An unusual two-fold interpenetrating polyrotaxane motif comprised of two interlocked sets of identical diamond nets

A novel 3D coordination polymer [Cd2(cca)2(bib)3]⋅3H2O (1, H2cca = 4-carboxycinnamic acid, bib = 1,4-bis(imidazole)butane) has been synthesized. This compound exhibits an unusual two-fold interpenetrating polyrotaxane-like structure comprised of two interlocked sets of identical diamond nets.

► A novel 3D coordination polymer was synthesized and characterized by X-ray analysis.
► This compound presents the coexistence of different entangled modes in one structure.
► The luminescent property of this compound was investigated in the solid state at room temperature.