (2)  Senge, M. O.; Fazekas, M.; Pintea, M.; Zawadzka, M.; Blau, W. J. European Journal of Organic      Chemistry    2011, 2011, 5797.