Unprecedented 4- and 6-connected 2D coordination networks based on 4(4)-subnet tectons, showing unusual supramolecular motifs of rotaxane and helix

Two unprecedented 2D coordination polymers with 4- and 6-connected topological nets, arising from the different linkages of two adjacent 4(4) layers, were prepared from Co(II), 1,3-bis(4-pyridyl)propane, and different isophthalate tectons.