Abstract
The synthesis, structure and properties of the bimetallic layered coordination polymer, [KDy(C8H3NO6)(3)(C8H5NO6)](n)center dot 2n(C10H9N2)center dot 5n(H2O) = [KDy(Hptc)(3)(H(3)ptc)](n)center dot 2n(Hbipy)center dot 5n(H2O), are described. The Dy3+ ion is coordinated by three O, N, O-tridentate doubly-deprotonated pyridine tri-carboxylate (Hptc) ligands to generate a fairly regular DyO6N3 tri-capped trigonal prism, with the N atoms acting as the caps. The potassium ion is coordinated by an O, N, O-tridentate H(3)ptc molecule as well as monodentate and bidentate Hptc ligands to result in an irregular KNO9 coordination geometry. The ligands bridge the metal-atom nodes into a bimetallic, layered, coordination polymer, which extends as corrugated layers in the (010) plane, with the mono-protonated bipyridine cations and water molecules occupying the inter-layer regions: Unlike related structures, there are no dysprosium-water bonds. Many O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds consolidate the structure. Characterization and bioactivity data are described. Crystal data: C52H42DyKN8O29, M-r = 1444.54, triclinic, P (1) over bar (No. 2), Z = 2, a = 9.188(2) angstrom, b = 15.7332(17) angstrom, c = 19.1664(19) angstrom, alpha = 92.797(6)degrees, beta = 92.319(7)degrees, gamma = 91.273(9)degrees, V = 2764.3(7) angstrom(3), R(F) = 0.029, wR(F-2) = 0.084.