pH-Controlled Assembly of Two Unusual Entangled Motifs Based on a Tridentate Ligand and Octamolybdate Clusters: 1D + 1D → 3D Poly-Pseudorotaxane and 2D → 2D → 3D Polycatenation

Two unusual entangled motifs of [Ag0.52Na0.48(β-Mo8O26)­(H2O)]­[Ag3(Tipa)2] (1) and [Ag6(Tipa)4(β-Mo8O26)]­[H2(β-Mo8O26)]·5H2O (2) based on a tri­(4-imidazolylphenyl)­amine (Tipa) ligand and octamolybdate clusters have been successfully synthesized at different pH values. In compound 1, the 1D inorganic chains and 1D ladders are entangled to give a highly novel 1Dladder +1Dchain → 3D poly-pseudorotaxane framework. The unusual topological feature of 2 consists of the 2-fold interpenetrated layer, which is further catenated to the two adjacent such sheets in parallel fashion to give an overall unique (2D → 3D) polycatenated framework. The luminescent properties of the compounds have also been investigated.