Synthesis and Crystal Structur of (4,4′-H_2bipy)[CdBr_4]·H_2O

The title compound (4,4′-H2bipy)[CdBr4]·H2O 1 has been synthesized via hydrothermal reaction and characterized by X-ray diffraction. The crystal belongs to monoclinic,space group P21/c with a=8.260(3),b=23.926(7),c=9.774(2),β=106.777(9)o,C10H12Br4CdN2O,Mr=608.26,V=1849.4(9)3,Z=4,Dc=2.185 g/cm3,S=1.005,μ(MoKα) =9.814 mm–1,F(000)=1128,R=0.0646 and wR=0.0989. The crystal structure analysis of 1 reveals that the title compound features an isolated structure,based on discrete 4,4′-H2bipy moieties and lattice water molecules which are linked by hydrogen bonds together with tetra-hedral cadmium atoms terminally coordinated by four bromine atoms.     

铜配合物[Cu(2,2''''-bipy)(pydco)(H2O)]·4H2O的合成与晶体结构

配合物[Cu(2,2’-bipy)(pydco)(H2O)].4H2O(2,2’-bipy=2,2’联吡啶,pydco=氮氧化-2,6-二甲酸吡啶)的结构由X-射线测定,配合物属三斜晶系,P墿空间群,晶胞参数:a=0.68120(14),b=1.1850(2),c=1.2554(3)nm,α=86.06(3),β=81.60(3),γ=86.16(3)°,V=0.99854(4)nm3,Z=2。2,2’联吡啶提供两个配位原子(N1,N2),氮氧化-2,6-二甲酸吡啶提供两个配位氧原子以及一个配位水提供一个氧原子参与了配位,中心Cu(II)离子是一个畸变的四角锥结构。有趣的是,配合物的结晶水组成了一条条的水带,配合物分子正是由这些水带中的氢键连接在一起的。     

三维Y(Ⅲ)-Ag(Ⅰ)异金属配位聚合物的合成、晶体结构与性质研究

以异烟酸(Hina)和2-磺基苯甲酸(H2L)为配体,在水热条件下与Y(Ⅲ)和Ag(Ⅰ)离子进行协同配位,合成了一个异金属配位聚合物[Y2Ag2L2(ina)4(H2O)2]n(1)。通过X-射线衍射、热重分析、元素分析和红外光谱对其进行表征。X-射线单晶衍射测定其结构为单斜晶系,P21/n空间群,晶胞参数a=0.914 43(3)nm,b=1.378 39(5)nm,c=1.760 76(5)nm,β=102.315(3)°,V=2.168 27(12)nm3,Z=4。它含有一个以羧基O原子桥连的中心对称的四核异金属原子簇[Y2Ag2L2],相邻的原子簇之间通过异烟酸配体相互连接成三维金属有机骨架结构。     

Conformation Diversity of Complexes Constructed by N-（2-Pyridylmethyl）-phenylalanine and Zn（Ⅱ）

Four configurationally and conformationally related Zn（II） complexes with a tridentate ligand namely, N-（2-pyridylmethyl）-phenylalanine （Hpmpa）, have been synthesized by hydrothermal reactions. [Zn（L-α-pmpa）2·HaO] 1： orthorhombic, space group P21212 with a = 15.1091（7）, b = 16.2417（8）, c = 5.9972（3） A, V= 1471.70（12）A^3, Z = 2, Mr = 593.97, Dc = 1.340 g/cm^3,μ = 0.879 mm^-1, F（000） = 620, Rint= 0.0205, R = 0.0450 and wR = 0.1578 for 3102 observed reflections with I 〉 2σ（I）; [Zn（D-α-pmpa）2·2H2O] 2： orthorhombic, space group P21212 with a = 15.1023（6）, b = 16.2516（7）, c = 6.0024（2）A, V= 1473.21（10）A^3, Z = 2, Mr = 611.98, Dc = 1.380 g/cm^3,μ = 0.882 mm^-1, F（000） = 640, Rint= 0.0337, R = 0.0484 and wR = 0.1435 for 2408 observed reflections with I 〉 2σ（I）; [Zn（L-β-pmpa）2] 3： monoclinic, space group C2/c with a = 27.8667（5）, b = 5.60350（10）, c = 19.9636（2）A β = 120：2210（10）°, V = 2693.66（7）A^3, Z = 4, Mr = 575.95, De= 1.420 g/cm^3,μ = 0.955 mm^-1, F（000） = 1200, Rint= 0.0345, R = 0.0358 and wR = 0.1135 for 2251 observed reflections with I 〉 2σ（I）; and [Zn（D-β-pmpa）2] 4. They are all mononuclear discrete structures. The influence of temperature and pH on the conformation of structures has been investigated. Moreover, the photoluminescent properties of compounds 1 and 3 are also reported.     

取代苯并咪唑苯氧乙酸糖酯的合成

在氢氧化钠和相转移催化剂四丁基溴化铵存在下，取代苯并咪唑苯氧乙酸与四个溴代乙酰糖（葡萄糖,半乳糖，乳糖，木糖）反应，合成了12个未见文献报道的新化合物－取代苯并咪唑苯氧乙酸糖酯，经IR，MS，^1H NMR确认了这些新糖酯的结构和构型，其中几个化合物具有一定的抗烟草花叶病毒（TMV）的活性。     

四元硫属化合物 La2CuBiS5的合成、结构及光学性能研究

通过高温固相反应合成了首例镧系-过渡金属-铋-四元硫属化合物：La₂CuBiS₅。该化合物属于正交晶系,空间群：Pnma。其结构含有沿b方向的一维[BiCuS₅^6-]_∞带,带与带之间被La³⁺离子隔开。一维[BiCuS₅^6-]_∞带由[CuS₄]四面体双链与BiS₆八面体单链通过公顶点连接而成。漫反射光谱研究表明该化合物为半导体,能隙1.30eV。理论研究表明其为直接半导体,光学能隙跃迁来源于S3p到La5d轨道的电子迁移。     

西番莲果中嘧霉胺残留的SPE-RP-HPLC降解分析

建立固相萃取-反相高效液相色谱法测定西番莲果中嘧霉胺的残留降解分析的方法.色谱柱为Shim-pack VP-ODS 150 mm×4.6 mm,流动相为甲醇:1％冰乙酸=90:10(V/V),流速为0.4 mL/min,进样量20μL.嘧霉胺在0.0760～21.20 mg/L(r=0.9964)范围内与峰面积呈良好线性关系,检出限为0.05 mg/L,嘧霉胺的回收率为85.6％～102.3％,相对标准偏差0.89％～2.7％.方法可作为西番莲果中嘧霉胺含量监测的控制方法.同时,还对嘧霉胺由西番莲果皮向西番莲果肉的迁移,在西番莲果体上的降解动态进行了测定.     

Syntheses and Crystal Structures of Two New Metal Phosphonates:[Mn(H_2O)_2(C_(12)H_8N_2)(HO_3PCH_2CH_2CO_2)] and [Co(H_2O)_4(C_(10)H_8N_2)]·(HO_3PCH_2CH_2CO_2)

By the reactions of manganese(II) acetate, 2-sulfoethylphosphonic acid, 1,10-phen (1,10-phen = 1, 10-phenanthroline) or cobalt(II) acetate, 4,4'-bipy and 2-carboxyethylphosphonic acid, two novel compounds of [Mn(H2O)2(C12H8N2)(HO3PCH2CH2CO2)] (1) and[Co(H2O)4 (C10H8N2)]· (HO3PCH2CH2CO2) (2) have been synthesized and characterized by IR spectroscopy, elemental analyses and single-crystal X-ray diffraction. Compound 1 has a 0D structure. Two Mn(II) ions are linked by two 2-carboxyethylphosphonic acid ligands, forming a centrosymmetric dimer. These dimers are further interlinked into a 2D layer structure by π-π stacking interactions and hydrogen bonds. Compound 2 has a 1D chain structure. The 2-carbo- xyethylphosphonic acid remains uncoor- dinated and acts as the organic template. By the bridge of 4,4'-bipy, the [Co(4,4'-bipy)]2+ chains are formed.