Adding Four Extra K-Regions to Hexa-peri-hexabenzocoronene
Dumslaff, Tim × Yang, Bohan Maghsoumi, Ali Velpula, GM Mali, Kunal S Castiglioni, Chiara De Feyter, Steven Tommasini, Matteo Narita, Akimitsu Feng, Xinliang Muellen, Klaus #
American Chemical Society
Journal of the American Chemical Society vol:138 issue:14 pages:4726-4729
A multistep synthesis of hexa-perihexabenzocoronene (HBC) with four additional K-regions was developed through a precursor based on two benzotetraphene units bridged with p-phenylene, featuring preinstalled zigzag moieties. Characterization by laser desorption/ ionization time-of-flight mass spectrometry, Raman and IR spectroscopy, and scanning tunneling microscopy unambiguously validated the successful formation of this novel zigzag edge-rich HBC derivative. STM imaging of its monolayers revealed large-area, defect-free adlayers. The optical properties of the modified HBC were investigated by UV/visible absorption spectroscopy.