Structure of Trinuclear Cadmium Complex withAcetato and Pyridine Ligands

The crystal of the title complex with formula C48H52N8O16CI2Cd3(Mr=1405. 10) was crystallized in monoclinic, space group P21/n, with a=12. 666 (3), b=18. 306(6), c=13. 231 (4) A, p=111. 68(3), V=2851 (2) A3, Z=2, Dr=1. 637 g/cm-3 p=12. 680 cm-1, F(000)=1404. The final refinement is convergedwith R=0. 052 and Rw=0. 055. In the molecule [Cd3(py8(Oac)4] (CIO4)2, the aver-age values of Cd-N and Cd-O bonds are 2. 306 and 2. 288 A, respectively. In thecanon of the title complex. each Cd atom is coordinated by N and O atoms, which arefrom pyridine molecules and acetatoes, respectively, to form a distorted octahedron.And three Cd atoms are linked by two u2-O atoms of two acetatoes and other two u-ac-etato side bridges.

Synthesis, Crystal Structure and Luminescence Property of a Cd(Ⅱ) Complex Assembled by 4-Carboxymethoxy Phenylacetic Acid

A new structure with the molecular formula [CdL]n was formed by CdSO4 with 4-carboxymethoxy phenylacetic acid （H2L） through the hydrothermal method. The complex was characterized by elemental analysis and infrared spectroscopy. The structure of the complex was determined by single-crystal X-ray diffraction, which is of monoclinic system, space group P21/c with a = 10.3887（2）, b = 7.10710（10）, c = 14.7212（2） , β = 120.6940（10）°, V = 934.65（3） 3, Dc = 2.278 g·cm-3, Z = 4, F（000） = 624, S = 1.022, the final R = 0.0187 and wR = 0.0487 for 2000 observer reflections （Ⅰ 〉 2σ（Ⅰ））. The center metal ion Cd（Ⅱ） in the complex is six-coordinated in a distorted octahedral geometry, and is connected with L ligands to form a 3D fishing net structure, which is a novel （3,6） network topology. The luminescence of the complex has been investigated, and the result reveals that it displays luminescent property in the voilet region.

Syntheses,Crystal Structures and Characterization of Two Coordination Polymers Based on Mixed Ligands

Two new coordination polymers,namely,{[Cd（1.5）（bc）2（HL）]（13）H2O}（2n）（1） and [Mn（ip）（H2L）（H2O）]n（2）（H2L = 3-（1 H-pyrazol-4-yl）-5-（pyridin-2-yl）-1,2,4-triazole,Hbc = benzoic acid,H2 ip = isophthalic acid） were constructed by solvothermal reaction.The compounds were characterized by elemental analysis,FT-IR spectroscopy,and single-crystal X-ray diffraction.Compound 1 displays a two-dimensional plane structure consisting of [Cd3（bc）2（HL）] subunits.Compound 2 possesses a one-dimensional chain structure and is further extended into a 3-D supramolecular architecture via hydrogen bonds.Moreover,photoluminescence studies showed compound 1 exhibits luminescent emissions with emission maxima at 375 nm.Magnetic susceptibility measurements of 2 indicate that domain antiferromagnetic interactions exist between Mn（Ⅱ） ions.In addition,thermogravimetric properties of 1 and 2 were also measured.

Syntheses,Crystal Structures and Photoluminescent Properties of Two New 1-D d^10 Metal Complexes Based on Tetrazole 1-Acetato Ligand

Two new tetrazole 1-acetato complexes, [Ag（1-tza）（phen）]∞ （1） and [Cd（1- tza）2（2,2＇-bipy）]∞ （2） （1-Htza = tetrazole 1-acetato, phen = 1,10-phenanthroline, 2,2＇-bipy = 2,2＇-bipyridine）, have been synthesized by solvothermal synthesis and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. Complex 1 shows a 1-D chained structure, while the structure of 2 contains two 1-D chains, which is the first 1-tza-based complex containing three different coordination modes of the 1-tza ligand. The aromatic stacking effects play an important role in the formation of supramolecular frameworks of these two complexes. Photoluminescent studies show that the two complexes exhibit efficient luminescence. In addition, optical diffuse reflectance spectra and thermogravimetric analyses of 1 and 2 have also been investigated.

Spacer Length Effects on the Structure of Cd(Ⅱ)Coordination Polymers with Flexible Bis(thiabendazolyl)(1)Alkane and 1,2,4,5-Benzenetetracarboxylte Ligands

The hydrothermal reactions of Cd（OAc）2·2H2O with 1,2,4,5-benzenetetracarboxylic acid（H4bta） and 1,4-bis（thiabendazolyl）butane（L1） or 1,6-bis（thiabendazolyl）hexane（L2） afforded two coordination polymers [Cd2（L1）（bta）·2H2O]n（1） and [Cd2（L2）2（H2bta）2]n（2）. Complex 1 holds a rare 3D binodal（4,6）-connected framework with fsh topology. Complex 2 features an infinite meandering chain structure, which is further extended via O–H···O hydrogen bonding into a 3D supramolecular network. The thermal and fluorescence proprieties of the two complexes were investigated.

Hydrothermal Syntheses and Crystal Structures of Two Complexes with Cyclic Dimer and 2D Network Structures of 3-Nitrophthalate and N-Donor Ligand

Two complexes, [Cd（nphth）（2,2＇-bipy）（H20）]2.2H20 （1） and [Cd（nphth）（4,4＇- bipy）（H20）], （2） （nphth = 3-nitrophthalate, 2,2＇-bipy = 2,2＇-bipyridine, 4,4＇-bipy = 4,4＇-bipyridine）, were synthesized by hydrothermal reactions and structurally characterized. Complex 1 crystallizes in triclinic with space group Pi, a = 0.7599（4）, b = 1.0551（6）, c = 1.2448（6） nm, α = 88.96（2）, β = 75.40（2）, γ= 76.76（2）°, V= 0.9393（9） nm3, Z = 1, Dc = 1.816 Mg/m3, F（000） = 512, μ = 1.217 mm-1, S = 0.946, the final R = 0.0238 and wR = 0.0631, Complex 2 crystallizes in monoclinic, space group P21/c, a = 0.737（5）, b = 2.338（1）, c = 1.0030（6） nm, β = 96：359（9）°, V= 1.803（2） nm3, Z = 4, Dc = 1.826 Mg/m3, F （000） = 984,μ = 1.260 mm-1, S = 1.016, the final R = 0.0455 and wR = 0.1007. Complex 1 exhibits a discrete cyclic binuclear structure and complex 2 possesses a 2D layer structure with cyclic binuclear unit. The fluorescent spectrum study shows that complex 1 exhibits fluorescent emission in the solid state at room temperature.

Syntheses and Structural Characterization of Multi-component Chalcogenide Compounds Based on Pyridine/1,2-Ethanedithiol Solvent

Reactions of Sn powder, cadmium iodide, rubidium carbonate, and sodium sulfide yielded two new compounds： three-dimensional chalcogenide Rb Na_3Cd_2Sn_2S_8（1） and layered ternary compound Na_2CdS_2（2）. 1 and 2 have been determined by single-crystal X-ray diffraction： 1 belongs to the orthorhombic space group Pca21, with a = 13.486（3）, b = 6.7310（14）, c = 18.401（4） ？ and Z = 4; 2 crystallizes in the R 3 m space group, with a = 3.718（3）, c = 26.170（4） ？ and Z = 3. Study of the yellow block shaped crystals of 1 reveals that the structure consists of tetrahedral CdS_4 and SnS_4. The {Cd_2Sn_2S_8} cluster shows a 12-numbered ring structure assembled by corner-sharing of alternating SnS_4 and CdS_4, and the rubidium and sodium ions act as void-filling and charge compensating cations. The dark orange hexagonal crystal of compound 2 consists of a unique 1$[CdS_2]^（2-） layer, which are separated by the Na＋. UV/Vis absorption spectrum exhibits the materials 1 and 2 have semiconductor properties.

Construction and the Second-order Nonlinear Optics of a New Chiral Coordination Network Based on Two Types of Homo-chiral Helices

A new 2D chiral cadmium coordination network [Cd（TCBA）2]？2EtOH （1） was prepared by the reaction of achiral angular asymmetric bridging ligand 2-（（3,5-dimethyl- 4H-1,2,4-triazol-4-yl）-carbamoyl）-benzoic acid （TCBA） with cadmium acetate, which was structurally characterized by IR, elemental analysis, thermogravimetric analysis and single-crystal X-ray diffraction. Complex 1 crystallizes in the chiral space group P21 and features a 2D chiral network consisting of two types of homo-chiral helices, which are further extended into a 3D chiral framework along the a-axis via hydrogen bonds. Moreover, powder second-order nonlinear optical （NLO） measurements reveal complex 1 has a modest second-harmonic-generation （SHG） efficiency at room temperature.