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1.
IntroductionSelf assembledinfinitecoordinationpolymersandsupramoleculeswithspecificnetworktopologieshaveattractedconsiderableattentionduetotheirpotentialap plicationsasfunctionalmaterialsaswellasfascinatingmolecularandcrystalstructures .Whilethevastmaj…  相似文献   

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2-{3-[2-(4-N,N-Di-p-tolylaminophenyl)ethenyl]phenyl}-5-(4-bromophenyl)-1,3,4-oxadiazole(1) containing triarylamine and 2,5-diaryl-1,3,4-oxadiazole units was prepared by hornerWitting reactions.The structure of the compound was confirmed by ^1H NMR,IR ,MS and elemental analyses.The crystal structure of 1 was determined by X-ray diffraction analysis.UV absorpiton spectra and photoluminescent spectra were measured.  相似文献   

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The novel alkaline metal complex Ca(BPDCH)2(1, BPDCH2 = 2,2'-bipyridine-5,5'-dicarboxylic acid) has been synthesized by the hydrothermal reaction of Ca(NO3)2·4H2O with 2,2'-bipyridine-5,5'-dicarboxylic acid. The molecular and crystal structures of complex 1 have firstly been characterized by FTIR, elemental analysis, and X-ray single-crystal diffraction. The 3D MOF structure of complex 1 was interpreted by the versatile binding modes-the intermolecular hydrogen bonds and π-π stacking interactions of 2,2'-bipyridine-5,5'-dicarboxylic acid ligand. The analysis results show complex 1 belongs to a coordination polymer with 3D MOF structure. The results of thermogravimetric analysis and solubility demonstrate complex 1 is a thermostable compound and does not dissolve in water and traditional organic solvents.  相似文献   

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Introduction The design and construction of metal-organic frameworks (MOFs), obtained by metal-directed self-assembly from labile metal centers and multidentate bridging ligands, is a rapidly developing area of su-pramolecular chemistry.1-3 Besides the aesthetic struc-tural and fascinating functional motifs, they are of in-terest both for understanding the mechanisms of the assembly process and for the host-guest chemistry asso-ciated with their large central cavities.4-13 It has been documen…  相似文献   

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杨雅莉  李牛  项寿鹤 《中国化学》2004,22(4):344-347
IntroductionLowdimensionalcompoundsgenerallyincludeone-dimensionalchain-likeandtwo-dimensionallayer-likestructures.Theyhavereceivedconsiderableattentioninrecentyearsduetotheirstructuraldiversity,interestingunusualpropertiesdifferentfromthoseofthree-dimen-sionalcompounds,possibilitytotransformtohighdi-mensionalphase,andapplicationasspecialmaterials.1-3Inthelasttwoyearsseverallowdimensionalorgani-cally-templatedphosphiteshavebeenreported.4-6[HPO3]2-canmakethreelinkstoadjacentatomsviaP-O-M(M=Z…  相似文献   

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Ferrocene and the derivatives play an important role in organometallic chemistry due to their potential novel functions and applications. Of particular interest is an electron-transfer system of ion center for molecular electronics1. Several efforts have been directed towards the design and synthesis of multi-electron redox mediators that could transfer several electrons simultaneously at the same potential2. It was reported that ferrocenylphenyl group was an excellent electron transfer mediat…  相似文献   

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A genistein derivative, 5-hydroxy-3-(4-hydroxyphenyl)-7-(2-(piperidin- 1-yl)ethoxy)- 4H-chromen-4-one 3, was designed, prepared and structurally characterized by single-crystal X-ray diffraction. X-ray structure analysis reveals that 3 crystallizes in the orthorhombic system, space group Pbca, with a = 16.238(3), b = 10.308(2), c = 22.987(5)A, V = 3847.6(13)A3, Z = 8,μ= 0.093 mm^-1, Dc = 1.317 g/cm^3, F(000) = 1616, R = 0.0789 and wR = 0.1554 for 1463 observed reflections with I 〉 2σ(I).  相似文献   

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陈三平  范广  高胜利 《化学学报》2007,65(22):2635-2638
利用小分子配合物[Cu(2-mpac)2(H2O)]•3H2O (1)作为配合物配体, 以其两侧未配位的羰基氧原子与金属配位合成了一个Cu-Cd异核配位聚合物[Cu(2-mpac)2(H2O)2Cd(H2O)4(NO3)2]n (2) (2-mpac=5-methyl-2-pyrazinecarboxylic acid), 并利用元素分析、红外光谱以及X射线单晶衍射法对标题化合物进行了表征. 晶体学数据: 三斜晶系, P-1空间群, a=0.7654(7) nm, b=0.8903(8) nm, c=0.9745(9) nm, α=116.116(1)°, β=98.408(1)°, γ=90.335(1)°, V=0.5880(9) nm3, Z=1, S=1.053, 最终残差因子[I>2σ(I)] R1=0.0280, wR2=0.0718, 对于全部数据R1=0.0305, wR2=0.0741.  相似文献   

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A novel coordination polymer, [Cu(m-BDOA)(bipy)·H2O]n (m-BDOA2-=benzene-1,3-dioxyacetate), was synthesized and characterized by elemental analysis, IR spectra, X-ray single crystal structure analysis. Crystallographic data are as follows: orthorhombic, space group Pna21, a=1.606 9(3) nm, b=1.685 9(3) nm, c=0.699 7(1) nm, V=1.8955(7) nm3, Z=4, Dc=1.619 g·cm-3, μ=1.200 mm-1, F(000)=948,R=0.038 1, wR=0.038 6. The copper atom is five-coordinated involving two oxygen atoms of different m-BDOA2- ligand, two nitrogen atoms of 2,2′-bipy ligand and one coordinated water, there is a distorted square pyramidal environment. Two copper atoms are bridged by m-BDOA2- ligand, forming a one-dimensional chain along a axis. The adjacent distance of Cu…Cu atoms is 0.877 3nm. The crystal network was formed by the intermolecular hydrogen bond and π-packing interactions.  相似文献   

13.
A novel 2D Cu coordination polymer [Cu4(pca)4(H2O)2(DMSO)2·2DMSO·2H2O]n(2, H2 pca = pyrazole-3-carboxylic acid) has been prepared by dissolving a dinuclear Cu complex Cu2(py)3(pca)2(H2O)·(H2O)(1) in DMSO solution and structurally characterized by X-ray diffraction. The polymer crystallizes in space group P1 with a = 9.538(3), b = 9.714(3), c = 10.765(3) A, α = 86.492(6), β = 84.007(7), γ = 82.592(6)o, Mr = 1079.04, V = 982.4(5) A3, Z = 1, Dc = 1.824 g/cm3, μ = 2.425 mm-1 and F(000) = 548. The final refinement gave R = 0.0785 and w R = 0.1940 for 2787 reflections with I 2σ(I). The structure of 2 consists of Cu4(pca)4(H2O)2(DMSO)2·2DMSO·2H2O units, which can be viewed as two dinuclear subunits of Cu2(pca)2(H2O)2 and Cu2(pca)2(DMSO)2 connected to each other alternately, with solvent DMSO and H2 O molecules around. The framework features a grid-like topology, with the walls of the grids composed of Cu4(pca)4 units, and the coordinated solvent molecules trapped in the grids.  相似文献   

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A novel coordination polymer of Cu II with flexible ligands,namely,[Cu 3 (mal) 2 (di2-pyridlyktone) 2 ] (1,H 2 mal=maleic acid),was synthesized and characterized by single-crystal X-ray diffraction,thermogravimetric analyses,elemental analysis and IR spectroscopy.The structure indicates that the complex crystallizes in monoclinic,space group P2 1 /c with a=10.268(2),b=17.737(3),c=8.038(1),β=98.275(2)°,V=1448.6(4) 3,Z=2,D c=1.883 Mg·m-3,μ=2.260 mm-1,F(000)=826,and the final R=0.0321 and wR=0.0820.In 1,three Cu II centers (Cu(1),Cu(2),Cu(1A)) are bridged by two uncommon μ 3-bridging H 2 mal ligands,furnishing a centrosymmetric trimetallic unit.Via further Cu-O COO coordination interactions,extention of these trimetallic units in two directions gives rise to an infinite corrugated 2D layer.In addition,thermal stability and electrochemistry of 1 were studied.  相似文献   

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在水热反应条件下合成了1种新颖的U(Ⅵ)-K异核配位聚合物[UO2K2(pdc)2(H2O)3]n(H2pdc=吡啶-2,6-二羧酸),通过元素分析、红外、紫外光谱及热重对该配合物进行了表征。单晶结构表明:配合物属于单斜晶系,C2/c空间群;晶胞参数分别为a=1.888 5(6)nm,b=1.490 0(5)nm,c=0.740 2(2)nm,β=111.104(10)°。中心铀及钾原子通过2个氮原子和6个氧原子与吡啶-2,6-二羧酸配体结合。不同的[UO2K2(pdc)2].3H2O单元通过氧原子桥联组成三维链状配位聚合物。配位聚合物中存在π…π相互作用及氢键作用。  相似文献   

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The title coordination polymer, [Co(bib)(L)].0.5H2O 1 (bib = 1,1'-(1,4-butanediyl)bis(imidazole) and L = 4,4'-oxy(bisbenzoate) has been hydrothermally synthesized and characterized by IR and single-crystal X-ray diffraction. It crystallizes in monoclinic, space group Cc with a = 8.8568(5), b = 19.936(1), c = 26.209(2) γ, y = 97.510(1)°, V= 4587.8(5) A3, Z = 8, CoC24H23N4O5.5, Mr = 514.39, Dc = 1.489 g/cm3, F(000) = 2128, μ(MoKa) = 0.795 mm^-1, R = 0.0419 and wR = 0.1002. Compound 1 exhibits a rare two-fold interpenetrating CdSO4 type topology. The O-H...O hydrogen bonds stabilize the structure of 1.  相似文献   

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0 Introduction Crystal engineering of pharmaceutical solids rep- resents a fertile and emerging research filed[1]. The im- petus for discovery of diverse crystal forms of drugs stems from the critical need to balance stability, bioavailability and other performance characteristics as well as provides valuable intellectual property pro- tection. Sulfasalazine (synonyms salazopyridine and salazosulfapyridine, abbreviated as H-SSZ) is a conju- gate of 5-aminosalicylic acid and sulfapyridine pos…  相似文献   

18.
HONG Jun 《结构化学》2008,27(5):539-542
The title complex, [Co(suc)(L)], 1 (L = 2-phenyl-lH-1,3,7,8-tetraazacyclopenta- [1]phenanthrene and H2suc = succinic acid) has been hydrothermally obtained and characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. It crystallizes in orthorhombic, space group Pcca with a = 13.936(3), b = 9.918(2), c = 28.670(6)A, V = 3962.4(14)A^3, Z = 8, CoC23H16N4O4, Mr = 471.33, Dc = 1.580 g/cm^3, F(000) = 1928,μ(MoKa) = 0.907 mm^-1, R = 0.0543 and wR = 0.1336. Compound 1 exhibits one-dimensional chain structures which are further stacked by π-π interactions to give a supramolecular layer. Finally, the N-H...O hydrogen bonds between the nitrogen atom of L and carboxylate oxygen atom stabilize the structure of 1.  相似文献   

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