KEu(PO): hydrothermal synthesis, crystal structure and photoluminescence properties.

An anhydrous orthophosphate, KEu(PO) (tripotassium pentaeuropium hexaphosphate), has been prepared by a high-temperature solid-state reaction combined with hydrothermal synthesis, and its crystal structure was determined by single-crystal X-ray diffraction analysis (SC-XRD). The results show that the compound crystallizes in the monoclinic space group C2/c and the structure features a three-dimensional framework of [Eu(PO)], with the tunnel filled by K ions. The IR spectrum, UV-Vis spectrum and luminescence properties of polycrystalline samples of KEu(PO), annealed at temperatures of 650, 700, 750, 800 and 850 °C, were investigated.

Four-Dimensional Incommensurate Modulation and Luminescent Properties of Host Material NaLa(PO).

A series of orthophosphates NaLn(PO) (Ln = lanthanoids) have for a long time been known as good luminescent materials, yet their crystal structures have not been studied in full detail. In this work, compound NaLa(PO) was prepared using molten salt (flux) method and for the first time was structurally determined on X-ray single-crystal diffraction data. Interestingly, it crystallizes in the four-dimensional incommensurately modulated structure with orthorhombic superspace group Pca2(0β0)000 and modulation wave vector q = 0.

CsAlZr2(PO4)4: an anhydrous aluminium zirconium phosphate with a novel three-dimensional framework.

Caesium aluminium dizirconium tetrakis[phosphate(V)], CsAlZr(2)(PO(4))(4), has been synthesized by high-temperature reaction and studied by single-crystal X-ray diffraction at room temperature. This represents the first detailed structural analysis of an anhydrous phosphate containing both zirconium and aluminium. The structure features a complicated three-dimensional framework of [AlZr(2)(PO(4))(4)] constructed by PO(4), AlO(4) and ZrO(6) polyhedra interconnected via corner-sharing O atoms, and one-dimensional Cs chains which are located in the infinite tunnels within the [AlZr(2)(PO(4))(4)] framework, which run along the c axis.

Ba5Cl4(H2O)8(VPO5)8: a novel three-dimensional framework solid.

The novel hydrothermally synthesized title compound, pentabarium tetrachloride octahydrate octakis(oxovanadium phosphate), Ba(5)Cl(4)(H(2)O)(8)(VPO(5))(8), crystallizes in the orthorhombic space group Cmca with a unit cell containing four formula units. Two Ba(2+) cations, two Cl(-) anions and the O atoms of four water molecules are situated on the (100) mirror plane, while the third independent Ba(2+) cation is on the intersection of the (100) plane and the twofold axis parallel to a. Two phosphate P atoms are on twofold axes, while the remaining independent P atom and both V atoms are in general positions.

1,5-Diphenyl-carbonohydrazide N,N-di-methyl-formamide.

In the title compound, C(13)H(14)N(4)O·C(3)H(7)NO, a 1,5-phenyl-carbonohydrazide mol-ecule cocrystallizes with an N,N-dimethyl-formamide mol-ecule. In the 1,5-phenyl-carbonohydrazide mol-ecule, the two phenyl rings are twisted by an angle of 45.8 (5)°.

Biphenyl-2,2',4,4'-tetra-carb-oxy-lic acid monohydrate.

In the title compound, C(16)H(10)O(8)·H(2)O, the dihedral angle between the two benzene rings is 71.63 (5)°. In the crystal structure, pairs of inversion-related mol-ecules are stacked [mean inter-planar spacing = 3.

Bis[N-benzyl-2-(quinolin-8-yl-oxy)acetamide]dichloridocopper(II) acetonitrile solvate monohydrate.

In the title complex, [CuCl(2)(C(18)H(16)N(2)O(2))(2)]·CH(3)CN·H(2)O, the six-coordinated Cu atom is in a distorted octa-hedral geometry with the donor centers of two O atoms and two N atom from two bidentate ligands, and two chloride ions. In the crystal, pairs of inter-molecular N-H⋯ Cl hydrogen bonds form centrosymmetric dimers and inter-molecular O-H⋯ O hydrogen bonds between the ligand and the uncoordinated water mol-ecules link the dimers into chains parallel to the c axis.

Aqua-[N-phenyl-2-(quinolin-8-yl-oxy)acetamide]dinitratozinc(II).

In the title complex, [Zn(NO(3))(2)(C(17)H(14)N(2)O(2))(H(2)O)], the six-coordinated Zn atom is in a distorted octa-hedral geometry, the donor centers being two O atoms and one N atom from the tridentate organic ligand, a water O atom and two O atoms from two monodentate nitrate ions. In the crystal, O-H⋯O hydrogen bonds between the coordinated water mol-ecules and nitrate O atoms and N-H⋯O hydrogen bonds between the main ligand and nitrate O atoms consolidate the three-dimensional network.