“…This type of packing is also in line with previously reported spectroscopic studies on thin films of a similar azatriphenylene-based compound, i.e., hexakis(hexylthio)diquinoxalino[2,3-a:2′,3′-c]phenazine, adsorbed on HOPG. [34] Even though a slight tilting of the molecules during growth cannot be excluded from consideration, a structural transition of the Stransky-Krastanov type within the film, such that the molecules of the undermost layers are oriented parallel to the substrate surface whereas the outermost layers have a different azimuthal order, can be ruled out. As a matter of fact an overlayer was observed on films of similar thickness prepared from dichlorobenzene solutions; SFM phase imaging for such samples revealed a multilayer formation characterized by a different molecular packing during the growth (image not shown).…”