Trichalcogenasupersumanenes and its concave-convex supramolecular assembly with fullerenes

Abstract

AbstractSynthesis of buckybowls have stayed highly challenging due to the large structural strain caused by curvedπsurface. In this paper, we report the synthesis and properties of two trichalcogenasupersumanenes which three chalcogen (sulfur or selenium) atoms and three methylene groups bridge at the bay regions of hexa-peri-hexabenzocoronene. These trichalcogenasupersumanenes are synthesized quickly in three steps using an Aldol cyclotrimerization, a Scholl oxidative cyclization, and a Stille type reaction. X-ray crystallography analysis reveals that they encompass bowl diameters of 11.06 Å and 11.35 Å and bowl depths of 2.29 Å and 2.16 Å for the trithiasupersumanene and triselenosupersumanene, respectively. Furthermore, trithiasupersumanene derivative with methyl chains can form host-guest complexes with C60or C70, which are driven by concave-convexπ ⋯ πinteractions and multiple C–H ⋯ πinteractions between bowl and fullerenes.