Three new uranyl-organic coordination polymers (UO2)8(NDC)12(4,4'-bipyH2)3(4,4'-bipyH)3 (1), (UO2)3O[Ag(2,2'-bipy)2]2(NDC)3 (2), and (UO2)2(NDC)2(2,2'-bipy)2 (3), where NDC=1,4-naphthalenedicarboxylate and bipy=bipyridine, have been prepared in hydrothermal conditions. Both 1 and 2 possess a 2D structure while 3 is composed of 1D zigzag chains. In 1 there are mononuclear pentagonal-bipyramidal U-O polyhedra and 1D channels filled with 4,4'-bipy molecules, whereas in 2 there are mononuclear hexagonal-bipyramidal U-O polyhedra and tetranuclear pentagonal-bipyramidal U-O clusters which form 2D channels with occluded [Ag(2,2'-bipy)2]+ counterions. In 3 both the NDC and the bipy ligands coordinate to uranyl centers, leading to hexagonal-bipyramidal polyhedra which are connected to form 1D zigzag chains. Under UV or visible irradiation, 1 and 2 degrade rhodamine B with similar efficiency. The correlation between photocatalytic reaction rate and oxygen concentration for 1 and 2 has also been elucidated. Crystal data: 1, triclinic, space group P1, a=11.037(2) A, b=15.126(3) A, c=15.660(3) A, alpha=62.05(3) degrees, beta=72.26(3) degrees, gamma=82.05(3) degrees, and Z=2; 2, triclinic, space group P1, a=14.161(3) A, b=15.122(3) A, c=18.212(4) A, alpha=85.73(3) degrees, beta=76.99(3) degrees, gamma=67.32(3) degrees, and Z=2; 3, monoclinic, space group P2(1)/n, a=10.7976(18) A, b=31.501(6) A, c=11.590(2) A, beta=97.609(4) degrees, and Z=4.

We have described an unprecedented three-dimensional zeolite-like copper iodide constructed from Cu4I4(DABCO)4 (DABCO = 1,4-diazabicyclo[2.2.2]octane) supertetrahedron units. This compound forms a four-connected network with new 6(6) topology. Its structure reveals one-dimensional channels along the [001] direction, and the framework displays interesting self-penetration. The title compound shows photoluminescence at room temperature in the solid state.

Two isomers of copper halides of the framework formula (CuI) 7 (DABCO) 2.5 were prepared by solvothermal methods, and their structures were determined by single-crystal X-ray diffraction. Both of the structures contain two types of secondary building units, which are connected differently giving rise to two three-dimensional structures. These two structures both contain FSC topology, which is only predicted by O'Keeffe in theory, and is the first observation, to our knowledge, of FSC topology in coordination polymers. The formations of these structures show a good example of different connectivity between the building units that can form different structures. The compounds have been characterized by powder X-ray diffraction, elemental analysis, thermogravimetric analysis (TGA), and photoluminescence studies.

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