Constructing cerium supramolecular wheels and encapsulating uranium with a Schiff-base calixpyrrole ligand

Trinuclear, supramolecular wheel structures are formed spontaneously from the metallation of a Schiff-base-pyrrole macrocycle by Ce3+ cations, while the related actinide U3+ cation is instead oxidised to U4+ and encapsulated by the macrocyclic framework.