共查询到20条相似文献,搜索用时 15 毫秒
1.
Haitao Zhou Kang Yang Yao Liu Yunzhi Tang Wenjuan Wei Qing Shu Jinjun Zhao Yuhui Tan 《中国化学快报》2020,31(3):841-845
We report on the synthesis of two acentric and one centrosymmetric Zn metal-organic complexes with 3-tetrazolenethyl pyridine spacers obtained in situ by hydrothermal routes.X-ray diffraction structural analysis reveals that they have the same equivalent nodes but with dissimilar topologies.The two acentric frameworks[Zn(Tzmp)Cl]n(1)and([Zn(Tzmp)Br]n(2),HTzmp=3-tetrazolemethyl pyridine)are isomorphism which exhibit an acentric 3D framework with(10,3)-b net called"ths",while the centro symmetric complex([Zn(Tzmp)N3]n(3))features a distinctive 2D sheet with Shubnikov hexagonal plane net.Photo-luminescent studies suggest the ligand-field strength of coordinated negative ions(Cl^->Br^->N3^-)has ordered adjusting effects on the emission redshift.The second harmonic generation(SHG)measurement shows that compounds 1 and 2 are nonlinear optically active,with SHG responses being 2/3 and half of the standard potassium dihvdrogen phosphate(KDP),respectively. 相似文献
2.
Hernán A. Orgueira Demosthenes Fokas Yuko Isome Philip C.-M. Chan Carmen M. Baldino 《Tetrahedron letters》2005,46(16):2911-2914
A straightforward and efficient method for the regioselective synthesis of functionalized 1,4-disubstituted [1,2,3]-triazoles, from terminal alkynes and azides, has been established utilizing Cu(0) as the source of the catalytic species. The presumed catalytic Cu(I) species is generated by the combination of 10 mol % copper nanosize activated powder and 1 equiv of an amine hydrochloride salt. The addition of an amine hydrochloride salt into the reaction mixture enhanced the dissolution of copper metal, and subsequently facilitated the formation of the Cu(I)-acetylide intermediate required for the regioselective cycloaddition. 相似文献
3.
《Acta Crystallographica. Section C, Structural Chemistry》2017,73(5):393-398
Binuclear and tetranuclear copper(II) complexes are of interest because of their structural, magnetic and photoluminescence properties. Of the several important configurations of tetranuclear copper(II) complexes, there are limited reports on the crystal structures and solid‐state photoluminescence properties of `stepped' tetranuclear copper(II) complexes. A new CuII complex, namely bis{μ3‐3‐[(4‐methoxy‐2‐oxidobenzylidene)amino]propanolato}bis{μ2‐3‐[(4‐methoxy‐2‐oxidobenzylidene)amino]propanolato}tetracopper(II), [Cu4(C11H13NO3)4], has been synthesized and characterized using elemental analysis, FT–IR, solid‐state UV–Vis spectroscopy and single‐crystal X‐ray diffraction. The crystal structure determination shows that the complex is a stepped tetranuclear structure consisting of two dinuclear [Cu2(L )2] units {L is 3‐[(4‐methoxy‐2‐oxidobenzylidene)amino]propanolate}. The two terminal CuII atoms are four‐coordinated in square‐planar environments, while the two central CuII atoms are five‐coordinated in square‐pyramidal environments. The solid‐state photoluminescence properties of both the complex and 3‐[(2‐hydroxy‐4‐methoxybenzylidene)amino]propanol (H2L ) have been investigated at room temperature in the visible region. When the complex and H2L are excited under UV light at 349 nm, the complex displays a strong blue emission at 469 nm and H2L displays a green emission at 515 nm. 相似文献
4.
Zhi Su Yong-Qing Huang Guang-Xiang Liu Man-Sheng Chen Wei-Yin Sun 《Journal of solid state chemistry》2009,182(6):1417-8554
Hydrothermal reactions of cadmium(II) or silver(I) salt, NaN3, 4-(imidazol-1-ylmethyl)benzonitrile (IBN) yield three coordination complexes, [Cd(L)2(H2O)2]·3H2O (1), [Cd3(L)5(OH)] (2) and [Ag2(L)2] (3) where HL=1-(5-tetrazolyl)-4-(imidazol-1-ylmethyl)benzene. The crystal structure analysis revealed that 1 has 1D hinged-chain structure containing 24-membered ring with a Cd···Cd intra-chain distance of 13.18 Å, while 2 is 1D ladder-like chain with Cd3O core. However, the complex 3 is a 3D 4-connected framework with Schläfli symbol of (42·63·8)(43·62·8). The L− ligand was found to show four different coordination modes in 1-3, as 2-, 3- and 4-connector, respectively. The results indicate that the coordination modes of the ligand and metal centers with different coordination geometry have great influence on the structures of the complexes. In addition, the photoluminescence of the complexes were studied in the solid state at room temperature. 相似文献
5.
A new decanuclear silver(I) compound Ag10(μ8‐S)(dtp)8 [dtp=S2P(OEt)2] was isolated from a reaction mixture containing W2S4(dtp)2 and AgN03, and its solid‐state molecular structure was determinated by X‐ray crystallography. The crystallographic study revealed that the compound contains a distorted mono‐capped quasi‐prism [Agio] with an octat‐bridging S atom at the center of the prism. The compound (C32H80Ag10O16P8S17, Mr=2592.46) crystallizes in the monoclinic P21/n space group, with a = 1.5111(5) nm, b=2.3656(8) nm, c=2.284(1) nm, β= 96.88(3)°, V=8.107(5) nm3, Z=4 and D,=2.12 g · cm?3. The solution using direct method and full‐matrix least‐squares refinement led to R=0.066, Rw=0.078 for 3928 reflections with I3σ(I). 相似文献
6.
《Journal of Coordination Chemistry》2012,65(5):499-504
A new metal-organic coordination polymer [Zn2(C2O4)2(C3N2H4)2] n (1) has been hydrothermally synthesized with ZnCl2·2H2O, oxalic acid and imidazole. The compound has a 2D network, consisting of infinite zinc(II) oxalate chains connected to each other by three-coordinate oxygen atoms. Within the chains, the zinc atoms are each octahedrally coordinated by one nitrogen atom from imidazole and five oxygen atoms from oxalate groups. Furthermore, there are two coordination modes of oxalate to zinc ions: chelate bis-bidentate and chelate/bridging bis-bidentate in compound 1, and the latter is rare among related compounds. Crystal data: monoclinic, P2(1)/c, a?=?8.4310(17), b?=?9.4060(19), c?=?8.2790(17)?Å, β?=?93.15(3)°, V?=?655.5(2)?Å3, Z?=?2, R 1?=?0.0322, wR 2?=?0.0850. 相似文献
7.
Wen-Kui Dong Peng-Fei Lan Wei-Min Zhou Yang Zhang 《Journal of Coordination Chemistry》2016,69(7):1272-1283
Two multinuclear Co(II) complexes, [{Co(L)(i-PrOH)}2Co(H2O)]?2CH3CN (1) and [{Co(L)(μ-OAc)Co(MeOH)2}2]?2CH3COCH3 (2), have been synthesized with a new asymmetric Salamo-type ligand (H3L = 6-hydroxy-6′-ethoxy-2,2′-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol). The Co(II) complexes were obtained by different solvents, and the structures are completely different. In the Co(II) complex 1, the ratio of the ligand H3L to Co(II) atom is 2 : 3 and the Co(II) ions are all five-coordinate with trigonal bipyramidal geometries. In the Co(II) complex 2, the ratio of the ligand H3L to Co(II) atom is 2 : 4. Two central Co(II) ions are six coordinate with distorted octahedral geometries and two terminal Co(II) ions are five coordinate with distorted trigonal bipyramidal geometries. Self-assembling of an infinite 1-D supramolecular chain is formed by C–H?π interactions in 1. Interestingly, an infinite 2-D-layer plane structure is formed by the self-assembling array of 2 linked by C–H?π interactions. 1 and 2 exhibit blue emissions with the maximum emission wavelengths λmax? = 403 and 395 nm when excited at 330 nm. 相似文献
8.
《Journal of Coordination Chemistry》2012,65(16):1485-1491
The mononuclear palladium(II) complex trans-[PdCl2(PhPPy2)2] (1) reacts with [Cu(CH3CN)4]ClO4 to afford the heterobinuclear [(PhPPy2)2PdCuCl2]ClO4·2CH3CN (2), bridged by two PhPPy2 ligands in a new mode. Complex 2 crystallizes in space group P21/c with a?=?12.947(1), b?=?9.142(1), c?=?33.454(2)?Å, β?=?99.698(1)°. The copper(I) and palladium(II) ions in 2 adopt distorted tetrahedral and square-planar geometry, respectively. At room temperature, the complex is photoluminescent in solution. 相似文献
9.
室温下,铜粉和2-噻吩甲酰三氟丙酮、三苯基膦在甲醇和四氢呋喃混合溶剂中反应,生成一价铜的配合物[Cu(C_8H_4F_3O_2S)(PPh_3)_2],测定了该配合物的晶体结构,结果表明,晶体属单斜晶系,P2_1/n空间群,晶胞参数:a=10.584(1),b=16.738(1),c=22.728(9)A;β=94.22(2)°,V=4015.2A3,Mr=785.29,Z=4,Dc=10299g/cm3,μ=9.86cm-1。晶体结构由直接法解出,使用块对角矩阵和全矩阵最小二乘法对原子参数进行修正,最后偏离因子R=0.048,Rw=0.054,其中4391个I>3σ(I)的可观察衍射点参加了结构修正,结果表明,Cu原子由2个O原子和2个P原子配位,形成畸变四面体构型。 相似文献
10.
Dimeric complex [Cu(SbPh3)2I]2 has been synthesized by a solid state reaction at a low heating temperature and its crystal structure has been analyzed by X-ray crystallography. The crystal is monoclinic, space group P21/a (#14), a = 20.436(5), b=14.125(3), c=24.683(3)(A), β=110.67(1)°, Z=4, V=6666(2)(A)3; C72H60Sb4I2Cu2, Mr = 1792, Dc = 1.787 g.cm-3, μ(MoKα) = 31.88 cm-1, F(000)=3440, R=0.038 and Rw=0.043 for 5632 observed reflections (I≥3.0σ(I)) and 361 refined parameters. The result reveals the copper and the bridging iodide atoms form an approximately planar rhomboid array. Effects of the bulkiness of the ligands upon the structures of the analogous complexes are discussed. 相似文献
11.
Yu-Jun Shi Shu-Jian Chen Bin Huang Xue-Tai Chen Yong Zhang Xiao-Zeng You 《Journal of Molecular Structure》2003,650(1-3):27-32
The mixed ligand mononuclear copper(I) complex of formula [CuI(PPh3)(DPPZ)]·DMF (DPPZ=dipyrido[3,2,-a:2′,3′-c]phenazine) has been synthesized and has been characterized by single-crystal X-ray diffraction method, FT-IR spectrum, the electrospray ionization mass spectrum and the thermogravimetric analysis. The pairwise π–π stacking between DPPZ ligands exists through the crystal lattice. 相似文献
12.
A new Cu(I)-dicyanamide with formula [Cu2(L)(dca)2]n (dca = dicyanamide anion, L = 1,4-bis(3-furanyl)-2,3-diaza-1,3-butadiene) has been synthesized and structurally characterized.The complex crystallizes in the monoclinic system, space group P21/n with a = 9.271(2), b = 7.7355(16), c = 11.967(3) -, β = 102.693(3)°, V = 837.3(3) -3, Z = 4, Mr = 223.68, Dc = 1.775 g/cm3, μ(MoKα) = 2.567 mm-1, F(000) = 444, R = 0.0782 and wR = 0.2582 for 951 observed reflections (I > 2σ(I)).Single-crystal X-ray analysis reveals that the copper atom is three-coordinated by two nitrogen atoms from two dicyanamide anions and another one from the ligand, and each copper atom is connected by two [N(CN)2]- anions to form an infinite double-stranded bridge fashion leading to 1D ladder-like motifs. 相似文献
13.
《Comptes Rendus Chimie》2017,20(5):534-539
We report the synthesis, characterization and crystal structure of a new mononuclear silver(I) complex, [Ag(catsc)(PPh3)2]NO3 (catsc = 3-phenylpropenalthiosemicarbazone). The complex was prepared by the reaction of catsc and AgNO3 in the presence of PPh3 and characterized by elemental analysis (CHN), FTIR, 1H, 13C and 31P NMR spectroscopy, and single-crystal X-ray diffraction. In the complex, catsc acts as a bidentate NS ligand while the nitrate is a counter ion. The silver ion is coordinated by a bidentate ligand and two PPh3 in the form of a distorted tetrahedron. In addition, the antibacterial effect of the complex was studied against the standard strains of two gram-positive (Staphylococcus aureus and Enterococcus faecalis) and two gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria. 相似文献
14.
近年来,利用晶体工程方法设计裁剪和组装具有一维、二维、三维框架结构的固体化合物材料已成为材料科学和化学学科中最活跃的研究领域之一。研究表明在这些框架内镶嵌活性组分可得到新型功能材料,如磁性材料、非线性光学材料及新型催化剂等[1]。而叠氮根是一个多功能桥联配体,它能形成一维[2],二维[3],三维[4]等配合物,有关叠氮根的磁性研究也成为分子基铁磁体研究的一个重要方面[5]。本文报道了[Cu(AFO)2(N3)2](DMF)(H2O)(DMF=N,N 二甲基甲酰胺)配合物的合成和晶体结构,并进行了元素分析和红外光谱表征。1 实验部分1 1 试剂与… 相似文献
15.
Shubhamoy Chowdhury Arnab Bhattacharya Pinki Saha Smita Majumder E. Suresh 《Journal of Coordination Chemistry》2016,69(24):3664-3676
Employing 1-(2-methoxybenzyl)-2-(2-methoxyphenyl)-1H-benzimidazole (bpb) as a monodentate ligand, a new greenish-blue copper(II) complex, [Cu(bpb)2(NO3)2] (1a), has been synthesized. 1a has been characterized analytically and spectroscopically. The X-ray crystal structure of 1a reveals that it adopts a cis disposition with respect to the ligands. The solid state structure of 1a is stabilized by intramolecular offset face-to-face π–π stacking. Non-covalent supramolecular edge-to-face C–H?π interactions with neighboring molecules give 1-D supramolecular chains that further lead to the formation of an assembled 3-D supramolecular metal-organic framework via hydrogen bonding interactions. 1a shows blue fluorescence most likely due to intramolecular offset face-to-face π–π stacking. At room temperature, 1a is one-electron paramagnetic. It shows a rhombic EPR spectrum with g1 = 2.12, g2 = 2.42, and g3 = 2.52 in the solid state at liquid nitrogen temperature. In cyclic voltammetry, 1a displays a one-electron oxidative Cu(II)/Cu(III) couple. Our DFT calculations, corroborate the observed experimental results of 1a. 相似文献
16.
1INTRODUCTIONCoppercomplexesarewidelyusedascatalystsinthedecompositionofdisubsti-tutedperoxides"'-Theelectronicstructureandbondingatthecatalystscanbeprof-itablypursuedbystudyingmodelcomplexes.Generally,theCu(I)complexesareob-tainedbyreactionofCu(l)saltswithligands.Wereporthereamethodofpreparingcopper(I)complexbythereactionofCupowderwith2-thenoyltrifluoroacetone,2,2'-bipyinmethanol.2EXPERIMENTALReactionwascarriedoutundernitrogenatmosphere.2,2-bipy(1mmol)wasaddedtoamixtureof2-thenoyl… 相似文献
17.
《Journal of Coordination Chemistry》2012,65(11):909-914
A new complex, [Cu(imme2py)2](ClO4) (imme2py?=?2-(2′-(6′-methylpyridyl))-4,4,5,5-tetramethyl-1H-imidazolyl-1-oxyl) has been synthesized and structurally characterized by X-ray diffraction methods. It crystallizes in the orthorhombic crystal system, space group P 212121 . The structure consists of [Cu(imme2py)2]+ cations and chloride anions. The coordination geometry about Cu(I) is tetrahedral with the four coordination sites being occupied by four nitrogen atoms. Magnetic measurements show intramolecular antiferromagnetic interactions between the imino nitroxides. 相似文献
18.
Synthesis and Structure of Copper(I)Chalcogenolate-2,2′-Bipyridine Complexes [CuS(2,4,6-iPr3C6H2)]4(Bipy)2 and [CuSe(2,4,6-iPr3C6H2)]2(Bipy)2 The oligomeric homoleptical copper(I) chalcogenolate compounds [CuS(2,4,6-iPr3C6H2)]x=4,8 and [CuSe(2,4,6-iPr3C6H2)]6 react with 2,2′-bipyridine (Bipy) to yield the tetranuclear complex [CuS(2,4,6-iPr3C6H2)]4(Bipy)2 ( 4 ) and the dinuclear complex [CuSe(2,4,6-iPr3C6H2)]2(Bipy)2 ( 5 ). The structures of 4 and 5 were determined by X-ray analysis. In the eight-membered Cu4S4 core of 4 with chair conformation the copper atoms are linked by μ2-bridging selenolate ligands. Only two copper atoms are coordinated by 2,2′bipyridine. The corresponding copper(I) selenolate complex ( 5 ) forms a folded four-membered Cu2Se2 ring with μ2-bridging selenolate ligands. The Cu? Cu distance of 2.52 Å is relatively short. In contrast to the reaction performed with 2,2′-bipyridine, addition of phenantroline to 1 respectively 2 yields a dinuclear complex [CuS(2,4,6-iPr3C6H2)]2(Phen)2 ( 10 ). NMR spectroskopic and cryoscopic measurement of 4 show that this complex dissociates into smaller fragments in solution which undergo rapid exchange reactions. However, corresponding investigations performed on 5 indicate that the solid state structure is maintained in solution. The electrochemical behaviour of 4, 5 and 10 was studied in CH2Cl2 and in any case no reversible redox processes could be observed. 相似文献
19.
1INTRODUCTION Atom transfer radical addition is an efficient me-thod for carbon-carbon bond formation in organic synthesis[1,2].In some of these reactions,a transi-tion-metal catalyst acts as a carrier of the halogen atom in a reversible redox process.The transition-metal-catalyzed has been successfully used to con-trol radical polymerization[3].In the process,the transition-metal species initially abstracts halogen atom X from organic halide to form oxidized species and carbon-centered r… 相似文献
20.
Z. G. Bazhanova Yu. I. Tarasov D. M. Kovtun A. I. Boltalin B. K. Novosadov I. V. Kochikov 《Journal of Structural Chemistry》2008,49(5):810-817
The results of B3LYP quantum-chemical calculations of the equilibrium structures of [(CX3COOCu)2]3, [(CX3COOCu)2]2, and (CX3COOCu)2 oligomers (X = H, F) using the cc-pVTZ correlation-consistent basis for C, O, and F atoms and the Stuttgart 1997 RSC basis and relativistic effective core potential for Cu(I) atoms are presented. The differences in the structures of the free dimer and dimer units in oligomers were studied. The hexamer structure was chosen as the model of a fragment of the crystalline phase. Good agreement was obtained between the experimental and calculated differences between the geometrical parameters of the structures in the “gas phase-crystal” and “acetate-trifluoroacetate” series. Based on the calculated data, the increase in the Cu(I)-Cu(I) bond length in the silver acetate crystal compared with the gas phase can be explained by the effect of the neighboring dimer units of the polymer ribbon, while the increase in the Cu(I)-Cu(I) bond length in gaseous trifluoroacetate compared with acetate, by the acceptor effect of fluorine atoms. 相似文献