Triazatruxene-based materials for organic electronics and optoelectronics

10,15-Dihydro-5H-diindolo[3,2-a:3′,2′-c]carbazole (triazatruxene or triindole), which is an aromatic and C₃ symmetric planar π-extended conjugated structure, has attracted a great deal of interest due to its exceptional solubility, high thermal stability, rich-electronic properties and easy modification. Over the past ten years, owing to the advances in the synthesis of triazatruxene derivatives, the scope of applications of this attractive building block has been extended to organic electronics, two-photon absorption, nonlinear optics, fluorescent sensors, etc. This review aims at summarizing investigations into triazatruxene-based organic electronic materials from synthesis and self-assembly to optoelectronic properties to achieve a better understanding on the structure-function relationships and to explore their extensive applications. The potential of these highly promising scaffolds in future research will also be put forth.