Cyclic Dimers of Metalloporphyrins as Tunable Hosts for Fullerenes: A Remarkable Effect of Rhodium(III)

Abstract

Supramolecular interaction of fullerenes with cyclic dimers metalloporphyrins (1-m, M = central metal ions) showed a pronounced dependence on the nature of the metal ions, whereby 1-RhMe/fullerene systems displayed extremely high association constants (ca. 108M-1) and low dissociaton activities. Crystal-structure analysis and NMR data suggested a charge-transfer interaction and van der Waals interactions between the host and guest.