2,3-吡啶二甲酸和1,4-二咪唑基丁烷构筑的Cd(Ⅱ)配合物的合成、晶体结构及荧光性质(英文)

合成了一个配位聚合物{[Cd(pdc)(bbi)]·2H2O}n(H2pdc=2,3-吡啶二甲酸,bbi=1,4-二咪唑基丁烷),利用元素分析、红外光谱和X-射线单晶衍射考察了配合物的结构。配合物中,Cd(Ⅱ)的配位数为5,每个Cd(Ⅱ)与1个吡啶二甲酸离子的1个羧基氧原子和吡啶氮原子,另1个吡啶二甲酸离子的1个羧基氧原子,以及2个1,4-二咪唑基丁烷的2个氮原子配位。吡啶二甲酸离子的配位方式可以表示为μ-(κ3N,O2∶O3),Cd(Ⅱ)与之连接形成一维骨架链[Cd(pdc)]∞。配体1,4-二咪唑基丁烷采用了"Ω"和"S"两种构型,它们进一步与中心原子配位形成三维网络结构。配合物为三重穿插的金刚石型网络结构,拓扑学符号为66。受光激发,该配合物在426 nm处有一个发射峰。     

含咪唑基配体镉配位聚合物的合成、结构及荧光性质

利用柔性含咪唑基配体1,3,5-三(咪唑-1-甲基)苯(L)与硫酸镉在溶剂热条件下反应,通过反应条件控制得到了2个配位聚合物{[Cd(L)(EG)0.5(H2O)(SO4)]·EG·H2O}n(1)和[Cd(L)(EG)(SO4)]n(2)(EG=乙二醇)。并利用元素分析、红外光谱、X射线单晶衍射等方法对其进行了表征。配合物1中配体L连接Cd(Ⅱ)形成一维链状结构,而配合物2中配体L与Cd(Ⅱ)配位形成二维网状结构,并进一步通过硫酸根桥联形成三维结构。有趣的是,EG分子在配合物1中连接链内的2个Cd(Ⅱ),而在配合物2中作为端基与1个Cd(Ⅱ)配位,硫酸根离子在1中作为端基配位,而在2中则以桥联方式连接2个Cd(Ⅱ)。研究了配合物的荧光性质及其热稳定性。     

草酸根桥联双核配合物[Cd2(phen)2ox(NO3)2·(H2O)2]的合成、结构及态密度分析

通过草酸钾(k2ox·H2O)、硝酸镉[Cd(NO3)2·4H2O]和1,10-邻菲咯啉(phen)在甲醇·水溶液中的反应合成了一种双核镉配合物[Cd2(phen)2ox(NO3)2(H2O)2],其结构经单晶X射线衍射表征.配合物属三斜晶系,P(1)空间群,晶胞参数:a=0.67629(14)nm,b=1.0051(2)nm,c=1.0527(2)nm,α=109.19(3)°,β=92.12(3)°,γ=93.48(3)°,γ=0.6733(2)nm3,Z=1,D=2.055 g/cm3,F(000)=410,μ=1.660mm-1,R=0.0445,wR=0.0877.配合物为草酸根桥联的双核镉配合物,且草酸根C-C键中点为配合物的倒反中心,镉与ox2-,phen,NO3-和水配位.运用晶体场理论计算了其态密度,结果表明NO3-和phen对配合物的性质有重要影响.     

1,3-二(4-吡啶基)丙烷Cd(Ⅱ)配合物的合成、晶体结构及发光性质研究

以1,3-二(4-吡啶基)丙烷(L)为配体,合成了一种新的Cd(Ⅱ)配合物{[CdL2(H2O)2].2(C7H6N5)}n(C7H6N5=5-(3-氨基苯基)四唑离子)。X射线单晶衍射结构分析表明该配合物为一维链状结构,Cd(Ⅱ)分别与4个1,3-二(4-吡啶基)丙烷配体的4个氮原子,2个配位水分子的氧原子形成了六配位的扭曲八面体几何构型,1,3-二(4-吡啶基)丙烷配体桥梁相邻的Cd(Ⅱ)离子形成了一维的无限延伸的链状结构,分子间通过O-H…N、N-H…N氢键作用构筑成三维超分子网络结构。     

2,5-二-(3,5-二甲基吡唑-4-巯基)-1,3,4-噻二唑-Cd(Ⅱ)配合物的合成、晶体结构及其抑菌活性

将配体Ll(2,5-二-(3,5-二甲基吡唑-4-巯基)-1,3,4-噻二唑)和L2(3,5-二甲基吡唑)同时与Cd(NO_3)_2·4H_2O进行配位反应,得到配合物[Cd(L1)_2(L2)(NO_3)_2(H_2O)],并用元素分析,FT-IR和X-射线单晶衍射进行了表征。晶体结构表明:配合物属于单斜晶系,P2_1/m空间群,每个Cd(Ⅱ)的配位环境为扭曲的五角双锥,分别与来自配体L1和L2的一个氮原子、两个硝酸根的三个氧原子、和一个水分子配位,配体L1只用一端的氮原子和Cd(Ⅱ)离子配位,配合物形成"E"字型结构。初步研究了配合物的体外抑菌活性,结果表明,配合物具有一定的抑菌活性。     

D-甘露糖肟混价铜(Ⅰ/Ⅱ)配合物的合成与配位机理

合成了D-甘露糖肟的混价四核铜配合物,通过元素分析、红外光谱、热分析和X射线光电子能谱等技术对配合物进行了表征及结构分析。结果表明,配合物分子中包含2个Cu(Ⅱ)原子和2个Cu(Ⅰ)原子,其中1个Cu(Ⅱ)与2分子配体肟基的2个N原子和2个羟基O原子配位,另1个Cu(Ⅱ)与1分子配体上的1个羟基O原子和1个解离羟基O-配位,与另1分子配体的1个羟基O原子和肟基的1个N原子配位,每个Cu(Ⅰ)与2个糖肟骨架上的2个羟基O原子和1个OH-配位,4个铜离子通过3个去质子化的配体桥连成链。OH-的加入是配合物形成的关键。     

柔性双三氮唑配体构筑的二维镉(Ⅱ)配合物的合成、结构和荧光性质

水热条件下,合成了1个镉的配位聚合物{[Cd(L)(HBTC)(H2O)]·H2O}n(L=1,2-二(1,2,4-三氮唑-1-亚甲基)苯,H3BTC=1,3,5-均苯三酸)并对其进行了元素分析,红外光谱,热重以及X射线单晶衍射分析。结构分析表明,镉中心为六配位八面体结构,赤道平面上,4个配位O原子分别来自2个HBTC2-二价阴离子和配位水,轴向上的2个配位N原子来自2个不同的L配体。该配合物是1个二维(4,4)网络结构,并进一步被分子间的O-H…O氢键作用构筑成三维超分子结构。同时研究了配合物的荧光性质。     

三嗪吡唑类配位超分子化合物的合成、结构及光催化活性

在水和乙醇的混合体系中合成了2个配位化合物[Co(Bpz*ea T)(H2O)3]·2H2BTC·2H2O(1)和[Cu(Bpz*ea T)(H2O)3]·2H2BTC·CH3CH2OH·H2O(2)[Bpz*ea T=2,4-二(3,5-二甲基吡唑)-6-二乙胺基-1,3,5-三嗪;H3BTC=均苯三甲酸].通过元素分析、红外光谱、紫外光谱、热重分析、X射线粉末衍射以及X射线单晶衍射方法对配合物进行了表征.结构分析表明,配合物1和2的中心金属均为六配位,形成扭曲的八面体构型.通过分子间氢键的作用,配合物1和2分别被连接成三维和二维的超分子结构.此外,对2个配合物的光催化活性进行了研究.     

两个由双咪唑基配体构筑的镉配合物的合成、晶体结构及理论计算

通过水热法合成了2个新的金属-有机配位聚合物[Cd(nba)_2(mbix)]_2(1)和[Cd((bib)_2Br_2]_n(2)(Hnba=4-硝基苯甲酸,mbix=1,3-双(咪唑基-1-基)苯,bib=1,4-双(咪唑基-1-基)丁烷),并对其进行了元素分析、红外光谱、荧光光谱、单晶和粉末X射线衍射测定。配合物1为零维结构,并通过π-π堆积形成了三维超分子结构;配合物2为具有(4,4)拓扑的二维网状结构。此外,还用高斯03程序PBE0/LANL2DZ方法对配合物1和2进行了自然键轨道(NBO)分析,计算结果表明配位原子与Cd (Ⅱ)离子之间存在着共价作用。     

镉/铅超分子配合物的合成、晶体结构及理论计算

通过水热法合成了2个新的金属-有机超分子配合物[Cd Cl2(L1)]n(1)和[Pb(BDC)0.5(HBDC)(L2)]·2H2O(2)(H2BDC=对苯二甲酸,L1=2-(4-氨基苯酚)-1H-咪唑并[4,5-f]菲咯啉,L2=2-(4-N,N′-二甲基苯)-1H-咪唑并[4,5-f]菲咯啉)。并对其进行了元素分析、红外光谱、热重、荧光光谱和X射线单晶衍射测定。配合物1是一维链状结构,配合物2为零维结构,它们均通过氢键和π-π堆积形成了三维超分子结构。此外,还用高斯09程序PBE0/LANL2DZ方法对配合物1和2进行了自然键轨道(NBO)分析,计算结果表明配位原子与Cd(Ⅱ)、Pb(Ⅱ)离子之间存在着共价作用。     

Synthesis, Crystal Structure and Property of a Series of Supramolecular Polymers Based on Novel 3,5-Dimethyl- 2,6-bis（3-（pyrid-2-yl）-1,2,4-triazolyl）pyridine Ligand

Solvothermal reactions of 3,5-dimethyl-2,6-bis(3-(pyrid-2-yl)-1,2,4-triazolyl) pyridine (L), 1,4-benzendicarboxylic acid (H2bdc), and transitional metal cations of MII (M = Mn, Co, Cd) in the presence of oxalic acid (H2ox) afford three novel supramolecular polymers (CPs), namely, {[M2(ox)(L)2][bdc][M2(Hox)2(OH)2(H2O)4].3H2O}n (M=Mn for 1, Co for 2, Cd for 3). Single-crystal X-ray diffraction analysis reveals that complexes 1-3 are isostructural and the 3D supramolecular structure was connected through non-covalent interactions. With the help of H2ox, the L ligands cheated with center atoms forming a butterfly [M2(ox)(L)2]2+ building block. The bdc2- ligand linked with the unprecedented [M2(Hox)2(OH)2(H2O)4] units through strong O-H…O hydrogen bonds forming a zigzag chain, which are further connected through π…π interactions between L and bdc2- ligands to form a 3D supramolecular structure. Moreover, elemental analyses, IR, thermogravimetric, PXRD and luminescence have been investigated.     

A New Two-dimensional Cd（Ⅱ） Coordination Polymer Constructed by Pyridine-2,5-dicarbohydrazide

A new two-dimensional Cd（Ⅱ） coordination polymer, [Cd（2,5-pdch）（H2O）]n·2n（ClO4）·nH2O （2,5-pdch = pyridine-2,5-dicarbohydrazide）, was prepared and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction analysis. The crystal belongs to monoclinic, space group P21/c with a = 10.905（2）, b = 11.602（1）, c = 15.034（2） A, β = 117.794 （10°, V = 1682.8（4A3, Z = 4, C7H13CdCl2NsO12, Mr = 542.52, Dc = 2.141 g/cm^3,/μ = 1.691 mm^-1, F（000） = 1072, 2（MoKa） = 0.71073A, the final R = 0.0608 and wR = 0.1329 for 2972 observed reflections with I 〉 2σ（I）. Single-crystal X-ray diffraction analysis reveals that the Cd（Ⅱ） atom displays a distorted pentagonal-bipyramidal geometry coordinated by three N atoms and three O atoms from three different 2,5-pdch ligands, and one water molecule. Interestingly, each two Cd（Ⅱ） atoms are bridged by two carbohydrazide groups of the 2,5-pdch ligands to form a dimeric unit, and such dimeric units are further connected by the 2,5-pdch ligand to generate a two-dimensional （4,4）-network.     

Racemic monoperoxovanadium(V) complexes with achiral OO and ON donor set heteroligands: synthesis, crystal structure and stereochemistry of [NH3(CH2)2NH3][VO(O2)(ox)(pic)].2H2O and [NH3(CH2)2NH3][VO(O2)(ox)(pca)

Monoperoxovanadium(V) complexes, [NH3(CH2)2NH3][VO(O2)(ox)(pic)].2H2O (1) and [NH3(CH2)2NH3][VO(O2)(ox)(pca)] (2) [NH3(CH2)2NH3 = ethane-1,2-diammonium(2+), ox=oxalate(2-), pic=pyridine-2-carboxylate(1-), pca=pyrazine-2-carboxylate(1-)], were synthesized and characterized by X-ray analysis, IR and Raman spectroscopies. The five equatorial positions of the pentagonal bipyramid around the vanadium atoms are occupied by the eta2-peroxo ligand, two oxygen atoms of the ox, and the nitrogen atom of the pic or pca ligands, respectively. The oxo ligand and the oxygen atom of pic or pca are in the axial positions. Networks of X-HO (X=C, N or O) hydrogen bonds, and pi-pi interactions between aromatic rings in and anion-pi interactions in , determine the molecular packings and build up the supramolecular architecture. Three stereochemical rules for occupation of the donor sites in two-heteroligand [VO(O2)(L1)(L2)] complexes (L1, L2 are bidentate neutral or differently charged anionic heteroligands providing an OO, NN or ON donor set) are discussed. and crystallize as racemic compounds. The 51V NMR spectra proved that the parent complex anions of and partially decompose on dissolution in water to the monoperoxo-ox, -pic or -pca complexes.     

Blue dimetallic complexes of two heavy metal ions Cd(II) and Hg(II) with an extended nitrogen donor ligand. Preparation, spectral characterization, and crystallographic studies

In methanol, the metal salts CdCl2.H2O and HgCl2 react instantaneously with the deprotonated ligand, L-, producing molecular dimetallic ink-blue complexes of general formula M2Cl2L2, M=Cd(II), (1) and Hg(II), (2) (HL=2-[2-(pyridylamino)phenylazo]pyridine). Crystal structures of these two complexes are reported. The coordination sphere around each Cd(II) ion in 1 is a distorted square pyramidal. The metal ion (Cd1) sits above the basal plane of three nitrogen atoms, N(1), N(3), and N(4). The second cadmium ion (Cd2) in this compound lies below the plane of three nitrogen atoms, N(6), N(8), and N(9). The apical positions are occupied by two Cl atoms. Secondary intramolecular interactions between the metal ions and the anionic secondary amine nitrogen atoms (N(4) and N(9)) are noted. The geometry of each Hg(II) ion in the mercury complex, Hg2Cl2L2.0.5H2O, is also distorted square based pyramid with the metal ions lying out of planes of the three nitrogen atoms of the chelating ligands. Secondary Hg(1)...N(1A) (deprotonated amine) interactions are noted. The separation between the two Hg(II) ions in this complex is within the sum of their van der Waals radii. Solution properties of these blue complexes are reported. The origin of the intense blue color in these complexes is the intraligand transitions that occur near 615 nm. 1H NMR of Hg2Cl2L2.0.5H2O indicates that it undergoes exchange in solution with the coordinated ligands.     

Synthesis and Crystal Structure of a New Complex Constructed from a Flexible Tetrapyridyl Ligand

The title complex [Cd2(NO3)2(OCH3)2(TPOM)2]·8H2O (TPOM=tetrakis(4-pyri- dyloxymethylene) methane) has been synthesized and characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction. It crystallizes in the orthorhombic crystal system Ccca with a=17.125(2), b=40.751(3), c=24.938(2) , β = 90.00o, V= 7403(3) ·3, C26H27N5O8Cd, Mr = 649.93, Z=16, F(000) = 5280, Dc = 0.992 mg/m3, μ(MoKα) =0.538 mm-1, S=1.080, the final R = 0.0533 and wR=0.1449 for 6627 observed reflections (I>2σ(I)). The crystal structure shows that each Cd atom is coordinated to four pyridyl nitrogen atoms from four TPOM ligands and each tetrahedral TPOM ligand links up four Cd atoms into a 2-fold interpenetrating 3D framework. The TG analysis shows that the framework of the title complex is stable up to 300 ℃.     

Synthesis, Characterization and Crystal Structure Determination of a Thiocyanato Bridged One-dimensional Polymeric Complex of Cadmium(Ⅱ)

A new one-dimensional polymeric complex [Cd(SCN)2(H2O)]L (L = N,N?-bis(furan- 2-ylmethylene)hydrazine) has been synthesized and characterized by IR, UV spectra, TG-DTA technique and single-crystal X-ray diffraction analysis. It crystallizes in triclinic, pace group P1 with a = 5.9268(8), b = 10.8678(15), c = 13.3671(19) , α = 109.295(2), β = 95.092(2), γ = 97.8580(10)°, V = 796.70(19) 3, Z = 2, C12H10CdN4O3S2, Mr = 434.76, μ = 1.648 mm–1, Dc = 1.812 g/cm3, F(000) = 428, R = 0.0308 and wR = 0.0769. The crystal structure reveals that the structure of [Cd(SCN)2(H2O)]n features di-μ-1,3-thiocyante bridges and 1D chains. The octahedrally coordinated Cd atom is surrounded by one oxygen atom from water molecule, three S atoms and two Natoms from five di-μ-1,3 thiocyanato bridges. The Cd atoms are connected by two di-μ-1,3 thiocyanato bridges with the Cd(1)…Cd(1A) separation of 4.239(1)  and Cd(1)…Cd(1B) of 5.852(1). In addition, the one-dimensional straight chain structure is further connected by multiform intermolecular N-H…O hydrogen bonds and π…π interactions to form a three-dimensional supramolecular structure.     

刚性配体2,2-联吡啶诱导的双咪唑金属超分子配合物的合成与晶体结构

合成了3种新的超分子配合物[Cd(H2biim)(2,2'-bipy)(NO3)2] (1), [Cu(H2biim)(2,2'-bipy)(H2O)](NO3)2 (2)和[Zn(H2biim)(2,2'-bipy)(H2O)](NO3)2 (3) (H2biim＝双咪唑; 2,2'-bipy＝2,2'-联吡啶), 并通过X射线单晶衍射测定了其结构. 配合物1～3均为单斜晶系, 属于P2(1)/c空间群, 在1中, Cd(II)为六配位, 它与双咪唑的2个氮原子, 联吡啶的2个氮原子和2个硝酸根的2个氧原子配位. 在2和3中, Cu(II)和Zn(II)均为五配位的, 它们与双咪唑的2个氮原子、2,2'-联吡啶的两个氮原子和一个水分子配位. 1～3的对称单元均通过双咪唑、硝酸根和水之间形成的氢键R21(7), R21(4) 和R44(18)构筑了1D链状超分子.     

双金属层状配位聚合物{[ML][FeⅡFeⅡ(Ox)3]·H2O}∞的合成和波谱表征

合成和表征了两种新的Schiff碱配合物[ZnL(ClO4)@4H2O(A)和CdL(ClO4)@3H2O(B)],其中L=2-{[2-(Aminomethyl-amino)-ethylimino]-methyl}-phenol.A(或B)、FeSO4@7H2O和K3[Fe(ox)3]@3H2O进一步反应,生成了配位聚合物{[ML][FeⅡFeⅢ(ox)3]@H2O}∞,其中M=Zn2+(C)或Cd2+(D).红外光谱和Mossbauer谱测定结果表明,C和D具有二维层状结构,其阴离子层由[FeⅡFeⅢ(ox)3]-单元构成.     

Metal complexes of N-benzamidoporphyrin: (N-benzimido-meso-tetraphenylporphyrinato)(methanol)zinc(II) methanol solvate and (acetato)(N-benzamido-meso-tetraphenylporphyrinato)cadmium(II) benzene solvate

The crystal structures of N-benzamido-meso-tetraphenylporphyrin (NHCOC(6)H(5)-Htpp; 1), (N-benzimido-meso-tetraphenylporphyrinato)(methanol)zinc(II) [Zn(N-NCOC(6)H(5)-tpp)(MeOH); 2(MeOH)], and (acetato)(N-benzamido-meso-tetraphenylporphyrinato)cadmium(II) [Cd(N-NHCOC(6)H(5)-tpp)(OAc); 3] were established. The coordination sphere around Zn(2+) ion in 2(MeOH) is a distorted trigonal bipyramid with N(2), N(5), and O(2) lying in the equatorial plane, whereas, for Cd(2+) ion in 3, it is a sitting-atop derivative with a distorted trigonal bipyramidal geometry in which the apical site is occupied by atoms N(2) and O(2). Cd in 3 acquires five-coordination with five strong bonds [Cd(1)-N(1) = 2.319(5) A, Cd(1)-N(2) = 2.252(5) A, Cd(1)-N(3) = 2.332(5) A, Cd(1)-O(2) = 2.292(5) A, and Cd(1)-O(3) = 2.317(5) A] and with one secondary intramolecular interaction [Cd(1)...N(4)]. The porphyrin ring in these two complexes is distorted to a large extent. The plane of the three pyrrole nitrogen atoms [i.e., N(1)-N(3)] strongly bonded to Zn(2+) in 2(MeOH) and to Cd(2+) in 3 is adopted as a reference plane 3N. For the Zn(2+) complex, the pyrrole nitrogen bonded to the benzamido (BA) ligand lies in a plane with a dihedral angle of 33.8 degrees with respect to the 3N plane, but for the Cd(2+) complex, this dihedral angle is found to be 31.4 degrees. In the former complex, Zn(2+) and N(5) are located on the different side at -0.08 and 1.39 A from its 3N plane, and in the latter one, Cd(2+) and N(5) are also located on the different side at 1.08 and -1.51 A from its 3N plane. VT NMR ((1)H and (13)C) studies of 3 show that the acetate acts as a bidentate ligand and the OAc(-) exchange does not occur in CD(2)Cl(2). Moreover, the NH proton [i.e., H(5)] of 3 in CD(2)Cl(2) is observed as a sharp singlet at delta = -1.13 ppm with Delta nu(1/2) = 4 Hz at 20 degrees C indicating that the intermolecular proton exchange between water and NH proton is rapid.     

Structural diversity within analogous compounds: syntheses and studies of M(SCH2CH2NH2)Cl (M = Zn, Cd, Hg)

The novel complexes [Zn(L)Cl] (1), [Cd(L)Cl] (2), [Hg(L)Cl] (3), {[Hg(L)Cl].NaOH.2H2O} (3.NaOH.2H2O), and {[Hg3(HL)2Cl6].2H2O} (4) (L = -SCH2CH2NH2) were prepared and investigated by means of IR spectroscopy and single-crystal X-ray diffraction. The crystal structures of 1, 2, and 3.NaOH.2H2O show chelating N,S-coordination of the cysteaminate ligand, bridging S, and terminally coordinating Cl. Apart from these common features, the coordination geometries and modes of intermolecular association are different. 1 forms a cyclic tetramer with a Zn4S4 ring, and 3.NaOH.2H2O contains one-dimensional [Hg(L)Cl]n chains with S-bridged Hg atoms. Zn and Hg atoms in 1 and 3.NaOH.2H2O are tetracoordinate with a distorted tetrahedral M(ClNS2) geometry (M = Zn, Hg). Each Cd atom of 2 binds to three S atoms and vice versa, such that layers of distorted Cd3S3 hexagons are formed. 2 is the first example for a compound exhibiting a group 12-group 16 layer structure, which can be described as an analogue of a graphite layer. Additionally, each Cd atom binds to a chlorine atom and a nitrogen atom from a cysteaminate ligand resulting in pentacoordination with a distorted trigonal bipyramidal Cd(ClNS3) geometry. 4 contains two differently coordinate Hg atoms. One displays a distorted trans-octahedral Hg(Cl4S2) geometry, while the other is coordinated by four Cl atoms and one S atom and additionally forms a long Hg...Cl contact.