Recent Advances in the Syntheses of Helicene-Based Molecular Nanocarbons via the Scholl Reaction

Molecular nanocarbon materials with well-defined structures constructed through organic synthesis have attracted much attention in recent years, exhibiting unique properties and broad applications in many areas. The combination of helicenes and molcular nanocarbons generates a fancinating type of chiral molecular nanocarbons with potential applications in the fields of chiral optics, chiral optoelectronics and spintronics etc. However, it is of greart challenge to synthesize these molecules due to the large intramolecular strain and the special helical structure. Among various synthetic strategies, the Scholl reaction possesses the advantages of mild conditions and high efficiency. In this review, recent advances in the syntheses of helicene-based molecular nanocarbons via the Scholl reaction are summarized, and our perspectives to stimulate further development of the chiral nanocarbon materials are also provided.