A Hydrogen-Bonded Hexagonal Buckybowl Framework

A hydrogen-bonded two-dimensionally networked buckybowl architecture is presented. Two types of hexagonal network (HexNet) structures (CPSM-1 and CPSM-2) have been achieved based on a sumanene derivative (CPSM) possessing 4,4-dicarboxy-o-terphenyl groups in the periphery. CPSM-1 has a waved HexNet structure with an alternate alignment of upward and downward bowls. CPSM-2 has a bilayered HexNet structure composed of hamburger-shaped dimers of the bowls. This demonstrates that non-planar -systems can be networked two-dimensionally by an appropriate supramolecular synthon to achieve structurally well-defined unique bumpy -sheets. Furthermore, we revealed that CPSM-2 undergoes anisotropic shrinking along the c axis by 11% under high pressure conditions (970MPa). The shrinkage is brought about by offset sliding between bumpy -surfaces of the bilayered HexNet sheets.