Palladium-Templated Subcomponent Self-Assembly of Macrocycles, Catenanes, and Rotaxanes

摘要

The reaction of 2,6-diformylpyridine with diverse amines and Pd~(II) ions gave rise to a variety of metallosupra-molecular species, in which the Pd~(II) ion is observed to template a iridenlate bis(imino)pyridine ligand. These species included a mononuclear complex as well as [2+2] and [3+3] macro-cycles. The addition of pyridine-containing macrocyclic capping ligands allows for topological complexity to arise, thereby enabling the straightforward preparation of structures that include a [2]catenane, a [2]rotaxane, and a doubly threaded [3]rotaxane.