H. Sleiman et al., SELF-ASSEMBLY OF RIGID-RACK MULTIMETALLIC COMPLEXES OF ROTAXANE-TYPE, Journal of the Chemical Society, Chemical Communications, (7), 1995, pp. 715-716
Reaction of copper(i) ions with the oligobipyridine ligands 1 and the
macrocycle 2 leads to the self-assembly of the di- and tri-nuclear rig
id-rack complexes 3 of rotaxane type, whose nature has been confirmed
by determination of the crystal structure of 3b.