Deep Molecular Bowls with Four Pentagons

The study of deep molecular bowls featuring high curvature and tailored properties remains rare. In this work, we report a series of buckybowls that incorporate pyrrole-type and cyclopentadienyl-type pentagons. X-ray crystallographic analyses confirmed their significantly deepened bowl depths and high curvatures. Their reversible oxidation behaviors toward cationic radicals or dications and supramolecular properties with fullerenes have been thoroughly studied. Overall, this study provides a rational design strategy for deep buckybowls.