基于四核金属单元的锌/镉配合物的合成、晶体结构及荧光性质

在水热条件下合成了2个金属配合物Zn₄(Hhpa)₄(phen)₄(1)和{[Cd₈(cnam)₂(bpy)₄(C₂O₄)₆(H₂O)₈]·2H₂O}_n(2)(H₂hpa=2-羟基间苯二甲酸,phen=菲咯啉,H₂cnam=4-氧代-4H-吡喃-2,6-二甲酸,bpy=2,2'-联吡啶),通过元素分析、红外光谱、X-射线单晶衍射、荧光、热重分析和X-射线粉末衍射对其进行表征。配合物1为环状四核锌结构,相邻的四核锌单元通过π…π堆积作用扩展为三维超分子结构;配合物2是基于四核镉单元通过C₂O₄^2-离子和cnam^2-配体连接而成的三维网状结构。在配合物1和2中Hhpa^2-,cnam^2-和C₂O₄^2-离子表现了丰富的配位模式。此外还研究了配合物1和2的荧光性质和热稳定性。     

两个外消旋双U形稀土单核配合物的合成、晶体结构及其表征

对氨基苯磺酸(p-AbsH),邻菲咯啉(phen)与稀土硝酸盐在pH=6～7的水溶液中反应,合成了2个新颖的双U形单核配合物[Ln(O-p-Abs)₂(phen)₂(H₂O)₃](NO₃)·2H₂O,其中Ln=La(1)和Ce(2)。X-射线单晶结构测定表明,2种晶体属异质同晶,正交晶系,Pccn空间群。在2个配合物中,Ln(Ⅲ)离子与5个O原子和4个N原子配位,形成1个畸变的三冠三棱柱体LnN₄O₅配位多面体,其中2个氧原子来自于2个对氨基苯磺酸根的磺酸基,另3个O原子则由配位水分子提供,4个N原子来自2个Phen。p-Abs与phen通过π-π作用构成具有手性的螺旋双U形结构,每个晶胞中含有2对构型相反的[Ln(O-p-Abs)₂(phen)₂(H₂O)₃]⁺,整个晶体呈外消旋,2种异构体分子间通过phen间的π-π作用构成超分子螺旋链,并通过氢键作用形成三维超分子结构。     

5-异烟酰胺基异酞酸与含氮配体构筑的两个铜配合物：水热合成、晶体结构和磁性质研究

由水热法合成了2个铜配合物[Cu(INAIP)(bbi)]·5H₂O (1)和[Cu(INAIP)(phen)(H₂O)]·H₂O (2)(H₂INAIP=5-异烟酰胺基异酞酸,bbi=1,4-二咪唑基丁烷,phen=1,10-邻菲咯啉),并用元素分析、IR及X-射线单晶衍射等对其进行了表征。晶体结构分析结果表明：配合物1和2都属于单斜晶系,C2/c空间群。配合物1是由1,4-二咪唑基丁烷连接[Cu(INAIP)]一维链形成的二维双层结构,而配合物2是通过π-π堆积作用将[Cu(INAIP)]一维无限链延伸为二维结构,这2个化合物最终均被氢键拓展成三维超分子结构。在1.8~300 K温度范围内测试了配合物1和2的变温磁化率,结果表明配合物1中由羧基桥联的双核铜之间存在弱的反铁磁相互作用,而配合物2表现为顺磁性。     

4-氧乙酸苯乙酸构筑的双核Zn(Ⅱ)和Co(Ⅱ)配合物的合成，晶体结构及荧光性能

用水热法合成得到2个新配合物,[M₂L₂(phen)₂(H₂O)₂](L=4-氧乙酸苯乙酸,phen=1,10-邻菲咯啉,M=Zn,1;Co,2),并测定了它们的晶体结构。配合物1和2为异质同晶,单斜晶系,P2₁/c空间群。中心金属M为六配位,相邻的M(Ⅱ)通过2个桥连的配体形成双核笼状次级结构单元,通过氢键和π-π堆积弱作用链接形成二维层结构。通过对配合物1的固态荧光测试,结果表明其在紫光区显示发光效应。     

原位羟基化2，2′-联吡啶类配体及其新颖的铜(Ⅰ)和混价铜(Ⅰ，Ⅱ)超分子构筑的合成(英)

本文利用水热法合成了两个新型一价铜配合物[Cu₂(ophen)₂]·H₂O的类同质多晶结构（1α和1β）和一个混合价的铜配合物[Cu₂(obpy)₂(NO₃)]·H₂O (2)。晶体结构分析表明：1α显现出于无水的类似物[Cu₂(ophen)₂]相同的堆积方式，1β则形成出新奇的空间堆积。混合价化合物2是完全离域的，通过氢键集聚体[(H₂O)₂(NO₃^-)₂]将两个[Cu₂(obpy)₂]⁺单元连接起来形成哑铃状的四核结构。     

含π-π相互作用的Cu(Ⅰ)配位聚合物的合成、表征、晶体结构及发光性能

合成了2个铜(Ⅰ)的配位聚合物{[Cu₂(4-bpo)₂(CH₃CN)₂(PPh₃)₂](BF₄)₂}_n (1)和{[Cu(4-bpo)(CH₃CN)(dppe)_0.5]BF₄}_n (2)(PPh₃=triphenyl-phosphine,dppe=1,2-bis(diphenylphosphino)ethane,4-bpo=2,5-bis(4-pyridyl)-1,3,4-oxadiazole),对其进行了红外、¹H NMR、 ¹⁹F NMR、¹¹B NMR、元素分析等相关表征,并利用X-射线单晶衍射仪测定了化合物的结构。晶体结构研究表明配位聚合物1和2通过π…π相互作用连接成为不同的二维超分子的网状结构：在配合物1中,一维链状结构通过π…π相互作用连接成为二维双层结构和二维网络结构;在配合物2中,一维梯形链状结构通过π…π相互作用组装成不同二维和三维网络结构。此外,还研究了配合物的固态发光性能,显示其存在TLCT/MLCT电荷跃迁。     

两个由1H-苯并三氮唑-1-乙酸构筑的镉、银配合物的合成及晶体结构

合成了2个配位聚合物{[Cd(btaa)(phen)(CH₃COO)]·H₂O}_n(1)和{[Ag₂(btaa)(4,4-bpy)₂](NO₃)·2H₂O}_n(2)(Hbtaa=1H-苯并三氮唑-1-乙酸,phen=1,10-邻菲啰啉,4,4-bpy=4,4-联吡啶),采用单晶X-射线、红外光谱、元素分析和热重分析对配合物进行了表征。配合物1中的镉离子通过1H-苯并三氮唑-1-乙酸根桥连成一位螺旋链状结构。在配合物2中,银离子被4,4-联吡啶连接成一维链状结构,这些一维链通过1H-苯并三氮唑-1-乙酸根桥连以及Ag···Ag作用和π-π堆积连接成一维梯子状结构。此外,还研究了配合物1的荧光性质。     

基于2,4,4'-联苯三羧酸及菲咯啉的锰(Ⅱ)和镍(Ⅱ)双核配合物的合成、晶体结构及磁性质

通过水热方法,用2,4,4''-联苯三羧酸(H₃btc)和菲咯啉(phen)分别与MnCl₂·4H₂O和NiCl₂·6H₂O反应,合成了2个具有双核结构的配合物[Mn₂(Hbtc)₂(phen)₄]·5H₂O (1)和[Ni₂(Hbtc)₂(phen)₄]·2H₃btc·4H₂O (2),并对其结构和磁性质进行了研究。结构分析结果表明2个配合物的晶体都属于三斜晶系,P1空间群。配合物1和2均为双核结构,通过分子间的O-H…O氢键作用,双核的分子被进一步连接成了三维超分子框架。研究表明,双核分子中相邻金属离子间存在反铁磁相互作用。     

两个基于羧基-水分子链构筑的超分子镉配合物的合成、晶体结构和荧光性质

以5甲基-3-吡唑甲酸(H₂MPCA)为主配体,在螯合配体菲咯啉(phen)或2,2'-联吡啶(2,2'-bpy)的存在条件下,与醋酸镉在常温下反应得到2个基于氢键构筑的羧基-水分子链的超分子化合物,[Cd(HMPCA)₂(2,2'-bpy)]·2H₂O(1)和[Cd(HMPCA)₂(phen)]·2.5H₂O(2),并通过元素分析、红外光谱、热重分析、X-射线衍射等对其结构进行了表征.结构分析表明,在化合物1和2中,单核镉的配合物和游离水分子通过氢键及π…π堆积作用形成了三维超分子结构,在此过程中,游离水和羧基构筑的链状水分子簇起着非常重要的作用.此外,我们还研究了化合物1和2的热重和荧光性质.     

基于5-磺酸基间苯二甲酸钠和双三唑烷烃的Cu(Ⅱ)配合物的合成、结构和性质

利用5-磺酸基间苯二甲酸钠(NaH₂sip)和双三唑烷烃,合成了3个配合物[Cu_0.5(btm)(H₂O)](H₂sip)·H₂O}_n(1,btm=双三唑甲烷),{[Cu(btp)₂(H₂sip)(H₂O)](NO₃)·4H₂O}_n(2,btp=双三唑丙烷)和{[Cu(btb)₂(Hsip)]_n(3,btb=双三唑丁烷)。化合物1为一维双链结构;化合物2为二维四方网络结构,多个二维层依次叠加形成三维超分子结构;化合物3也具有二维层状结构,其中金属铜离子和双三唑丁烷构成的一维双链结构经双齿μ₂-Hsip^2-配体连接构成了二维层状结构。同时对配合物的热稳定性和顺磁共振特性进行了讨论。     

Polyoxometalate-supported transition metal complexes and their charge complementarity: synthesis and characterization of [M(OH)6Mo6O18[Cu(Phen)(H2O)2]2][M(OH)6Mo6O18[Cu(Phen)(H2O)Cl]2].5H2O (M = Al(+, Cr3+)

Two Anderson-type heteropolyanion-supported copper phenanthroline complexes, [Al(OH)6Mo6O18[Cu(phen)(H2O)2]2]1+ (1c) and [Al(OH)6Mo6O18[Cu(phen)(H2O)Cl]2]1- (1a) complement their charges in one of the title compounds [Al(OH)6Mo6O18[Cu(phen)(H2O)2]2][Al(OH)6Mo6O18[Cu(phen)(H2O)Cl]2].5H2O [1c][1a].5 H2O 1. Similar charge complementarity exists in the chromium analogue, [Cr(OH)6Mo6O18[Cu(phen)(H2O)2]2][Cr(OH)6Mo6O18[Cu(phen)(H2O)Cl]2].5 H2O [2c][2a].5 H2O 2. The chloride coordination to copper centers of 1a and 2a makes the charge difference. In both compounds, the geometries around copper centers are distorted square pyramidal and those around aluminum/chromium centers are distorted octahedral. Three lattice waters, from the formation of intermolecular O-H.....O hydrogen bonds, have been shown to self-assemble into an "acyclic water trimer" in the crystals of both 1 and 2. The title compounds have been synthesized in a simple one pot aqueous wet-synthesis consisting of aluminum/chromium chloride, sodium molybdate, copper nitrate, phenanthroline, and hydrochloric acid, and characterized by elemental analyses, EDAX, IR, diffuse reflectance, EPR, TGA, and single-crystal X-ray diffraction. Both compounds crystallize in the triclinic space group P. Crystal data for 1: a = 10.7618(6), b = 15.0238(8), c = 15.6648(8) angstroms, alpha = 65.4570(10), beta = 83.4420(10), gamma = 71.3230(10), V = 2182.1(2) angstroms3. Crystal data for 2: a = 10.8867(5), b = 15.2504(7), c = 15.7022(7) angstroms, alpha = 64.9850(10), beta = 83.0430(10), gamma = 71.1570(10), V = 2235.47(18) angstroms3. In the electronic reflectance spectra, compounds 1 and 2 exhibit a broad d-d band at approximately 700 nm, which is a considerable shift with respect to the value of 650-660 nm for a square-pyramidal [Cu(phen)2L] complex, indicating the coordination of [M(OH)6Mo6O18]3- POM anions (as a ligand) to the monophenanthroline copper complexes to form POM-supported copper complexes 1c, 1a, 2c, and 2a. The ESR spectrum of compound 1 shows a typical axial signal for a Cu2+ (d9) system, and that of compound 2, containing both chromium(III) and copper(II) ions, may reveal a zero-field-splitting of the central Cr3+ ion of the Anderson anion, [Cr(OH)6Mo6O18]3-, with an intense peak for the Cu2+ ion.     

含混合配体多酸超分子化合物的水热合成、晶体结构及催化活性

在水热条件下合成了四个含混合配体4,4’-bipy和2,2’-bipy/phen的多酸配位聚合物[Cu(4,4’-bipy)(2,2’-bipy)2]2[SiW12O40]?4H2O (1),[Ag4(4,4’-bipy)3(2,2’-bipy)2][SiW12O40]?2H2O (2),[Cu(4,4’-bipy)(phen)]2[H3O]2[SiW12O40]?8H2O (3)和[Cu(4,4’-bipy-Cl)(phen)]2[H3O][PW12O40]?H2O (4) (bipy = 联吡啶,phen = 邻菲罗啉),通过红外光谱、热重、元素分析、X-单晶衍射对聚合物进行了表征,在苯乙烯催化环氧化反应中,3和4显示了较高的催化活性,这与结构中存在配位不饱和金属中心有关.     

Syntheses and Structures of Two Copper Compounds Supported by Octamolybdate

1INTRODUCTION More and more chemists have currently been inte-rested in the transition metal oxides(so-called polyoxometalates)mainly owing to their structural varieties and promising potential applications in catalysis,biology,medicine and materials science[1].Of the various polyoxometalate structures,the most interesting one is the molybdate family with a va-riety of structural polymers including{Mo2},{Mo4},{Mo6},{Mo8}.etc.These molybdate polymersmight act as versatile building blocks …     

A series of lanthanide-transition metal frameworks based on 1-, 2-, and 3D metal-organic motifs linked by different 1D copper(I) halide motifs

Hydrothermal reactions of lanthanide(III) oxide and copper halide with isonicotinic acid (Hina) and pyridine-2,3-dicarboxylic acid (H2pdc) or 1,2-benzenedicarboxylic acid (H2bdc) lead to three novel lanthanide(III)-copper(I) heterometallic compounds, namely, [Ce2(ina)5(na)2(H2O)2][Cu5Br4] (1, na=nicotinic acid), [Er4(ina)8(bdc)2(OH)(H2O)5][Cu8I7] (2), and [Ce3(ina)8(bdc)(H2O)4][Cu7Br6] (3). Compound 1 is constructed from two distinct units of the Ln-organic double chains and inorganic [Cu5Br4]nn+ chains. Compound 2 consists of 2D Ln-organic layers and 1D [Cu8I7]nn+ cluster chains. Compound 3 can be viewed as a 1D [Cu6Br6]n chainlike motif inserted into the channels of a 3D Ln-Cu-organic motif. Compounds 1-3 exhibit three different 1D inorganic copper(I)-halide chains interconnected with metal-organic 1D chains, 2D layers, and 3D nets resulting in three mixed-motif non-interpenetrating heterometallic Cu-halide-lanthanide (Ln)-organic frameworks, which represent good examples and a facile method to construct such mixed-motif heterometallic compounds. Furthermore, the IR, TGA, and UV-vis spectra of 1-3 were also studied.     

由Keggin型簇和过渡金属配合物构筑的杂多钨酸盐锯齿链的合成和结构

采用水热法合成了一维锯齿链状的有机-无机杂化杂多钨酸盐[Cu（en）2（H2O）]{[Cu（en）2（H2O）][Cu（en）2]（α-SiW12O40）}（OH）2·H2O（记作1;en=1,2-乙二胺）;利用元素分析、红外光谱和X射线单晶衍射对其结构进行了表征.结果表明,化合物1属于三斜晶系,P-1空间群;其晶格参数为：a=1.297 6（6）nm,b=1.473 5（7）nm,c=1.909 9（9）nm,α=86.736（8）°,β=88.833（8）°,γ=74.840（8）°,V=3.519（3）nm3,Z=2.就分子结构而言,化合物1由一个常见的Keggin型多阴离子[α-SiW12O40]4-、两个不同的铜配位阳离子[Cu（en）2（H2O）]2＋和[Cu（en）2]2＋、一个游离的铜配位阳离子[Cu（en）2（H2O）]2＋、两个氢氧根离子和一个结晶水组成;相邻的[α-SiW12O40]4-多阴离子通过两个配位阳离子[Cu（en）2）]2＋相连,形成一维锯齿链状结构.     

Rational design and synthesis of porous organic-inorganic hybrid frameworks constructed by 1,3,5-benzenetriphosphonic acid and pyridine synthons

1,3,5-Benzenetriphosphonic acid, H6BTP, 1,3,5-[(HO)2OP]3C6H3, was reacted hydrothermally with copper salts in the absence and presence of 4,4'-bipyridine (bpy) and 4,4'-trimethlyenedipyridine (tbpy) in a 1:1 molar ratio leading to three new organic-inorganic hybrid frameworks. Compound 1, {Cu6[C6H3(PO3)3]2(H2O)8} x 5.5 H2O, has three different copper ions that are interconnected by the highly charged [1,3,5-(PO3)3C6H3]6- anionic moieties. These moieties self-assemble through tetra-copper units to give a cagelike motif with two benzene rings parallel to each other at a distance of 3.531 A which extend along the a axis and link with a grouping of four-coordinated copper units in the b axis direction to give the cross-linked layered structure. In compound 2, Cu{C6H3[PO(OH)O]2[PO(OH)2]}(C10H8N2), the copper ions are in square pyramidal geometries and are interconnected via chelating and bridging BTP ligands into layers which are further cross-linked by bpy ligands into a pillared layered architecture. Compound 3, {Cu2C6H3[PO(OH)O]2[PO3](C13H14N2)} x 3 H2O x 0.5 HCON(CH3)2, contains tetra-copper units that are linked by BTP ligands and further linked by tbpy linkers in the c axis direction to produce a large channel-sized 3D framework.     

Combination of Lindqvist-type Tungstovanadates and Transition Metal Clusters under Hydrothermal Conditions

<正>Two novel organic-inorganic heteropolyoxometalate compounds [{Cu(1,10- phen)OH}_2]_2[V_2W_4O_19]·6H_2O (1) and [Co(1,10-phen)_3]_2[V_2W_4O_(19)]·5H_2O (2) (1,10-phen = 1,10- phenanthroline) were hydrothermally synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. Compound 1 contains a di-V substituted classical Lindqvist-type polyanion [V_2W_4O_(19)]~(4-), two dinuclear copper cations [{Cu(1,10-phen)OH}_2]~(2+) and six water molecules of crystallization. Two dinuclear copper cations [{Cu(1,10-phen)OH}_2]~(2+) consist of four transition metal coordination cations {Cu(1,10-phen)}~(2+), bridged by four hydroxyl groups. Meanwhile, both two dinuclear cations are grafted on the Lindqvist polyanion [V_2W_4O_(19)]~(4-) through two terminal oxygen (O(9)) and two μ_2-oxygen (O(6)) atoms. Such an unusual linking fashion is unique in the polyoxometalate chemistry. The basic framework of 2 is similar to that of 1 and contains one Lindqvist-type polyanion [V_2W_4O_(19)]~(4-), two six-coordinated cobalt cations [Co(1,10-phen)_3]~(2+) and five free water molecules.     

Hydrothermal Synthesis and Crystal Structure of a New Supramolecular Channel Framework Based on Cu Complexes and Polyoxovanadate:[Cu(I)(phen)_2]_5[HV_(15)O_(36)(Cl)]_(0.65)[H_3V_(16)O_(38)(Cl)]_(0.35)·2H_2O

1 INTRODUCTION In the past years, polyoxovanadates have attracted extensive interest in solid-state material chemistry owing to the formation of mixed-valence com- pounds that exhibit rich electronic and magnetic properties relevant to catalysis, medicine and ma- terials science[1～4]. The following polyoxovanadates have been found and structurally characterized: [V5O14]3-, [V6O19]8-, [V10O28]6-, [V12O32]4-, [V13- O34]3-, [V15O36]5-, [V15O42]9-, [V17O42]4-, [V18- O42]12-, [V16O38]7…     

Incorporating distinct metal clusters to construct diversity of 3D pillared-layer lanthanide-transition-metal frameworks

Three novel 3D pillared-layer heterometallic lanthanide-transition-metal (hetero-Ln-TM) compounds, namely, Ln2Cu7I6(ina)7(H2O)6.H2O [ina=isonicotinic acid; Ln=Ce (1), Sm (2)] and Er4(OH)4Cu5I4(ina)6(na)(2,5-pdc).0.3H2O (3; na=nicotinic acid, 2,5-pdc=2,5-pyridinedicarboxylic acid), have been obtained by incorporating different metal clusters as building blocks under hydrothermal conditions. Compounds 1 and 2 are isostructural and consist of two distinct building units of dimeric [Ln2(ina)6] cores and inorganic 2D [Cu8I7]nn+ layers based on the [Cu3I3] and [Cu4I3]+ clusters. Compound 3 is constructed from decanuclear [Cu10I8]2+ clusters and inorganic 1D [Er4(OH)4]n8n+ cluster chain-based layers, which represent the first example of a 3D hetero-Ln-TM constructed by the combination of two distinct types of metal cluster units of a 1D [Er4(OH)4]n8n+ cluster polymer and a transition-metal cluster. It is interesting that decarboxylation occurred in the ortho position and 2,5-pdc2- was partially transformed into na- under hydrothermal conditions. Compounds 1-3 represent good examples of using different metal cluster units to construct fascinating 3D hetero-Ln-TM frameworks.     

Structural, magnetic, and spectroscopic comparative studies on four new derivatives of DIMMAL (2-di1H-2-imidazolylmethylmalonate): a novel generator of multidimensional networks

This paper reports the synthesis, structure solution, and magnetic characterization of four new DIMMAL-containing compounds (H2DIMMAL = 2-di1H-2-imidazolylmethylmalonic acid), H2DIMMAL x H2O (1), Na2(DIMMAL) x 5H2O (2), [Cu(HDIMMAL)2] (3), and [Cu2(DIMMAL)2(H2O)2] x 2H2O (4). Compound 1, containing two carboxylates and two protonated imidazole rings, adopts the dizwitterion configuration. These monohydrate MBBs pack together into a 3D array driven, as in the other three cases herein reported, by a combination of multiple-path H-bonds and aromatic-aromatic interactions. Compound 2 consists of centrosymmetric Na+ tetramers in which four NaO6 distorted octahedra are interconnected by carboxylate and water bridges. Compound 3 consists of mononuclear [Cu(HDIMMAL)2] units in which HDIMMAL- acts as a tridentate ligand through two imidazole N atoms and the deprotonated O from a carboxylate. Compound 4 consists of centrosymmetric cyclic dinuclear [Cu2(DIMMAL)2(H2O)2] x 2H2O units involving propionate-arm bridges. The building-block units described above, in each case, are interconnected into 3D networks by multiple H-bonding paths and aromatic-aromatic interactions. The EPR spectra are indicative of an essentially d(x2-y2) ground state for the copper(II) ions in 3 and 4 (CuN4O2 and CuN2O2O' chromophores, respectively). Magnetic susceptibility measurements in the range of 1.8-200 K for compound 4 show weak antiferromagnetic exchange between the copper(II) ions (2J = -1.6(1) cm(-1)). The effectiveness of the propionate-arm bridges, involving C-C sigma bonds, in propagating magnetic exchange between the copper(II) ions is discussed.