Unusual pillar-layer framework of a heterometallic dysprosium(III)–silver(I) coordination polymer with (3,4,5)-connected topology

The self-assembly of pyridinecarboxylate ligand (H2L) with mixed metal ions under hydrothermal conditions afforded a new heterometallic coordination polymer, [DyAg(L)2(H2O)]n·2n(H2O) (1 H2L = 5-(pyridine-4-ylmethoxy)-isophthalic acid). Single-crystal X-ray diffraction analysis reveals that 1 features an unusual three-dimensional (3D) pillar-layer framework with an unprecedented (3,4,5)-connected topology. Interestingly, each individual structure is interpenetrated by another identical one.