A Straightforward Strategy toward Large BN-Embedded π‑Systems: Synthesis, Structure, and Optoelectronic Properties of Extended BN Heterosuperbenzenes

A straightforward
strategy has been used to construct large BN-embedded
π-systems simply from azaacenes. BN heterosuperbenzene derivatives,
the largest BN heteroaromatics to date, have been synthesized in three
steps. The molecules exhibit curved π-surfaces, showing two
different conformations which are self-organized into a sandwich structure
and further packed into a π-stacking column. The assembled microribbons
exhibit good charge transport properties and photoconductivity, representing
an important step toward the optoelectronic applications of BN-embedded
aromatics.