title: Polyatomic anion assistance in the assembly of [2]pseudorotaxanes.
abstract: We describe the use of polyatomic anions for the quantitative assembly of ion-paired complexes displaying pseudorotaxane topology. Our approach exploits the unique ion-pair recognition properties exhibited by noncovalent neutral receptors assembled through hydrogen-bonding interactions between a bis-calix[4]pyrrole macrocycle and linear bis-amidepyridyl-N-oxides. The complexation of bidentate polyatomic anions that are complementary in size and shape to the receptor's cavity, in which six NH hydrogen-bond donors converge, induces the exclusive formation of four particle-threaded assemblies.
authors.affiliation: Institute of Chemical Research of Catalonia, Avgda. Països Catalans 16, 43007 Tarragona, Spain.
authors.forename: Virginia
authors.initials: V
authors.lastname: Valderrey
authors.forename: Eduardo C
authors.initials: EC
authors.lastname: Escudero-Adán
authors.forename: Pablo
authors.initials: P
authors.lastname: Ballester