A lead(II)-orotate coordination polymer with a new coordination mode: Synthesis, structure and luminescent property

A lead(II) orotate complex [Pb(HOr)(H2O)]n (1), (H3Or = orotic acid) was synthesized under hydrothermal condition and characterized by X-ray diffraction, IR, solid-state photoluminescence and thermogravimetric analysis. Lead atom in 1 is in a holodirected eight-coordinated polyhedron and the orotate ligand exhibits a new and unique hexametallic coordination mode. The lead complex shows a 6,6-connected (48, 66, 8)(413, 62) topology. The complex exhibits photoluminescence at 546 nm (λex = 350 nm).