Z-shaped polycyclic aromatic hydrocarbons with embedded five-membered rings and their application in organic thin-film transistors

Z-shaped polycyclic hydrocarbons with embedded five-membered rings as well as their diaza-analogues have been synthesized. Soluble congeners were obtained by the introduction of mesityl substituents and studied by cyclo- as well as differential pulse voltammetry revealing an amphoteric redox behavior. Unsubstituted congeners showed close π-stacking in single crystal X-ray diffraction analyses and thus promising characteristics for the application as semiconducting materials in p-channel thin-film transistors (TFTs). The hole transport characteristics of the corresponding devices were investigated by GIWAXS.