Crystal structure of poly[aqua(μ2-2,5-bis(4-pyridyl)-1,3,4-oxadiazole-κ2 N,N)(μ2-1,3-phenylenediacetato-κ3 O,O′:O′′)cobalt(II)], C22H18CoN4O6

C22H18CoN4O6, monoclinic, P21/c (no. 14), a = 8.540(2) Å, b = 11.371(3) Å, c = 23.441(5) Å, β = 95.298(3)°, V = 2266.6(9) Å3, Z = 4, R gt (F) = 0.0652, wR ref (F 2 ) = 0.1743, T = 293(2) K.

A three-dimensional CdIIcoordination framework: poly[di-μ2-aqua-{μ2-1,4-bis[(1H-1,2,4-triazol-1-yl)methyl]benzene-κ2N4:N4′}di-μ3-terephthalato-κ3O:O′:O′′-dicadmium(II)]

The title CdIIcoordination polymer, [Cd(C10H8O4)(C12H12N6)0.5(H2O)]n, has been obtained by the hydrothermal method and studied by single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis, IR spectroscopy and fluorescence spectroscopy. The compound forms a novel three-dimensional framework with 3,8-connected three-dimensional binodal {4.52}2{42.510.612.7.83} topology. An investigation of its photoluminescence properties shows that the compound exhibits a strong fluorescence emission in the solid state at room temperature.

Poly[[μ2-1,3-bis(pyridin-4-yl)propane](μ3-1,4-phenylenediacetato)cadmium]

Solvothermal reaction between Cd(NO(3))(2), 1,4-phenylenediacetate (1,4-PDA) and 1,3-bis(pyridin-4-yl)propane (bpp) afforded the title complex, [Cd(C(10)H(8)O(4))(C(13)H(14)N(2))](n). Adjacent carboxylate-bridged Cd(II) ions are related by an inversion centre. The 1,4-PDA ligands adopt a cis conformation and connect the Cd(II) ions to form a one-dimensional chain extending along the c axis. These chains are in turn linked into a two-dimensional network through bpp bridges. The bpp ligands adopt an anti-gauche conformation. From a topological point of view, each bpp ligand and each pair of 1,4-PDA ligands can be considered as linkers, while the dinuclear Cd(II) unit can be regarded as a 6-connecting node. Thus, the structure can be simplified to a two-dimensional 6-connected network.