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 (4(8), 6(6).8)(4(13).6(2)) topology. The complex exhibits photoluminescence at 546 nm (lambda(ex) = 350 nm). (c) 2008 Elsevier B.V. All rights reserved.