Synergistic effect of tetraaryl porphyrins containing corannulene and other polycyclic aromatic fragments as host for fullerenes. Im- pact of C 60 in a statistically distributed mixture of atropisomers. Celedonio M. Álvarez,* Héctor Barbero, Sergio Ferrero and Daniel Miguel GIR MIOMeT, IU CINQUIMA/Química Inorganica, Facultad de Ciencias, Universidad de Valladolid, E-47011, Valladolid, Spain ABSTRACT: Symmetric meso-tetraaryl porphyrins bearing phenanthrene, pyrene and corannulene moieties in meta positions have been synthesized in a straightforward procedure under microwave irradiation by quadruple Suzuki-Miyaura reactions. Their 1 H NMR spectra showed the typical pattern of 4 atropisomers distributed accordingly to their statistical ratio not properly separable due to their fast isomerization. Their ability to bind Buckminsterfullerene has been tested with the whole mixture and different behaviors have been found, being isomer corannulene-substituted porphyrins the best hosts in the family. Porphyrins are a vast family of naturally occurring macrocycles having multiple functions in living beings. Many applications have been developed 1 by using these astounding architectures, being one of them their use as hosts for fullerenes, especially for C 60 , which is considered a very promising and potentially useful building block for new electronic devices. 2 The main approach in order to bind fullerenes by means of supramolecular forces has consisted of building structures with more than one porphyrin yielding