Host complexes that adapt to their guests: amphitopic receptors

Palladium (II) lantern complexes with the bis(pyridyl) ligand NN = 1,3-C6H4(CONH-3-C5H4N)(2), which can act as receptors for either cations or anions by adjusting the conformation of the amide substituents to accommodate the guest, are termed amphitopic receptor. (C) 2003 Elsevier B.V. All rights reserved.