Quasi-planar diazadithio and diazodiseleno[8]circulenes: synthesis, structures and properties

Diazadithio and diazadiseleno[8]circulenes were synthesized in good yields through a non-pyrolytic cyclization starting from nitrogen-bridged tetraphenylene. Their structures were unambiguously confirmed by X-ray crystallographic analyses. Photophysical, electrochemical and computational investigations of these [8]circulenes suggested their potential applications in inorganic materials.