Azepine-Embedded Seco-Hexabenzocoronene-Based Helix Nanographenes: Access to Modification of the Core by N-H Functionalization.

Contorted polycyclic aromatic hydrocarbons (PAHs) or nanographenes (NGs) have received increasing attention and are mostly prepared by "bottom-up" strategies. Apparently, systematically tuning the properties of NGs for application is important but challenging. Here, a new type of helix, azepine-embedded NGs, were designed and synthesized by the introduction of NH into the hexa-