Shao-Ming Ying

[Tb(pyrazinecarboxylic acid)3(H2O)2] · 6n H2O: Synthesis, structure and photoluminescence

Abstract A novel terbium compound [Tb(pyrazinecarboxylic acid)3(H2O)2]n · 6n H2O (1) has been prepared via hydrothermal reaction and structurally characterized by single-crystal X-ray diffraction. The crystal belongs to the orthorhombic, space group Pbca with a = 19.4112(7), b = 11.9345(4), c = 19.8507(7) Å, V = 4598.7(3) Å3, Z = 8, C15H25N6O14Tb, Mr = 672.33, Dc = 1.942 g/cm3, S = 1.052, μ(MoKα) = 3.159 mm–1, F(000) = 2672, R = 0.0190 and wR = 0.0423. Compound 1 features an infinite 1-D chain-like structure with the terbium ions coordinating to six oxygen and three nitrogen atoms to give a distorted monocapped square antiprism. The [Tb(pyrazinecarboxylic acid)3(H2O)2]n chains and the lattice water molecules link to each other through π–π interactions and hydrogen bonding interactions to construct a 3-D supramolecular network. Photoluminescent investigation reveals that the title compound displays strong emissions that are attributed to the characteristic emissions of 5D4 → 7FJ (J = 3, 4, 5, 6) of Tb3+ ions.

Synthesis, structure, and properties of [Gd(C6NO2H5)3(H2O)2]2 n · ( n H5O2)( n ZnCl5)(2 n ZnCl4) · (2 n H2O) with strong fluorescence

A 1-D metal-isonicotinato inorganic–organic hybrid complex [Gd(C6NO2H5)3(H2O)2]2 n · (nH5O2)(nZnCl5)(2nZnCl4) · (2nH2O) (1) has been synthesized via hydrothermal reaction and structurally characterized by single-crystal X-ray diffraction. Complex 1 is a 1-D polycationic chain-like structure with unprecedented . Optical absorption spectra of 1 reveal the presence of an optical gap of 3.35 eV. Photoluminescence investigations reveal that the complex 2 display a strong blue-light fluorescent emission band.

Synthesis, structure and property of a metal sulfochloride–Hg 3 S 2 Cl 2

The compound [Hg3S2CI2] has been obtained by solid-state reactions. It crystallises in the acentric space group R3 of the rhombohedral system with six formula units in a cell [a = b = 12.654(3), c = 7.753(4) Å, V = 1075.1(6) Å3, CI2Hg3S2, M r = 736.79, D c = 6.828 g cm−3, S = 0.987, μ(MoKα) = 65.308 mm−1, F(000) = 1836, R = 0.0631 and wR = 0.1443] and is characterised by a 3-D framework structure, which is composed of interconnected right-handed helices formed by tetrahedral Hg atoms. Optical absorption spectra reveal the presence of an optical bandgap of 2.51 eV and the composition Hg3S2CI2 is confirmed by semiquantitative microscope analysis.

A novel 2-D 5d-4f-3d trimetal-isonicotinic acid complex: synthesis and characterisation

A novel trimetallic–isonicotinic acid complex [Zn0.5(H2O)]{(Hg2Cl5)[Eu(C6NO2H4)3(H2O)2]}(HgCl2)·H2O (1) has been synthesised and structurally characterised by single-crystal X-ray diffraction. Complex 1 features a novel 2-D {(Hg2Cl5)[Eu(C6NO2H4)3(H2O)2]} layer constructed from [Eu(C6NO2H4)3(H2O)2] chains interconnected by Hg2Cl5- linkers. The 2-D {(Hg2Cl5)[Eu(C6NO2H4)3(H2O)2]} layers are held together via hydrogen bonds and π–π interactions to yield a 3-D supramolecular framework with the lattice water molecules, the mercury chloride and the hydrated zinc ions located in the cavities.

Diaqua­bis(5-carb­oxy-2-methyl-1H-imidazole-4-carboxyl­ato-κ2N3,O4)manganese(II)

The title complex, [Mn(C6H5N2O4)2(H2O)2], was obtained by hydrothermal synthesis. The MnII atom, which lies on an inversion centre, displays a slightly distorted octahedral geometry. In the crystal packing, complex molecules are linked by intermolecular O—H⋯O and N—H⋯O hydrogen bonds to form a three-dimensional supramolecular structure. The title complex is isostructural with the corresponding cadmium(II) complex [Nie, Wen, Wu, Liu & Liu (2007 ▶). Acta Cryst. E63, m753–m755].

cis-Dichloridobis(1,10-phenanthroline)cobalt(II) dimethyl-formamide solvate.

In the title complex, [CoCl2(C12H8N2)2]·C3H7NO, which has twofold rotation symmetry, the CoII cation is coordinated by two 1,10-phenanthroline (phen) molecules and two chloride ligands in a distorted octahedral geometry. In the crystal structure, a cavity is created by six complex molecules connected by C—H⋯π interactions and non-classical C—H⋯Cl hydrogen bonds. The cavities are occupied by the disordered dimethylformamide solvent molecule. The C and N atoms of the C—N bond in the solvent molecule also lie on a crystallographic twofold rotation axis; the remaining atoms of the solvent are statistically disordered (ratio 0.5:0.5) about this axis.

Synthesis, Structure, Photoluminescence and Theoretical Study of {(N,N'-Dimethyl- 4,4'-bipyridinium)(Cd2(μ2-Cl)4Cl2)}n with N,N'-Dimethyl-4,4'-bipyridinium Generated in Situ

The title complex, (N,N′-dimethyl-4,4′-bipyridinium)[Cd2(μ2-Cl)4Cl2]n (1), in which the N,N′-dimethyl-4,4′-bipyridinium was generated in situ, was synthesized via hydrothermal reaction. X-Ray diffraction analysis revealed that the structure of 1 consisted of MV2+ (MV2+ = N,N′-dimethyl-4,4′-bipyridinium) cationic moieties and infinite [Cd2(μ2-Cl)4Cl2]n anionic chains. The cadmium atom was bound by one terminal chlorine atom and four μ2-bridging chlorine atoms, yielding a slightly distorted triangular bipyramid. Photoluminescent investigation revealed that the complex displayed an emission in greenish blue region.

Solid-state synthesis and crystal structure of a novel quaternary metal chalcogenide

An unprecedented quaternary metal chalcogenide hg3Zn2S4I2 (1) has been obtained by solid-state reaction and structurally characterised by X-ray diffraction. Compound 1 crystallises in the space group C2221 of the orthorhombic system with four formula units in a cell: a = 12.571(4), b = 7.258(3), c = 10.742(4) Å, V = 980.1(6) Å3, Hg3I2S4Zn2, M r = 1114.55, D c = 7.553 g cm−3, T = 123.15 K, F(000) = 1880 and R1/wR2 = 0.0636/0.1658 for 542 observed reflections (I > 2σ(I)) and 572 unique reflections. Compound 1 is characterised by a novel 3-D framework motif.

Bis(μ-carboxyl­atoethyl­phospho­nato)bis­[aqua­(2,2′-bipyridine)manganese(II)]

The title compound, [Mn2(HO3PCH2CH2COO)2(C8H8N2)2(H2O)2], was obtained by hydrothermal synthesis. The manganese(II) ions are six-coordinate and are linked by two 2-carboxyethylphosphonate ligands, forming a centrosymmetric dimer. The Mn ions adopts a distorted octahedral coordination geometry. The dimers are further linked by O—H⋯O hydrogen bonds and π–π stacking interactions [centroid–centroid distance 4.2754 (4) Å].

Bis(4H-1,2,4-triazol-3-yl)disulfane

The title compound, C4H4N6S2, was synthesized by the reaction of 3-mercapto-1H-1,2,4-triazole with sodium hydroxide in ethanol. The molecule possesses a crystallographically imposed twofold axis. Intermolecular N—H⋯N hydrogen bonds link the molecules into chains along the c axis.