Chemistry Letters, Vol.49, No.8, 892-895, 2020
A Directly-linked Cyclic Pyrene Tetramer as a Back-to-back Receptor for Two Fullerenes
As a homoditopic back-to-back host molecule, a cyclic 1,8-pyrenylene tetramer CP4 having two cavities for guest complexation was investigated. The unique two-face structural feature of CP4 allows it to bind spherical pristine fullerenes. The host-guest interactions were characterized by H-1 NMR spectroscopy and single-crystal X-ray diffraction analysis.