The preparation of large azaacenes is very important because of their great potential in organic electronics. In this report, we successfully synthesized and fully characterized two stable pyrene-fused large azaacenes: octaazadecacene and tetraazaoctacene through employing a relatively moderate aromatic unit pyrene as imbedded species in the backbone of azaacenes to ensure large conjugation and stability. The photoelectrochemical (PEC) studies indicate that both azaacenes display n-type semiconductor behavior.
Keywords: azaacenes; n-type semiconductors; octaazadecacene; organic electronics; photoelectrochemical behavior; tetraaazaoctacene.
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