Cu4簇合物“元件组装”合成及其结构与电催化作用

以元件组装方法合成了Cu₄(HL)₄·2H₂O簇合物(H₂L=N-乙氧羰基-N’-o-硝基苯基硫脲)。用X射线单晶衍射技术、核磁共振谱、红外光谱和元素分析等确定了簇合物及其相应组装元件的晶体结构和化学组成,并对簇合物的电催化性质进行了检测。结果表明,该簇合物由4个Cu(Ⅰ)以M-M键构成簇核,4个硫脲配体分别以硫羰基硫原子和氮原子配位于Cu(Ⅰ)构成簇合物配位结构,DPV分析显示该簇合物对O₂具有较高催化活性。     

四核铜簇合物[Cu4(Pyims)4]·4H2O·4CH3OH的合成、晶体结构及电催化性能

室温下以4-（3-吡啶基）-2-巯基咪唑(PyimsH)和Cu(ClO4)2·6H2O为原料,在甲醇介质中制备了四核铜簇合物单晶[Cu4(Pyims)4]·4H2O·4CH3OH。 该簇合物属四方晶系,I41/a空间群。 4个亚铜中心离子构成1个变形四面体,4个Pyims-配体以咪唑环上的N原子和巯基上的S原子与亚铜离子配位,其中S原子以桥基形式同时与2个亚铜离子配位。 相邻簇合物分子通过配体Pyims-吡啶环上N3及C7之间的氢键交互作用,构筑成三维网状结构。 采用简单的滴涂法将该簇合物修饰于玻碳电极表面,簇合物对O2气还原有良好的电催化活性,具有作为燃料电池电极材料的潜质。     

簇合物[WOS3Cu3(γ-pic)6]Br的合成和晶体结构

簇合物[WOS3Cu 3(γ-pic)6]Br(C36H42BrON6S3Cu3W,M,=1125.34)属于三方晶系,空间群为P3,晶胞参数为:a=12.264(5),c=15.905(8)A,γ=120.00°,V=2071(2)A3,μ(MoKα)=5.490mm-1,Z=2,Dc=1.804g/cm3,F(000)=1104,R=O.052,wR=O.053.可观察衍射点1901(I≥2σ(I)).该簇合物的分子由游离的阴离子Br-和簇阳离子[WOS3Cu3(γ-pic)6]+构成.阳离子中的W原子、S原子和Cu原子构成1个巢状骨架结构,且该结构中存在一个通过W和O原子的C3轴.     

含有二维有序水层的癸二酸锌(Ⅱ)、钴(Ⅱ)超分子配合物的构筑

室温下,在醇水溶液中合成了2个新型配合物,[Zn(phen)3]2·[Zn(C10H16O4)·(H2O)3]·(C10H16O4)2·20H2O(C10H18O4=癸二酸)(1)和[Co(phen)3]2·[Co(H2O)6]·(C10H16O4)3·30H2O(2),并对配合物进行了元素分析分析、红外光谱分析、热重分析以及晶体结构研究.配合物(1)的基本结构单元中含有一个电中性配位单元[Zn(C10H16O4)·(H2O)3]、二个配位阳离子[Zn(phen)3]2+、二个游离的癸二酸根和20个晶格水.Zn原子有两种配位模式,在[Zn(phen)3]2+配位单元中Zn原子与三个邻菲啰啉的六个N原子配位,构成略有畸变的八面体,Zn原子位于八面体的对称中心;在[Zn(C10H16O4)·(H2O)3]配位单元中Zn原子采取五配位的三角双锥构型,两个羧基均采取单齿配位,同一个癸二酸根与相邻的不同Zn原子配位,将相邻的[Zn(C10H16O4)·(H2O)3]配位单元连接起来,自组装得到了无限链状结构.配合物以癸二酸根为模板在ab平面形成了有序水层,该水层由5元,6元水簇,以及其他由羧基参与的各元环组成.与一般常见的6元水簇不同,配合物1中的6元水簇采取了高能量的类似苯环的平面构象.配合物(2)的基本结构单元中含有一个[Co(H2O)6]2+配位阳离子、二个[Co(phen)3]2+配位阳离子、三个游离的癸二酸根和30个晶格水.Co原子也有两种配位模式.在[Co(phen)3]2+配位单元中,Co原子与三个邻菲啰啉的六个N原子配位,构成略有畸变的八面体,Co原子位于八面体的对称中心.在[Co(H2O)6]2+配位单元中Co(II)与6个配位水的氧原子配位,6个配位水中的6个原子和Co(Ⅱ)形成八面体结构.通过水分子之间及水分子和羧基阴离子间的氢键形成了二维有序水层,二维水层中最小的构筑基元为6元环的水,最大的构筑基元为16元环水,每个水环中分别含有6个和16个游离的没有配位的水分子,水分子之间通过很强的氢键作用形成环形的超分子水簇.这些基元片断在二维空间扩展开来,形成二维有序水层.有趣的是,在该水层上通过水分子之间的分子间氢键形成了16元大环水簇,它与两端的六元环共用六条边,每一个16元水环中含有16个游离的没有配位的水分子,水分子之间通过氢键作用形成环形超分子水簇,每个水分子同时作为氢键的给体和受体.[Co(H2O)6]2+和四个羧酸根离子位于十六元环水的中心,与其周围的游离水分子形成了十二个氢键,同时与环外的游离水和羧酸根形成了十个氢键,对大环水聚集体起到稳定作用.     

3-乙基-2-乙酰吡嗪缩4-甲基氨基硫脲Cu(Ⅱ)配合物的合成、结构和DNA结合性质（英文）

合成并通过单晶衍射、元素分析、红外光谱表征了配合物[Cu(L)Br]·DMF (1),[Cu(L)Cl]·2H2O (2)和[Cu2(L)2(SO4)]·H2O·CH3OH (3)的结构(HL为3-乙基-2-乙酰吡嗪缩4-甲基氨基硫脲)。单晶衍射结果表明,配合物1和2中的Cu(Ⅱ)离子与来自1个缩氨基硫脲阴离子配体的N2S给体及1个卤素阴离子配位(1和2中分别为溴离子和氯离子),采取扭曲的平面正方形配位构型。而双核配合物3中,2个Cu(Ⅱ)中心由2个缩氨基硫脲配体的2个硫原子桥联形成Cu2S2簇,Cu…Cu距离为0.318 0 nm。每个Cu(Ⅱ)离子还与来自同一缩氨基硫脲配体的2个氮原子和处于外轴向位置η2-SO42-的1个氧原子配位,配位构型为扭曲的四方锥。此外,荧光光谱结果表明,配合物与DNA的相互作用强于配体。     

二茂铁基苯甲酸铜(Ⅱ)双核簇合物的合成、晶体结构及电化学性质

合成了一个结构新颖的二茂铁基苯甲酸铜的双核簇合物([(p-FcC6H4COO)2Cu(DMF)].2H2O.DMF)2,通过X射线单晶衍射分析、元素分析、IR光谱、UV光谱及循环伏安等手段对标题簇合物的结构和性质进行了测试和表征.在双核簇合物分子中,两个中心铜离子通过羧基桥连在一起,Cu-Cu的距离为0.264 2 nm,每个Cu(Ⅱ)与来自四个不同配体上的羧基氧原子以及一个来自于溶剂DMF的氧原子配位,形成一个涡轮双核簇合物.循环伏安表明,配位键的形成,对配体的氧化还原的性质影响很小.     

四核Cu(Ⅰ)配合物[Cu4(imdt)9](NO3)4·6H2O的合成与晶体结构

近年来,硫脲类金属配合物在配位化学、生物化学、医药等领域的研究一直受到广泛重视[1,2]。四氢化咪唑-2-硫酮(imdt)又称乙撑硫脲,是乙撑双二硫代氨基甲酸酯类农药的代谢产物。它属于硫酰胺杂环化合物,含—N(H)—C(=S)—=—N=C(—SH)—结构互变活性基团,表现出配位多样性,与金属铜可以形成单核[3]和双核[4,5]配合物。本文合成了四核Cu(I)配合物[Cu4(imdt)9](NO3)4·6H2O,对该配合物进行了元素分析和红外光谱表征,用单晶X-射线衍射测定了晶体结构。1实验部分1·1试剂与仪器配体四氢化咪唑-2硫酮(C3H6N2S,imdt)按文献合成[6],其它药品…     

N-（2,4-二氯苯基)-N′-(苯甲酰基)硫脲脱硫物合铜(Ⅱ)配合物的合成与晶体结构

在甲醇中由N-(2,4-二氯苯基)-N’-(苯甲酰基)硫脲(H2met)和CuCl2回流,合成了脱H2S的CuL2(HL=N-(苯甲酰基)-O-甲基-N’-(2,4-二氯苯基)假硫脲),其中HL由H2met脱硫得到。在室温条件下,采用缓慢挥发溶剂法培养出适合用于X射线衍射测试的单晶。由X单晶衍射确定了其晶体和分子结构,在配合物分子中,Cu(Ⅱ)与2个配体分子(HL)的N原子和2个羰基O原子发生配位,形成了2个六元螯合环[N(1A)—Cu—N(1)的键角为180.0°,O(1A)—Cu(1)—O(1)的键角为180.0°]组成的配合物。     

双层六辐轮状簇合物[Ag（MBI）]6的合成、表征及晶体结构

合成了簇合物[Ag(MBI)]6(MBI为2-巯基苯并咪唑),通过元素分析、红外光谱、紫外-可见光谱和核磁共振氢谱等对其进行了结构表征,并用X射线衍射法测定了其晶体结构。该簇合物的晶体属于单斜晶系,C2/c空间群;晶胞参数:a=19.2865(8),b=18.1398(5),c=24.8614(10),β=108.698(4)°,V=8238.8(5)3,Dc=1.243g/cm3,Z=4,F(000)=2976.0,μ=1.577mm-1,S=1.010,(Δ/σ)max=0.003,R1=0.0524,wR2=0.1612[I>2σ(I)]。[Ag(MBI)]6的核心配位结构含有6个Ag(I)原子、6个S原子和6个N原子,每个Ag(I)通过2个S原子和1个N原子分别与3个MBI配位,其中Ag(I)原子和S原子皆形成桥键。簇合物核由Ag—S—Ag和S—Ag—S桥键形成2个椅式构型的六元环结构,然后通过Ag…Ag次级作用构成罕见的双层六幅轮毂结构。     

具有“松散”配位的三核钼簇合物的研究 {Mo_3(μ_3-X)(μ-S)_3[S_2P(OEt)_2]_4·SC(NH_2)_2}(X=1/2O+1/2S)的合成和结构测定

前文报道了簇合物{Mo_3(μ_3-S)(μ-S)_3[S_2P(OEt)_2]_4·H_2O}(1)的合成和结构,并指出了它的化学活泼性.当它与硫脲反应时,处在松散配位的H_2O被硫脲取代而成簇合物{Mo_3~-(μ_3-S)(μ-S)_3[S_2P(OEt)_2]_4·SC(NH_2)_2}(2),虽未得到适于X射线单晶结构测定用的晶体,但已为红外光谱的数据所证实.按本文合成方法所得簇合物经二氯甲烷-石油醚重结晶,得褐色针状单晶,结构分析表明为标题簇合物,μ_3桥原子由(1/2O+1/2S)统计占有.     

Crystal and molecular structure and electronic structure of a copper(II) complex with 10-(1-phthalazinylazo)-9-phenanthrol (HL) [Cu2(L)2(H2O)4](ClO4)2

The [Cu₂(L)₂(H₂O)₄](ClO₄)₂ compound (I) have been synthesized by the reaction of 10-(1-phthalazinylazo)-9-phenanthrol (HL) with tetraamminecopper(II) perchlorate, and its crystal and molecular structure has been determined by X-ray crystallography. The L anion acts as a tridentate chelating ligand and is coordinated to the Cu atom through the O(1) atoms of the phenanthrenequinone moiety, the N(1) atom of the phthalazinyl moiety, and the N(3) atom of the azo group to form two five-membered chelate rings. The coordination polyhedron of each Cu(1,2) atom is completed to a prolate tetragonal (4 + 1) pyramid by two water molecules with the O(2)(H₂O) atom in the axial position. The molecular and electronic structures of the HL molecule and [Cu(L)(H₂O)₂]⁺ ion have been determined by the density functional theory method. The results of quantum-chemical calculation are shown to fit well to the values found by X-ray crystallography.     

3-(2-吡啶基)-1,2,4-三唑配体Co(II)Cu(II)和Cd(II)配合物的合成、结构及荧光性质

利用3-（2-吡啶基）-1,2,4-三唑配体（HL）和不同的金属盐设计合成了5个配合物[Co（HL）₂（H₂O）₂]（NO₃）₂（1）、[Cu₂（L）₂（NO₃）₂（H₂O）₄] （2）、[Cu₂（L）₂（AcO）₂（H₂O）₂]·6H₂O （3）、[Cu₂（L）₂（HL）₂（ClO₄）₂]·2CH₃CN （4）和[Cd₂（L）₂（HL）₂（NO₃）₂]·2H₂O （5）,并通过X射线单晶衍射、红外、元素分析、X射线粉末衍射和热重对配合物结构进行了表征。测试结果表明配合物1具有单核结构,并且可以通过氢键的相互作用形成二维超分子结构。配合物2~5为双核结构。配合物2和5可以通过氢键的相互作用形成二维超分子结构。配合物3通过氢键的相互作用形成三维超分子结构。研究了配合物中HL配体的配位模式。此外,研究了配体HL和配合物1和5的固态荧光性质及荧光寿命。     

3-(2-吡啶基)-1,2,4-三唑配体Co(Ⅱ)Cu(Ⅱ)和Cd(Ⅱ)配合物的合成、结构及荧光性质

利用3-（2-吡啶基）-1,2,4-三唑配体（HL）和不同的金属盐设计合成了5个配合物[Co（HL）₂（H₂O）₂]（NO₃）₂（1）、[Cu₂（L）₂（NO₃）₂（H₂O）₄]（2）、[Cu₂（L）₂（AcO）₂（H₂O）₂]·6H₂O（3）、[Cu₂（L）₂（HL）₂（ClO₄）₂]·2CH₃CN（4）和[Cd₂（L）₂（HL）₂（NO₃）₂]·2H₂O（5）,并通过X射线单晶衍射、红外、元素分析、X射线粉末衍射和热重对配合物结构进行了表征。测试结果表明配合物1具有单核结构,并且可以通过氢键的相互作用形成二维超分子结构。配合物2~5为双核结构。配合物2和5可以通过氢键的相互作用形成二维超分子结构。配合物3通过氢键的相互作用形成三维超分子结构。研究了配合物中HL配体的配位模式。此外,研究了配体HL和配合物2和5的固态荧光性质及荧光寿命。     

Copper complexes of 1-[(2-carboxyethyl)benzene]-3-[2-pyridine]triazene

The triazenide, 1-[(2-carboxyethyl)benzene]-3-[2-pyridine]triazene (HL), has been synthesized. In the presence of Et₃N, the reaction of HL with Cu(OAc)₂·H₂O or CuCl₂·2H₂O gives the tetranuclear copper(II) complexes {Cu₄(L)₂(μ₂-OH)₂(OAc)₄} 1 and {Cu₄L₄(μ₄-O)Cl₂} 2, respectively. The X-ray crystal structures of both complexes have been obtained. Magnetic studies indicate significant antiferromagnetic coupling between the copper(II) centers for both complexes, with coupling constants (J) of −493.4 cm⁻¹ for 1 and −165 cm⁻¹ for 2.     

Synthesis,crystal structures,and antibacterial activities of two copper(II) complexes derived from 1-[(2-morpholin-4-ylethylimino)methyl]-naphthalen-2-ol

A trinuclear complex, [Cu(Cu(μ-Br)₂L)₂], and a dinuclear complex, [Cu₂(μ-Cl)₂L₂], have been synthesized with the tridentate Schiff base 1-[(2-morpholin-4-ylethylimino)methyl]-naphthalen-2-ol (HL), derived from 2-hydroxy-1-naphthyaldehyde and 4-(2-aminoethyl)morpholine. Both complexes have been characterized by physicochemical and spectroscopic methods. [Cu(Cu(μ-Br)₂L)₂] is a centrosymmetric bromide and phenolate oxygen-bridged trinuclear compound, while complex [Cu₂(μ-Cl)₂L₂] is a centrosymmetric-chloride-bridged dinuclear compound. The central Cu(II) atom in [Cu(Cu(μ-Br)₂L)₂] is six-coordinated in an octahedral coordination, while other Cu(II) atoms in both complexes are five-coordinated in square-pyramidal coordinations. Both complexes and HL were tested in vitro for their antibacterial activities.     

Synthesis and Structures of Four Metal-Organic Coordination Compounds with Isomeric Tripodal Ligands

Four new metal-organic coordination compounds [Ni(L4)₂](ClO₄)₂ · 2H₂O ( 1 ), [Cu₂(L4)₂(H₂O)₂(Cl)](Cl)₃ · 5H₂O ( 2 ), [Cu₂(L3)₂(H₂O)(Cl)](Cl)₂ · (NO₃) · 6H₂O ( 3 ), and [Cu(L3)(H₂O)(NO₃)](NO₃) · H₂O ( 4 ), were synthesized and characterized by X-ray crystallography with two isomeric tripodal ligands N¹-(2-amino-ethyl)-N¹-pyridin-3-ylmethyl-ethane-1,2-diamine (L3) and N¹-(2-amino-ethyl)-N¹-pyridin-4-ylmethyl-ethane-1,2-diamine (L4), respectively. It was found that coordination compound 1 exhibits mononuclear structure, and coordination compound 2 displays a one dimensional (1D) zigzag chain structure. Coordination compound 3 shows interesting cyclic hexanuclear structure, whereas coordination compound 4 is a 1D zigzag chain structure. The results indicate that metal ions, organic ligands, and anions have remarkable influence on the formation and structures of the coordination compounds.     

两个锰配合物的合成、晶体结构及与DNA的作用

用常规溶液法由氯化锰(MnCl₂·4H₂O)和4-甲基-1,2,3-噻二唑-5-甲酸(HL)反应制备了配位聚合物[Mn₃(L)₆(H₂O)₄]_n(1),加入配体菲咯啉(phen)后合成了配合物[Mn₂(phen)₄(H₂O)₂Cl₂](L)₂·3H₂O (2)。用元素分析、红外光谱、热重分析及单晶X射线衍射进行了配合物的表征。单晶结构分析表明:配合物1属单斜晶系P2₁/c空间群,3个锰离子通过6个L^-中的氧原子双齿桥联,形成了线型三核簇合物单元,簇合物单元间又通过其中一个噻二唑环上的氮原子与另一个簇合物单元的锰原子配位,形成层状结构;配合物2属三斜晶系■空间群,锰离子分别与1个氯离子、1个水分子和2个phen分子中的4个氮原子配位,形成六配...     

Syntheses,Crystal Structures,and Antibacterial Activities of Four Schiff Base Complexes of Copper and Zinc

Four Schiff base complexes, [Cu₂(L1)₂(μ‐NCS)₂] ( 1 ), [Cu₂(L2)₂(μ‐N₃)₂] ( 2 ), Cu[Cu(CH₃COO)(L3)]₂ ( 3 ), and [Zn{Zn(C₃H₄N₂)(L3)}₂(NO₃)](NO₃) ( 4 ) (where L1 = 2‐[(pyridin‐2‐ylmethylimino)methyl]phenol, L2 = 1‐[(pyridin‐2‐ylmethylimino)methyl]naphthalen‐2‐ol, and L3 = bis(salicylidene)‐1, 3‐propanediamine), were synthesized and characterized by elemental analyses, infrared spectroscopy, and single crystal X‐ray determinations. Both 1 and 2 are structurally similar di‐nuclear complexes, which are located at crystallographic inversion centers (with the center of the central Cu₂N₂ ring). In 1 , each copper atom has a slightly distorted square pyramidal configuration, coordinated by two nitrogen atoms and one oxygen atom from L1 and another two terminal nitrogen atoms from two bridging thiocyanate anions. The Cu···Cu separation is 3.466(3) Å. The structure of 2 is similar to that of 1 , with Cu···Cu separation of 3.368(2) Å. Both 3 and 4 are linear tri‐nuclear complexes. In 3 , the central Cu²⁺ ion is located on an inversion centre and has a distorted octahedral coordination involving four bridging O atoms from two Schiff base ligands (L3) in the equatorial plane and one O atom from each bridging acetate group in the axial positions. The coordination around the terminal Cu²⁺ ions is irregular‐square pyramidal, with two O and two N atoms of L3 in the basal plane and one O atom from an acetate group in the apical position. The acetate bridges linking the central and terminal Cu²⁺ ions are mutually trans. The Cu···Cu separation is 3.009(3) Å. In 4 , the coordination configuration of the central and the terminal zinc atoms are similar to that of the 3 , with Zn···Zn separation of 3.153(4) Å. The three Schiff bases and the corresponding three copper complexes exhibit good antibacterial properties, while the zinc complex 4 has nearly no.     

Supramolecular chelate copper(II) complex with 4-[(ethoxyimino)(phenyl)methyl]-5-methyl-2-phenyl-1Hpyrazol-3(2H)-one: Synthesis, crystal structure, and properties

A supramolecular Cu(II) complex, [Cu(L)₂(H₂O)]·C₂H₅OH {HL = 4-[(ethoxyimino)(phenyl)methyl]-5-methyl-2-phenyl-1H-pyrazol-3(2H)-one]} was synthesized and characterized structurally. The structure of the Cu(II) complex consists of one Cu(II) atom, two bidentate L-units, one coordinated H₂O and one crystallization ethanol molecule. The Cu(II) atom of the complex has a slightly distorted tetragonal pyramidal geometry. Moreover, every Cu(II) complex molecule links four other molecules into an infinite 2D-layer supramolecular structure via intermolecular O-H…O, O-H…N, and C-H…O hydrogen bonds.     

Synthesis and Crystal Structures of Bis(1‐{(E)‐2‐pyridinylmethylidene}‐semicarbazone)iron(II) and ‐copper(II) Diperchlorate Monohydrates

The pyridine‐2‐carbaldehyde semicarbazone ligand (HL) reacts with iron(II) and copper(II) perchlorates in boiling ethanol to yield red‐violet [Fe^II(HL)₂](ClO₄)₂·H₂O ( 1 ) and light‐green crystals [Cu^II(HL)₂](ClO₄)₂·H₂O ( 2 ). The crystals are triclinic with the metal ions in an octahedral environment, coordinated to two nitrogen and one oxygen‐donor atom from HL. Electronic, magnetic and electrochemical properties are presented as well.