配合物[Ni(C6H4O2N)2(H2O)2]的合成及晶体结构

采用溶剂热法,用4-羧基吡啶和醋酸镍,合成了一个新的化合物[Ni(C6H4O2N)2(H2O)2],配合物中HC6H4O2N为4-羧基吡啶,并通过单晶体衍射测定了其结构.结构测定表明,该标题配合物属三斜晶系,空间群Pī,晶胞参数为a=6.3070(10)A.,b=6.9310(11)A.,c=9.2770(14)A.;α=96.313(2)°,β=105.189(2)°,γ=113.359(3)°,V=348.67(9)A.3,Z=1,Dc=1.786 g·cm-3,F(000)=194,μ=1.439 mm-1,λ(MoKα)=0.71073A.,Mr=374.98. 最终偏差因子(对I>2σ(I)的衍射点)R1=0.0783,ωR2=0.2055,对全部衍射点R1=0.0819,ωR2=0.2104,ω-1=[s2(F0)2+(0.1832P)2+ 0.0000P],P=(F02+2Fc2)/3.配合物分子中,中心离子Ni(Ⅱ) 采用六配位,6个配原子中,4个氧原子分别来自4个配位水,2个氮分别来自2个4-羧基吡啶,形成一个稍变形的具有对称中心的八面体结构.邻近配合物分子间通过4-羧基吡啶和配位水之间大量的氢键堆积成无限三维网状结构.     

分子动力学模拟水化硅酸钙Ca4Si6O14(OH)4·2H2O的结构

为了在原子水平上再现硅酸盐水泥的主要水化产物水化硅酸钙的结构,以Hamid模型为基础建立初始结构,采用分子动力学方法这一物质结构研究的新手段,模拟低钙比的Ⅰ型水化硅酸钙[Ca4Si6O14(OH)4·2H2O,C-S-H(Ⅰ)]的结构;根据模拟结果,比较分析水合硅酸钙晶体与无定形水化硅酸钙在结构上的异同,并且通过与实验数据的比较验证模拟结果的可靠性。模拟结果表明:水合硅酸钙晶体的结构长、短程确实都有序,而其无定形态的C-S-H(Ⅰ)只存在近程有序的结构特点,因为后者中Ca—O、Si—O、O—O及Si—Si等原子对的径向分布函数随着原子间距的增大而逐渐趋于1;C-S-H(Ⅰ)的基本结构单元为硅氧四面体,并且Si的最近邻Si数目为2,即硅氧四面体以Q2的形式连接而呈链状;模拟得到的Si与O、Ca与O的间距分别为0.162nm和0.264nm,Si的O配位数为4,这些结构参数基本与实验值相符合,说明模拟结果能够再现C-S-H(Ⅰ)的结构。     

Hydrothermal Synthesis, Crystal Structure and Characterization of New Coordination Polymer [Co2(pydc)2(H2O)6] n ·2nH2O

A coordination polymer of cobalt(II) containing the pyridine-2,5-dicarboxylate (pydc) ligand and having the composition [Co₂(pydc)₂(H₂O)₆] _n ·2nH₂O was prepared by the hydrothermal method. The coordination polymer was characterised by FTIR, single crystal XRD, SEM, TGA–DTA, and N₂ Temperature Programmed Desorption, Brunauer, Emmett and Teller surface area. The polymer contains two cobalt(II) ions with slightly distorted octahedral geometry. The carboxylate group at the 2-position of pyridine acts as a bridging ligand between two cobalt metal ions and this expansion leads to formation of a 1-D chain-like coordination polymer. The coordination polymer chains are packed together by well-directed hydrogen bonds to generate a three dimensional mesoporous network. The N₂ TPD study shows that the polymer is mesoporous in nature and possesses slit-shaped mesopores with average pore size diameter of 17.78 nm. SEM micrographs show well-defined channels in the solid crystals confirming the porosity of polymer. Thermogravimetric studies indicate the robust nature of the polymer. The polymer undergoes thermal decomposition in well-defined steps leading to the formation of cobaltous oxide as the end-product.     

[Co(Ⅱ)(H2O)6](C4H4O4)·2C6H12N4·4H2O修饰电极电化学催化谷胱苷肽研究

利用气相沉积法研制了基于TiO2凝胶固定化[Co(H2O)6](C4H4O4).2C6H12N4.4H2O(CoL)修饰电极。研究了该修饰电极对谷胱苷肽(GSH)的催化活性,发现在pH 7.5,0.1 mol/L NaAc-HAc的缓冲溶液中,CoL对电氧化GSH浓度之间有较好的线性关系.线性范围为2×10-6~1×10-4mol/L,检测下限为8×10-7mol/L,相对标准偏差为2.0%(cGSH=5×10-6mol/L,n=6)。应用该法测定生物样品中谷胱苷肽的含量并与紫外分光光度法进行对照,结果一致。     

Two Tartrate-Pillared Coordination Polymers: Hydrothermal Preparation, Crystal Structures, Spectroscopic and Thermal Analyses of {[M2(μ-C4H4O6)2(H2O)] · 3H2O}∞ (M = Mn, Cd)

Two novel three-dimensional coordination polymers, formulated as {[M₂(μ-C₄H₄O₆)₂(H₂O)] · 3H₂O}_∞ (M = Mn for 1 and Cd for 2), have been synthesized under hydrothermal reaction condition. Both complexes were characterized by elemental analysis and IR spectroscopy. Their molecular and crystal structures were determined by X-ray crystal structure analysis and their thermal stability by TGA-DTA methods. Compound 1 crystallizes in the monoclinic space group, P2₁, while compound 2 crystallizes the orthorhombic space group, P2₁2₁2₁. The structures are self-assembled from bifunctional tartrate and water molecules. Tartrate ligands in 1 and 2 contribute to both covalent and hydrogen bonds. Polymeric chains of 1 and 2 are composed of M(II) ions bridged by tartrate ions in O,O′ fashion. The asymmetric units of coordination polymers contain two metal centers having different coordination environments.     

Synthesis, Structure and Electrochemical Property of a New Three-Dimensional Inorganic–Organic Vanadate Coordination Polymer [Cu2(bbi)2(V4O12)] · 4H2O (bbi = 1,1-(1,4-butanediyl)bis(imidazole))

A new inorganic–organic vanadate coordination polymer [Cu₂(bbi)₂(V₄O₁₂)] · 4H₂O (bbi = 1,1-(1,4-butanediyl)bis(imidazole)) (1) has been synthesized under hydrothermal condition and characterized by elemental analyses, IR spectra and single crystal X-ray diffraction. Structure analysis revealed that the three-dimensional structure of compound 1 is constructed from two-dimensional [Cu(bbi)₂]²⁺ layers linked through {V₄O₁₂}⁴⁻ building blocks. Compound 1 represents the first example of metal-organic frameworks with non-interpenetrated five-connected topological network (4⁶·6⁴) based on Cu(II) as nodes, bbi and {V₄O₁₂}⁴⁻ as mixed spacers. The electrochemical behavior of 1 modified carbon paste electrode (1-CPE) in 1M H₂SO₄ aqueous solution has been studied. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

Synthesis and nanostructure of [Mo(C6H4O2)3]·2(C4H8N2O) and the synthesis from 1,2-PDA to (C4H8N2O)

Continuing our work on the synthesis of MoO₂L₂ and MoO₃L_AL_B that show excellent anti-cancer activities in vitro, the MoL₃ have been synthesized by the solvothermal reaction of Na₂MoO₄ with catechols and 1,2-DPA in the mixed solvent of MeCN/MeOH. X-ray diffraction revealed that Mo in chiral octahedral geometry coordinate with three catechol ligands formed three five-membered rings, and the [Mo(C₆H₄O₂)₃] are linked by hydrogen bonds Mo(OC₆H₄)O…H–N(C₄H₈O)N–H…O(C₆H₄O)Mo through the by-product (C₄H₈N₂O) that are formed by one 1,2-DPA with one CO₂ on the catalysis of Mo-complex. Also, we have disassembled bulk crystal into nano-aggregates, and under TEM mono-lamella morphology of nanostructures was observed, which agrees well with the previous conclusion that the morphologies of the nano-aggregates are associated with the quantum motifs in their crystal lattices. [Mo(C₆H₄O₂)₃] have also been characterized by UV–vis spectra, cyclic voltammogram and thermogravimetric analysis.     

超分子化合物[(C6H6N2O)2Co·2H2O]·2NO3的合成和晶体结构

合成了一个钴配合物[(C6H6N2O)2Co.2H2O].2NO3。该化合物属单斜晶系,P2(1)/n空间群,其化学式为:C12H16CoN6O10,Mr=463.24;晶胞参数:a=0.69527(10)nm,b=1.12250(15)nm,c=1.20352(17)nm,β=97.740(2)°,V=0.9307(2)(nm)3,Z=2,Dc=1.653 mg/m3,F(000)=474,μ=0.989 mm-1,最终偏离因子R1=0.0301,wR2=0.0791。配合物基本单元中含有一个Co(Ⅱ)离子、两分子吡啶酰胺、两分子配位水和两分子硝酸根离子。Co2 离子为六配位的畸变的八面体构型。另外,配合物中存在着丰富的氢键,这些分子间氢键相互加强了相邻单元间的结合,使晶体呈现三维网络超分子结构。     

有机模板硼酸盐[C4H12N]·[B5O6(OH)4]变温红外及发光性质研究

在温和条件下合成了一种有机胺硼酸盐[C4H12N]·[B5O6(OH)4],通过单晶衍射的手段解析其晶体结构.在不同温度下对该物质进行加热,观察其红外光谱的变化判断其内部的结构是否能够保持稳定,并通过热重分析进行补充说明.紫外发光光谱的测试表明,使用368 nm的激发光照射样品,可以得到430 nm,470 nm的发射光谱.在不同温度下加热后,该物质的发光特性发生明显的变化.这种变温的改性实验证实有机胺硼酸盐是一种可能的白光LED上的蓝光材料.     

Crystal and Supramolecular Structure of a Novel Organotin Sulphate: {[(Ph3Sn)2SO4]2 · (H2O)3} · 2EtOH

A novel sulphate of organotin was synthesized by the reaction of triphenyltin chloride with silver sulphate. The structure of {[(Ph₃Sn)₂SO₄]₂ · H₂O)₃} · 2EtOH has been determined by X-ray crystallography. The crystal data parameters are as follows: monoclinic, space group Cc, a = 14.146(6), b = 23.844(11), c = 23.777(11) Å, Z = 4. The title compound displays a dimeric tetra-tin nuclear structure. The geometry about tin is trigonal bipyramidal with a trans-O₂SnC₃ stereochemistry about the metal. Hydrogen bonding between the oxygen atoms of the anion and the solvate water produces a graphite-like 3D network lattice.     

An unusual o-metallated pyridyl dirhodium(II) complex: [Rh2{μ-(C5H3N)NH(C5H4N)}2{η2-(C5H4N)NH(C5H4N}2]Cl2·CH3OH

Reaction of Rh₂(O₂CMe)₄ and bis(2-pyridyl)amine, Hdpa, followed by addition of CH₂Cl₂ led to replacement of the acetate groups by Hdpa and orthometallation of two Hdpa pyridyl groups. The isolated complex, [Rh₂{μ-(C₅H₃N)NH(C₅H₄N)}₂{η²-(C₅H₄N)NH(C₅H₄N}₂]Cl₂ (1), has been characterized by X-ray crystallography, showing that the complex has two equatorially bound Hdpa groups and two bridging orthometallated dpa anions.     

配合物[Co(C9H6NO)3]·C2H5OH的醇热合成与表征

采用醇热合成法合成了标题化合物[Co(C9H6NO)3]·C2H5OH,测定了其晶体结构,晶体属于单斜晶系,P21/n空间群,晶体学参数为:a=1.1268(2)nm,b=1.3034(2)nm,c=1.6606nm(3),β=94.15(1)°,ν=2.4325(8)nm3,Ζ=4,Dc=1.468Mg/m3,F(000)=1112.配合物中有三个N原子和三个O原子与中心离子Co(Ⅲ)配位,形成畸变的八面体配位环境.配合物通过分子间氢键作用与溶剂乙醇分子形成二维超分子的晶体结构.     

配合物[Co(C6H4O2N)2(H2O)4]的合成与晶体结构

采用水热法,用氯化钻与异烟酸反应得到了分子式为[Co（C6H4O2N）2（H2O）4]的配合物,通过X-射线单晶衍射研究了其结构。该配合物的晶体属三斜晶系,空间群P-1,晶胞参数a=0．63736（19）nm,b=0．6921（2）nm,c=0．9282（3）nm,α=96．051（3）°,β=104．703（3）°,γ=0．113084（3）°,V=0．35454（18）nm^3,Z=1,Dc=1．757g／cm^2,Mr=375．20,F（000）=193,μ（MoKa）=1．257mm^-1,R1=0．0834,wR2=0．2302[I〉2σ（I）],晶体由具有六配位的畸变八面体结构的两性离子通过氢键和面．面π-π堆积构成。     

三维超分子化合物[Zn(C6H4O2N)2·(H2O)4]n的水热合成及晶体结构

用2-羧基吡啶和六水合氯化锌反应制备了一种新的三维氢键超分子配合物,经X-射线衍射分析确定了单晶结构。该晶体属单斜晶系,P2(1)/n空间群,晶胞参数为:a=9.836(2),b=5.2256(10),c=14.611(3),Mr=381.64,β=90.01(3)°,V=751.0(3)3,Z=2,Dc=1.688Mg.m-3,F(000)=392,μ=1.680mm-1,R=0.0258,wR=0.0612。共收集2159个衍射数据,其中1273个为独立衍射点(Rint=0.0332),可观测点数1139个(I>2σ(I))。结果表明,在组成该超分子体系的基本结构单元[Zn(C6H4O2N)2.(H2O)4]中,Zn(Ⅱ)离子形成六配位的畸变的八面体构型,配合物单元之间通过氢键OH…O相互连接,形成了无限延伸的具有网状结构的三维超分子体系。     

High-pressure behavior and phase stability of Na2B4O6(OH)2·3H2O (kernite)

The high-pressure behavior of kernite [ideally Na₂B₄O₆(OH)₂·3H₂O, a ~ 7.02 Å, b ~ 9.16 Å, c ~ 15.68 Å, β = 108.9°, Sp Gr P2₁/c, at ambient conditions], an important B-bearing raw material (with B₂O₃ ≈ 51 wt%) and a potential B-rich aggregate in radiation shielding materials, has been studied by single-crystal synchrotron X-ray diffraction up to 14.6 GPa. Kernite undergoes an iso-symmetric phase transition at 1.6-2.0 GPa (to kernite-II). Between 6.6-7.5 GPa, kernite undergoes a second phase transition, possibly iso-symmetric in character (to kernite-III). The crystal structure of kernite-II was solved and refined. The isothermal bulk modulus (K_V0 = β^-1_P0,T0, where β_P0,T0 is the volume compressibility coefficient) of the ambient-pressure polymorph of kernite was found to be K_V0 = 29(1) GPa and a marked anisotropic compressional pattern, with K(a)₀: K(b)₀: K(c)₀~1:3:1.5., was observed. In kernite-II, the K_V0 increases to 43.3(9) GPa and the anisotropic compressional pattern increases pronouncedly. The mechanisms, at the atomic scale, which govern the structure deformation, have been described.     

Decavanadate with a novel coordination complex: Synthesis and characterization of (NH4)2[Ni(H2O)5(NH3)]2(V10O28)·4H2O

A new compound (NH₄)₂[Ni(H₂O)₅(NH₃)]₂[V₁₀O₂₈]·4H₂O (1) containing a {V₁₀O₂₈} ⁶⁻ anionic cluster and a novel complex cation, [Ni(H₂O)₅(NH₃)]^2 +, has been synthesized and fully characterized by single crystal X-ray crystallography, spectroscopy and thermogravimetric analysis. The presence of the ammonia ligand in the complex cation in 1 was established unambiguously by X-ray crystallography and variable temperature (200–400 °C) thermogravimetric analyses in combination with FTIR spectroscopic studies. The formation of the novel complex species {Ni(H₂O)₅(NH₃)}^2 + during the synthesis of 1 can be rationalized in terms of ligand substitution involving {Ni(H₂O)₆}^2 +.     

0P—10～n—C6H13OH／c—C6H12／H2O体系W／O微乳液稳定条件的研究

对0P-10～n-C6H13OH／c-C6H12／H2O体系W／O微乳液的相组成和性质进行研究，并分析液晶相出现的原因。结果表明，当OP—10与正己醇质量比为2：1时，具有较宽范围的W／O微乳液相区域，且该微乳液体系对整个PH值变化不敏感，在室温下该微乳液仍有较大的稳定区。     

Lead–vitamin complex [Pb(C19H15N7O6)]·4H2O and its application in bioimaging

A new lead–vitamin complex [Pb(C₁₉H₁₅N₇O₆)]·4H₂O with strong fluorescence was successfully used as biological fluorescent probe for cellular bioimaging.     

[PW12O40]（C2N3H4）3·6H2O的水热合成和晶体结构

在水热条件下,合成出一例新的具有Keggin型结构的杂多酸化合物[PW12O40]（C2N3H4）3·6H2O（1）。利用单晶X-射线衍射分析了该化合物的结构,结果表明该化合物属于三方晶系,R-3空间群,晶胞参数为a=1.79590（3）nm,b=1.79590（3）nm,c=2.43480（5）nm,α=90°,β=90°,γ=120°,V=6.8008（2）nm3,Z=6,R1=0.0458,ωR2=0.1116。在该化合物中,质子化的1,2,4-三氮唑与[PW12O40]3-通过氢键作用形成三维超分子结构。