[Zn2(C7H8O6)2(bipy)2(H2O)2]·4H2O手性配位聚合物的合成与晶体结构

采用溶剂热技术合成了一种新型手性配位聚合物[Zn2(C7H8O6)2(bipy)2(H2O)2]·4H2O(C7H8O6=2,3-氧-异丙叉基-L-酒石酸根, bipy=4,4'-联吡啶), 并通过单晶X射线衍射结构分析、元素分析、热重分析以及红外光谱进行了表征. 结构分析数据表明, 该化合物属单斜晶系, C2空间群, 晶胞参数a=2.02334(14) nm, b=1.13896(4) nm, c=1.01094(6) nm, β=117.366(3)°, V=2.0689(2) nm3. 两个晶体学独立的Zn原子均为八面体构型, 其中Zn1原子赤道配位点被2个酒石酸根中的4个羧酸根氧螯合配位, 2个酒石酸根中剩下的4个羧酸根氧中的2个分别与2个Zn2原子连接形成无限一维链, Zn2原子的另外2个反式赤道配位点被2个水分子氧占据, 同时这两种Zn原子的轴向配位点均被4,4'-联吡啶的氮原子占据, 形成具有矩形格子[0.51165(3) nm×1.13896(5) nm]的二维层状结构, 游离的2个水分子通过氢键作用形成二聚体, 并与酒石酸根中未与Zn配位的羧酸氧连接, 把二维层状结构连接成三维网状的超分子结构.     

多孔配位聚合物[Cu_(1.14)(mal)_(1.14)(4,4′-bipy)_(0.57)(H_2O)_(1.14)]_∞的合成及其晶体结构

以4,4′-联吡啶(4,4′-bipy),丙二酸(H2mal)和氧化铜为原料,在DMSO-H2O中合成了多孔配位聚合物{[Cu1.14(mal)1.14(4,4′-bipy)0.57(H2O)1.14]∞, 1},其结构经IR和X-射线单晶衍射表征.1属四方晶系,P421c空间群,晶胞参数为: a=16.357 7(7)(A), b=16.357 7(7)(A), c=7.575 5(7)(A), V=2 027.0(2)(A)3, Z=7, Dc=1.715 g·cm-3, S=1.148, Mr=299.08, F(000)=1 056, μ=2.155, △ρ=0.743 e·-3～-0.155 e·-3.最终偏离因子R1=0.020 5, wR2=0.057 4. 1中每个铜(Ⅱ)原子与4,4′-bipy的一个氮原子,两个丙二酸根的3个氧原子和一个水分子的氧原子配位,形成畸变的CuNO4四方锥结构单元.CuNO4四方锥通过4,4′-bipy和丙二酸根桥联形成二维的四方网状结构,层与层之间通过分子间氢键交错平行堆积形成三维多孔配位聚合物.     

三维多孔配位聚合物{[Zn2(mal)2(4,4''-bipy)(H2O)2]·2(H2O)0.25}∞(mal=丙二酸根)的合成、结构及性质研究

ZnO,丙二酸及4,4'-bipy按物质的量之比1∶3∶0.3溶于H2O和DMF混合溶剂中(体积比4∶1),形成的无色溶液在50℃反应3d,得到了标题化合物{[Zn2(mal)2(4,4'-bipy)(H2O)2]?2(H2O)0.25}∞(mal=丙二酸根),对其进行了元素分析、红外光谱和X射线衍射表征,测定了晶体结构.该聚合物属单斜晶系,P21/n空间群,a=0.71215(16)nm,b=1.8685(4)nm,c=0.73890(17)nm,β=91.486(5)°,V=0.9829(4)nm3,Z=4,Dc=1.811g/cm3,Mr=268.03,F(000)=542,μ=25.02cm-1.最终偏离因子R1=0.0499,wR2=0.1374.该化合物中Zn原子和三个丙二酸根中的4个O原子、一个水分子和4,4'-bipy的一个N原子配位,形成的ZnNO5八面体通过4,4'-bipy和丙二酸根桥联,组成一种新颖的三维多孔结构,其孔道中充填游离水分子.此外还研究了该聚合物的热性质.     

(—)-2,2'-(2,5-噻吩二甲酰氨基)二丙氨酸和4,4'-联吡啶构筑的铕配位聚合物的水热合成、晶体结构及性质研究

以(—)-2,2'-(2,5-噻吩二甲酰氨基)二丙氨酸(C12H14N2O6S)及4,4'-联吡啶(4,4'-bipy)为配体,在水热条件下合成了铕配位聚合物{[Eu2(C12H12N2O6S)3(4,4'-bipy)(H2O)2]· (H2O)6}n.通过X-射线单晶衍射仪测定其结构,结果表明:晶体为正交晶系,晶胞参数a=1.113992(18) nm,b=1.804 972(19) nm,c=2.933 80(3) nm,Z=4;2个Eu原子分别为九和八配位.测定发现配合物固体具有Eu3+的典型光致发光光谱,配合物中配体能有效提高稀土离子的发光效果.并通过热重分析对配合物进行了热稳定性研究.     

两个金属铜配位聚合物Cu3(2,2′-bipy)2(C8H4O4)2(C8H5O4)2和Cu(Ⅰ)Cu(Ⅱ)(4,4′-bipy)1.5(C8H4O4)(C8H5O4)混合溶剂热合成及结构与性能研究

在中温混合溶剂热条件下合成了两个金属铜配位聚合物Cu3(2,2′-bipy)2(C8H4O4)2(C8H5O4)2和Cu(Ⅰ)Cu(Ⅱ)(4,4′-bipy)1.5(C8H4O4)(C8H5O4)(bipy=联吡啶,C8H4O4=1,3-间苯二甲酸),并对其进行了单晶结构解析及相关性能表征.配合物Cu3(2,2′-bipy)2(C8H4O4)2(C8H5O4)2(1)晶体属三斜晶系,P1空间群,a=1.03314(4)nm,b=1.08350(3)nm,c=1.15826(4)nm,α=83.104(2)°,β=84.609(2)°,γ=66.125(2)°,Z=1.配合物Cu(Ⅰ)Cu(Ⅱ)(4,4′-bipy)1.5(C8H4O4)(C8H5O4)(2)晶体属三斜晶系,P1空间群,a=1.06979(3)nm,b=1.09209(3)nm,c=1.47887(3)nm,α=91.795(2)°,β=93.2460(10)°,γ=118.6170(10)°,Z=2.通过使用不同的有机碱配体(2,2′-联吡啶和4,4′-联吡啶),并调节不同有机碱配体的用量,得到了结构不同的两个目标晶体产物相.产物均可稳定到3...     

一个新的二维配位聚合物:{Cu_2[C_(10)H_8Cl_2NO_4]_2[C_(10)H_8N_2]_3}_n的合成及其晶体结构

采用铜(Ⅱ)盐和3,5-二氯水杨醛缩丝氨酸以及4,4′-联吡啶在乙醇水溶液中合成了具有二维层状的配位聚合物.通过元素分析、红外光谱对该配位聚合物进行了表征,并利用X射线单晶衍射仪对其结构进行了鉴定.晶体结构表明,该标题配合物属三斜方晶系,空间群C2/c,晶胞参数为a=2.711(3)nm,b=2.711(3)nm,c=4.977(5)nm;α=90.00°,β=90.00°,γ=120.00°,V=3.167 8 nm3,Z=18,Dc=1.173 g.cm-3,F(000)=11 448,μ=0.807 mm-1,R1=0.078 8,wR2=0.187 2.     

配合物Cu(pico)(4,4′-bipy)(H2O)ClO4·H2O的合成及其晶体结构

利用水热法合成了新型一维配合物Cu(pico)(4,4′-bipy)(H2O)ClO4·H2O(1,bipy=联吡啶,pico=邻吡啶甲酸根),其结构经IR,元素分析和X-射线单晶衍射表征.1属于单斜晶系,P21/n空间群,晶胞参数:a=0.853 57(8)nm,b=1.610 58(14)nm,c=1.416 85(13)nm,β=99.407(2)°,V=1.921 6(3)nm3,Z=4,Mr=477.31 g·mol-1,Dc=1.650 g·cm-3,μ=1.326mm-1,F(000)=972,R1=0.078 1,wR2=0.239 1,S=1.102.1中Cu2 与邻吡啶甲酸配体上一个N原子和一个O原子、两个4,4′-联吡啶的N原子以及一个水分子的O原子配位,形成了四方锥配位几何构型.在a c轴方向,Cu2 与两个4,4′-联吡啶分子经桥联作用形成一维zig-zag链;链与链通过氢键形成三维结构.     

[Ag(4,4′-bpy)]~+及[Zn(phen)_2(H_2O)_2]~(2+)两种配合物的合成、结构与荧光性质

用水热法和溶液法分别合成了2个新的配合物{[Ag(4,4′-bpy)]·3-HSBA.H2O}n(1)和[Zn(phen)2(H2O)2]·(A-2,5-DSA)·3H2O(2)(3-HSBA=3-羧基苯磺酸根,A-2,5-DSA=苯氨-2,5-二磺酸根,4,4′-bpy=4,4′-联吡啶,phen=1,10-邻菲咯啉),用X-射线单晶衍射结构分析方法测定了其晶体结构。配合物1是一维链状结构。在1个不对称单元中包含1个[Ag(4,4′-bpy)]+阳离子,1个3-羧基苯磺酸根阴离子和1个晶格水分子。Ag髣离子与2个4,4′-联吡啶的2个氮原子配位。配合物2是单核结构。在1个不对称单元中包含1个[Zn(phen)2(H2O)2]2+阳离子,1个苯氨-2,5-二磺酸根阴离子和3个晶格水分子。Zn髤离子与2个1,10-邻菲咯啉的4个氮原子和2个水氧原子配位。配合物1和2中,配位阳离子、抗衡阴离子以及晶格水分子之间存在丰富的氢键,进而构筑成超分子网络结构。配合物的荧光均来自于配体的π-π*电子跃迁。     

(-)-2，2′-(2，5-噻吩二甲酰氨基)二丙氨酸和4，4′-联吡啶构筑的铕配位聚合物的水热合成、晶体结构及性质研究

以(-)-2,2′-(2,5-噻吩二甲酰氨基)二丙氨酸(C12H14N2O6S)及4,4′-联吡啶(4,4′-bipy)为配体,在水热条件下合成了铕配位聚合物{[Eu2(C12H12N2O6S)3(4,4′-bipy)(H2O)2].(H2O)6}n。通过X-射线单晶衍射仪测定其结构,结果表明:晶体为正交晶系,晶胞参数a=1.113 992(18)nm,b=1.804 972(19)nm,c=2.933 80(3)nm,Z=4;2个Eu原子分别为九和八配位。测定发现配合物固体具有Eu3+的典型光致发光光谱,配合物中配体能有效提高稀土离子的发光效果。并通过热重分析对配合物进行了热稳定性研究。     

硅钨酸盐[H_2bpy][H_2bbpy][α-SiW_(12)O_(40)]·2H_2O的合成与结构表征

以Na10[A-α-SiW9O34].18H2O、CuCl2.2H2O、EuCl3、联咪唑、4,4′-联吡啶为原料,利用水热法合成了有机-无机复合Keggin结构硅钨酸盐[H2bpy][H2bbpy][α-SiW12O40].2H2O[bpy=4,4′-bipyridine,bbpy=N-(2-(4,4′-bipyridyl))-4,4′-bipyridine],并借助元素分析、红外光谱和X射线单晶衍射对其组成和结构进行了表征.结果表明,标题化合物属于单斜晶系,P2(1)/c空间群,晶胞参数为:a=1.149 92(13)nm,b=2.137 6(3)nm,c=2.248 2(3)nm,β=98.406(2)°,V=5.466 7(111)nm3,Z=4,Dc=4.109g/cm3,GOOF=1.038,R1=0.057 5,wR2=0.118 4.其分子由1个饱和的硅钨酸盐[α-SiW12O40]4-阴离子,1个游离的双质子化[H2bbpy]2+阳离子,1个游离的双质子化[H2bpy]2+阳离子和2个结晶水分子组成.值得指出的是,4,4′-联吡啶分子在水热条件下发生反应,形成N-(2-(4,4′-联吡啶基))-4,4′-联吡啶.     

脂肪酸铕配合物/PMMA的合成及发光性能

以一定比例正辛酸和月桂酸为第一配体,通过皂化法合成了脂肪酸铕配合物,并溶于甲基丙烯酸甲酯(MMA)单体通过本体聚合得到了含脂肪酸铕的PMMA光致发光聚合物材料AxByEu/PMMA(A为正辛酸根,B为月桂酸根,x、y分别表示正辛酸和月桂酸的摩尔比). 考察了不同的第二配体(咔唑、二甲基-联吡啶、邻菲罗啉、噻吩甲酰三氟丙酮HTTA)对脂肪酸铕聚合物发光性能的影响,选择出合适的第二配体HTTA,合成了A3Eu/HTTA/PMMA聚合物. 通过红外光谱、紫外光谱及荧光光谱测试技术对配合物及聚合物的结构和荧光性能进行表征. 结果表明,合成的含脂肪酸铕配合物及其聚合物均具有很好的光致发光性能,紫外激发能发射Eu3+离子的特征红光. 当HTTA的质量分数减小至MMA的0.02%时,仍能很好地促进体系的发光,且不影响聚合物本身的透明性.     

One‐dimensional Cadmium(II) Coordination Polymers: Syntheses and Crystal Structures of [Cd(H2O)3(C5H6O4)]·2H2O,Cd(H2O)2(C6H8O4), and Cd(H2O)2(C8H12O4)

[Cd(H₂O)₃(C₅H₆O₄)]·2H₂O ( 1 ) and Cd(H₂O)₂(C₆H₈O₄) ( 2 ) were prepared from reactions of fresh CdCO₃ precipitate with aqueous solutions of glutaric acid and adipic acid, respectively, while Cd(H₂O)₂(C₈H₁₂O₄) ( 3 ) crystallized in a filtrate obtained from the hydrothermal reaction of CdCl₂·2.5H₂O, suberic acid and H₂O. Compound 1 consists of hydrogen bonded water molecules and linear {[Cd(H₂O)₃](C₅H₆O₄)_2/2} chains, which result from the pentagonal bipyramidally coordinated Cd atoms bridged by bis‐chelating glutarato ligands. In 2 and 3 , the six‐coordinate Cd atoms are bridged by bis‐chelating adipato and suberato ligands into zigzag chains according to {[Cd(H₂O)₃](C₅H₆O₄)_2/2} and {[Cd(H₂O)₂](C₈H₁₂O₄)_2/2}, respectively. The hydrogen bonds between water and the carboxylate oxygen atoms are responsible for the supramolecular assemblies of the zigzag chains into 3D networks. Crystallographic data: ( 1 ) P1¯ (no. 2), a = 8.012(1), b = 8.160(1), c = 8.939(1) Å, α = 82.29(1)°, β = 76.69(1)°, γ = 81.68(1)°, U = 559.6(1) ų, Z = 2; ( 2 ) C2/c (no. 15), a = 16.495(1), b = 5.578(1), c = 11.073(1) Å, β = 95.48(1)°, U = 1014.2(1) ų, Z = 4; ( 3 ) P2/c (no. 13), a = 9.407(2), b = 5.491(1), c = 11.317(2) Å, β = 95.93(3)°, U = 581.4(2) ų, Z = 2.     

Group 2 metal salts of pyromellitic acid: [Mg(H2O)6](C10H4O8) and [Ba(C10H4O8)(H2O)5]

Structural determinations of the magnesium(II) and barium(II) salts of pyromellitic acid (benzene‐1,2,4,5‐tetra­carboxyl­ic acid) are presented. Hexa­aqua­magnesium(II) benzene‐1,2,4,5‐tetra­carboxyl­ate(2−), [Mg(H₂O)₆](C₁₀H₄O₈), (I), and penta­aqua­[benzene‐1,2,4,5‐tetra­carboxyl­ato(2−)]­barium(II), [Ba(C₁₀H₄O₈)(H₂O)₅], (II), are both centrosymmetric and both possess a 1:1 metal–ligand ratio, but the two structures are found to differ in that the magnesium salt contains a hexaaqua cation and possesses only hydrogen‐bonding interactions between cations and anions, while the barium salt exhibits coordination of the carboxyl­ate ligand to the nine‐coordinate metal centre. In (I), both ions sit on a 2/m site symmetry, and in (II), the cation and anion are located on m and i site symmetries, respectively.     

脂肪酸铕配合物聚合物材料的合成及发光性质

以一定比例正辛酸和月桂酸为第一配体,通过皂化法合成了脂肪酸铕配合物,并溶于甲基丙烯酸甲酯（MMA）单体通过本体聚合得到了含脂肪酸铕的PMMA光致发光聚合物材料AxByEu/PMMA（其中A=正辛酸根,B=月桂酸根,x、y分别表示正辛酸和月桂酸的比例）。考察了不同的第二配体（咔唑、二甲基-联吡啶、邻菲罗啉、噻吩甲酰三氟丙酮HTTA）对脂肪酸铕聚合物发光性能的影响,选择出合适的第二配体HTTA,进而合成了A3Eu/HTTA/PMMA聚合物。通过红外光谱、紫外光谱及荧光光谱对脂肪酸铕配合物及聚合物的结构和荧光性能进行表征。结果表明：合成的脂肪酸铕配合物及其聚合物均具有很好的光致发光性能,紫外激发能发射Eu3+离子的特征红光。当HTTA的质量分数减小至0.02%时,仍能很好地促进体系的发光,且不影响聚合物本身的透明性。     

Topological evolution in uranyl dicarboxylates: synthesis and structures of one-dimensional UO2(C6H8O4)(H2O)2 and three-dimensional UO2(C6H8O4)

Two novel uranyl adipates are reported as synthesized via hydrothermal treatment of uranium oxynitrate and adipic acid. One-dimensional UO(2)(C(6)H(8)O(4))(H(2)O)(2) (1) [a = 9.6306(6) A, c = 11.8125(10) A, tetragonal, P4(3)2(1)2 (No. 96), Z = 4] consists of chains of (UO(2))O(4)(H(2)O)(2) hexagonal bipyramids tethered through a linear adipic acid backbone. Three-dimensional UO(2)(C(6)H(8)O(4)) (2) [a = 5.5835(12) A, b = 8.791(2) A, c = 9.2976(17) A, alpha = 87.769(9) degrees, beta = 78.957(8) degrees, gamma = 81.365(11) degrees, triclinic, P1 (No. 2), Z = 2] is produced by decreasing the hydration level of the reaction conditions. This structure contains a previously unreported [(UO(2))(2)O(8)] building unit cross-linked into a neutral metal-organic framework topology with vacant channels.     

Novel example of a chain structure formed by 1,4-dioxane and cobalt(II) links. Chain [Co3(mu-OOCCF3)4(mu-H2O)2(OOCCF3)2(H2O)2(C4H8O2)].2C4H8O2

The trimer [Co3(mu-OOCCF3)4(mu-H2O)2(OOCCF3)2(H2O)2(C4H8O2)].2C4H8O2. (1) is composed of three tetragonally distorted Co(II) centers bridged by four trifluoroacetates and two bridging water molecules. 1,4-Dioxane is coordinated at a distance of 2.120(3) A from the terminal cobalt Co2; the remaining oxygen of this 1,4-dioxane links the terminal cobalt to a neighbor trimer, forming a one-dimensional chain. The crystal structure displays a network of hydrogen bonds between four noncoordinated 1,4-dioxane molecules and the coordinated terminal water molecules. The magnetic properties of 1 were analyzed with the use of the Hamiltonian including isotropic exchange interactions between real spins of a high-spin Co(II), spin-orbit coupling and a low-symmetry crystal field acting within the (4)T(1g) ground manifold of each cobalt ion. A weak antiferromagnetic exchange interaction between cobalt ions in 1 was found. The results of the magnetic model are in good agreement with the experimental observations.