A Deep‐Red Emissive Sulfur‐Doped Double 7Helicene Photosensitizer: Synthesis, Structure and Chiral Optical Properties

Doping of polycyclic conjugated hydrocarbons (PCHs) with sulfur atoms is becoming more and more important as a means of creating unique functional materials. Recently, thiophene-containing multiple helicenes have garnered enormous attention due to their intriguing electronic and (chir)optical properties compared with carbohelicenes. However, the efficient synthesis of thiopyran-containing multiple helicenes and the underlying sulfur doping mechanisms are rather unexplored. Herein, the synthesis and structural analysis of a thiopyran-containing double 7helicene 3 are reported. X-ray crystallographic analysis reveals 3 and its dication with C