两个包含联苯类三羧酸配体的钴(Ⅱ)和镍(Ⅱ)配位聚合物的合成、晶体结构及磁性质

采用水热方法,用2种联苯类三羧酸配体:联苯-2,4,4′-三羧酸(H3btc)、5-(3,4-二羧基苯基)吡啶甲酸(H_3dppa)和4,4′-联吡啶(4,4′-bipy)分别与CoCl_2·6H_2O和NiCl_2·6H_2O反应,合成了具有一维双螺旋链结构的配合物[Co(μ_2-H_2btc)2(4,4′-bipy)_2]_n(1)以及二维层状配位聚合物{[Ni_3(μ4-dppa)_2(H_2O)_6]·2H_2O}n(2),并对其结构和磁性质进行了研究。结构分析结果表明2个配合物都属于三斜晶系,P1空间群。配合物1具有一维双螺旋链结构,而且这些链通过O-H…O/N氢键作用进一步形成了三维超分子框架。而配合物2具有基于一维链单元的二维层状结构。4,4′-联吡啶在配合物1和2中分别起配位作用和模板作用。研究表明,配合物1中相邻钴离子间存在铁磁相互作用。     

由联苯三羧酸和含氮配体构筑的钴(Ⅱ)、铅(Ⅱ)和锌(Ⅱ)配合物的合成、晶体结构及荧光性质（英文）

采用水热方法,用联苯三羧酸配体(H_3btc)和菲咯啉(phen)或2,2′-联吡啶(2,2′-bipy)分别与CoCl_2·6H_2O、PbCl_2和ZnCl_2反应,合成了一个单核配合物[Co(Hbtc)(phen)_2(H_2O)]·3H_2O(1)以及2个一维链状配位聚合物[Pb(μ_3-Hbtc)(2,2′-bipy)]_n(2)和{[Zn_3(μ_2-btc)_2(μ_2-H_2O)(2,2′-bipy)_3(H_2O)_5]·8H_2O}_n(3),并对其结构和荧光性质进行了研究。结构分析结果表明3个配合物分别属于正交和三斜晶系,Pna2_1和P1空间群。配合物1具有零维单核结构,而且这些单核钴单元通过O-H…O氢键作用进一步形成了三维超分子框架。而配合物2和3具有基于双核单元的一维链结构。研究表明,配合物2和3在室温下能发出蓝色荧光。     

基于柔性多羧酸配体H3TCOPM构筑的Co(Ⅱ)配合物的合成与结构

以三苯甲烷-4,4′,4″-三羧酸(H_3TCOPM)为主配体,以含氮二齿配体4,4′-bipyridine(4,4′-bipy)为辅助配体,与Co(NO_3)_2·6H_2O通过溶剂热反应得到了2个配位聚合物{[Co_2(α-OH-TCOPM)(OH)(H_2O)_4]·DMF}_n(1)(α-OH-H_3TCOPM=三苯甲醇-4,4′,4″-三羧酸)和{[Co_3(α-OH-TCOPM)_2(4,4′-bipy)_3(H_2O)_6]·2H_2O}_n(2)。晶体结构分析表明,配合物1为四边形的二维层状结构,而配合物2为二维网状结构。采用红外光谱、粉末X射线衍射对配合物进行了表征,用热重分析仪研究了其热稳定性。     

由联苯三羧酸配体构筑的零维四核镍(Ⅱ)配合物和一维锰(Ⅱ)配位聚合物的合成、晶体结构及磁性质

采用水热方法,用2种联苯三羧酸配体biphenyl-2,5,3′-tricarboxylate acid(H_3bptc)和2-(4-carboxypyridin-3-yl)terephalic acid(H_3cptc)以及菲咯啉(phen)或2,2′-联吡啶(2,2′-bipy)分别与Ni Cl_2·6H_2O和Mn Cl_2·4H_2O反应,合成了一个具有零维四核镍结构的配合物[Ni_2(μ_3-Hbptc)(Hbptc)(phen)_3(H_2O)]_2·4H_2O(1)和一个基于三核锰单元的一维链状配位聚合物{[Mn_3(μ_4-cptc)_2(2,2′-bipy)_2(H_2O)_4]·2H_2O}_n(2),并对其结构和磁性质进行了研究。结构分析结果表明2个配合物均属于三斜晶系,P1空间群。配合物1具有零维四核镍结构,而且这些四核镍单元通过O-H…O氢键作用进一步形成了三维超分子框架。而配合物2中存在一个中心对称的三核锰单元,这些三核锰单元又通过配体进一步连接成了一维链。研究表明,配合物1和2中相邻金属离子间存在反铁磁相互作用。     

由4,4'-二甲基-2,2'-联苯二甲酸配体构筑的锌(Ⅱ)和镉(Ⅱ)双核配合物的合成、晶体结构、荧光及光催化性质（英文）

采用水热方法,用4,4′-二甲基-2,2′-联苯二甲酸配体(H_2dbda)和菲咯啉(phen)、2,2′-联吡啶(2,2′-bipy)分别与ZnCl_2或CdCl_2·H_2O反应,合成了3个零维双核配合物[Zn_2(μ-dbda)_2(phen)_2(H_2O)_2](1)、[Zn_2(μ-dbda)_2(2,2′-bipy)_2](2)和[Cd_2(μ-dbda)_2(2,2′-bipy)_2(H_2O)_2]·2H_2O (3),并对其结构、荧光和光催化性质进行了研究。结构分析结果表明3个配合物分别属于三斜和单斜晶系的P1和P2_1/n空间群。配合物1～3都具有零维双核结构,而且这些双核单元通过O-H…O氢键作用进一步形成了三维超分子框架。研究表明,配合物1～3在室温下能发出蓝色荧光。另外,研究了3个配合物对有机染料亚甲基蓝的光催化降解性能,结果表明配合物3可以高效地降解亚甲基蓝。     

由吡啶-三羧酸配体构筑的锌(Ⅱ)和锰(Ⅱ)配合物的合成、晶体结构、荧光及磁性质

采用水热方法,用吡啶-三羧酸配体(H_3L)和2,2′-联咪唑(H_2biim 2,2′-biimidazole)、菲咯啉(phen)、2,2′-联吡啶(2,2′-bipy)分别与ZnCl_2和MnCl_2·4H_2O反应,合成了1个零维配合物[Zn(H_2biim)2(H_2O)_2][Zn(HL)(Hbiim)(H_2O)]_2·8H_2O(1)和2个具有一维链结构的配合物[Mn(μ-HL)(phen)(H_2O)]_n(2)、{[Mn(μ-HL)(2,2′-bipy)(H_2O)]·0.5(2,2′-bipy)}_n(3),并对其结构、荧光和磁性质进行了研究。结构分析结果表明3个配合物分别属于单斜晶系的P21/n和P21/c空间群。配合物1具有3个单核Zn单元组成的零维结构,这些单核单元通过O-H…O/N和N-H…O氢键作用进一步形成了三维超分子框架。配合物2和3具有一维链结构,而且这些链通过O-H…O氢键作用进一步形成了二维超分子网络。研究表明,配合物1在室温下能发出蓝色荧光,聚合物2中相邻Mn髤离子间存在反铁磁相互作用。     

由含硫二羧酸配体构筑的钴(Ⅱ)和锰(Ⅱ)配位聚合物的合成、晶体结构及光催化性质

采用水热方法,用含硫二羧酸配体4-((carboxymethyl)thio)benzoic acid(H2L)和4,4′-联吡啶(4,4′-bipy)分别与Co Cl2·6H2O和Mn Cl2·4H2O反应,合成了2个二维配位聚合物{[Co(μ3-L)(4,4′-bipy)]·H2O}n(1)和{[Mn(μ-L)(4,4′-bipy)(H2O)2]·H2O}n(2),并对其结构和光催化性质进行了研究。结构分析结果表明2个配合物分别属于三斜和单斜晶系、P1和P21/c空间群。配合物1和2分别具有基于双核Co和一维Mn链单元的二维层结构。配合物1和2具有不同的二维层结构是由于采用了不同的金属离子。另外,研究了2个配合物对有机染料亚甲基蓝的光催化降解性能,结果表明配合物2可以高效地降解亚甲基蓝。     

以吡啶-2,5-二羧酸或噻吩-2,5-二羧酸为配体的过渡金属配合物的合成、晶体结构及性质

以吡啶-2,5-二羧酸(2,5-pyridinedicarboxylic acid,H_2L_1)、噻吩-2,5-二羧酸(Thiophene 2,5-dicarboxylic acid,H_2L_2)为主要配体,4,4′-联吡啶(4,4′-bipy)、菲咯啉(phen)为辅助配体,采用溶剂热法成功合成了3个过渡金属配合物:[Co_2(L_1)_2(bipy)(H_2O)_6]·bipy·H_2O (1)、[Cu(L_2)_2(bipy)_2]n(2)、[Ni_2(L_2)(phen)_2(H_2O)_4](3),并利用X射线单晶衍射法、红外光谱(IR)、荧光光谱(FL)和热重分析(TG/DTG)等测试手段对其进行了表征。单晶结构分析表明:配合物1、配合物2为P1空间群,配合物3为P2/n空间群;配合物1和配合物3为零维双核小分子结构,配合物2为二维层状结构。     

两个基于刚性线型三羧酸配体的镍(Ⅱ)配合物的合成

采用水热方法,选用刚性线型三羧酸配体(H3L)和2,2′-联吡啶(2,2′-bipy)与NiCl2·6H2O分别在120和160℃温度下反应,得到了一个具有零维双核镍结构的配合物[Ni2(μ-HL)2(2,2′-bipy)2(H2O)4]·6H2O (1)和一个一维链状配位聚合物{[Ni(μ-HL)(2,2′-bipy)(H2O)2]·H2O}n(2),并对其结构和磁性质进行了研究。结构分析结果表明2个配合物均属于三斜晶系,P1空间群。配合物1具有零维双核镍结构,而且这些双核镍单元通过O-H…O/N氢键作用进一步形成了三维超分子框架,而配合物2具有一维链结构。2个配合物的结构差异可能是由于水热反应温度不同造成的。研究表明,配合物2中相邻镍离子间存在反铁磁相互作用。     

两个包含醚氧桥联三羧酸配体的锌(Ⅱ)配位聚合物的合成、晶体结构及荧光性质

选用2种醚氧桥联三羧酸配体(H_3cpta和H_3dbba)和4,4′-联吡啶(4,4′-bipy)或菲咯啉(phen)与ZnCl_2进行水热合成反应,构筑了2个一维链状配位聚合物[Zn(μ-Hcpta)(4,4′-bipy)(H_2O)]_n(1)和{[Zn_3(μ_3-dbba)_2(phen)_3]·6H_2O}_n(2),并对其结构和荧光性质进行了研究。结构分析结果表明2个配合物分别属于单斜晶系,P2_1和I2空间群。配合物1和2具有两种不同的一维链结构。     

Double Hydrated Cobalt(II) Copper(II) and Nickel(II) Copper(II) Ammine Diphosphates

Synthesis of amorphous and crystalline double hydrated cobalt copper and nickel copper ammine diphosphates with a coordination structure is described.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 3, 2005, pp. 369–372.Original Russian Text Copyright © 2005 by Voitenko, Zhilyak, Kopilevich.     

Cadmium(II), manganese(II) and zinc(II) compounds

Three new compounds, [Cd(μ ₃ -Hpdh)(μ₂-Cl)] _n (1), Mn(Hpdh)₂(H₂O)₂ (2) and Zn(Hpdh)₂ (H₂O)₂ (3) (H₂pdh =?pyridine-2,3-dicarbo-2,3-hydrazide), have been synthesized and characterized by elemental analysis, IR spectra, TG and single-crystal X-ray diffraction. Under hydrothermal conditions, H₂pdh is generated by an in situ acylation of H₂pda (H₂pda =?pyridine-2,3-dicarboxylic acid) with hydrazine hydrate. Complex 1 features a 2D layer structure constructed by a dinuclear Cd(II) building block. In complexes 2 and 3, hydrogen bonding interactions connect mononuclear structures into 3D supramolecular frameworks.     

Crystal structures of ethylenediaminecadmium(II) tetracyanocadmate(II)-benzene(1/2) and ethylenediaminecadmium(II) tetracyanocadmate(II)

The crystal structure of ethylenediaminecadmium(II) tetracyanocadmate(II)-benzene(1/2),I, has been redetermined based on 1632 reflections collected anew for the crystal coated with epoxy resin, with a final conventionalR=0.038;I crystallizes in space groupP4₂22, witha=b=8.265(1) andc=15.512(3) Å, andZ=2. Ethylenediaminecadmium(II) tetracyanocadmate(II),II, is concluded to be identical with the residual metal complex host ofI, remaining after the liberation of the guest benzene molecules;II crystallizes from an aqueous solution containing bis- or tris-ethylenediaminecadmium(II) tetracyanocadmate(II) in space groupI4₁/acd, witha=b=14.366(1) andc=23.771(4) Å, andZ=16; refinement led to a conventionalR=0.043 for 1181 reflections. The bridging ethylenediamine ligand inI turns to a chelating one inII; dissociation and recombination should occur in the coordination sphere of the six-coordinate cadmium atom, whenII is derived fromI by the liberation of the guest molecules. Supplementary Data relating to this article are deposited with the British Library as Supplementary Publication No. SUP 82018 (30 pages).Dedicated to Professor H. M. Powell.     

Hexaaquacobalt(II) bis(hypophosphite) and hexaaquacobalt(II)/nickel(II) bis(hypophosphite)

The title compounds, hexa­aqua­cobalt(II) bis­(hypophosphite), [Co(H₂O)₆](H₂­PO₂)₂, and hexa­aqua­cobalt(II)/nickel(II) bis(hypophosphite), [Co_0.5Ni_0.5(H₂O)₆](H₂PO₂)₂, are shown to adopt the same structure as hexa­aqua­magnesium(II) bis­(hypophosphite). The packing of the Co(Ni) and P atoms is the same as in the structure of CaF₂. The Co^II(Ni^II) atoms have a pseudo‐face‐centred cubic cell, with a = b～ 10.3 Å, and the P atoms occupy the tetrahedral cavities. The central metal cation has a slightly distorted octahedral coordination sphere. The geometry of the hypophosphite anion in the structure is very close to ideal, with point symmetry mm2. Each O atom of the hypophosphite anion is hydrogen bonded to three water mol­ecules from different cation complexes, and each H atom of the hypophosphite anion is surrounded by three water mol­ecules from further different cation complexes.     

Magnetic,epr and SOD studies of some Cu(II)-Cu(II), Cu(II)-Ni(II) and Cu(II)-Zn(II) imidazolate bridged complexes

Magnetic, spectroscopic and superoxide dismutase activity of imidazolate bridged [(Salala)Cu-Im-Cu(Salala)]Na, [(Salala)Cu-Im-Zn(Salala)]Na and [(Salala)Cu-Im-Ni(Salala)]Na (Salala=Salicyledenealiniate, Im=Imdiazolate) are described. The epr and electronic spectra of related mononuclear complexes, viz., [(Salala)Cu-OH(2)] and [(Salala)Cu-ImH] also described. Appearance of a half-field signal in polycrystalline and decrease in mu(eff) per copper(II) ion indicate super exchange coupling between copper(II) ion in [(Salala)Cu-Im-Cu(Salala)]Na binuclear complex. A pH-dependent epr and UV-vis study of 50% aqueous DMSO solution of binuclear complexes suggest that the complexes are stable in narrow pH range.     

N-acetyl-DL-leucinate cobalt(II), nickel(II) and zinc(II) complexes

Summary Complexes of the type M(AcLeu)₂ · B₂ (M = Co^II, Ni^II or Zn^II; B = H₂O, py, 3-pic, 4-pic; AcLeu =N-acetyl-DL-leucinate ion) and M(AcLeu)₂ B (M = Co^II or Zn^II and B = o-phen) were prepared and investigated by means of magnetic and spectroscopic measurements. The i.r. spectra of all the complexes are consistent with bidentate coordination of the amino acid to the metal ion. The room temperature solid state electronic spectra indicate that the symmetry of this species is closer toD _4h and that MO₆ and MO₄N₂ chromophores are present in the M(AcLeu)₂ · 2 H₂O and M(AcLeu)₂B_n · x H₂O (B = py, 3-pic, 4-pic, n=2 and x=0 for M = Ni^II; B = o-phen, n=1 and x=0 for M = Co^II; B = py, 3-pic, 4-pic, n=1 and x=1 for M = Co^II) complexes, respectively. By comparing the Dq values of the amino acid and those of other N-substituted amino acids previously studied, a spectrochemical series of the the cobalt(II) and nickel(II) complexes is proposed. The¹ H n.m.r. spectra of the zinc(II) complexes confirm the proposed stereochemistry.     

Metallatriazadiphosphorines of zinc(II), cadmium(II) and mercury(II)

Metallatriazadiphosphorine complexes corresponding to [{N(PPh₂NR)₂}M(OAc)] and [{N(PPh₂NR)₂}₂M], (R = Ph or SiMe₃; M = Zn, Cd or Hg) have been synthesized under strictly anhydrous and inert conditions by the reaction of the acyclic bis-silylated phosphazene ligand, [HN(PPh₂NSiMe₃)₂], or the bis-phenylated phosphazene ligand, [HN(PPh₂NPh)₂], with Zn, Cd and Hg acetate in 1:1 and 2:1 molar ratios. These complexes are highly soluble in common organic solvents, but unstable hydrolytically as well as thermally, even under reduced pressure. Molecular weight determinations in benzene indicated the monomeric nature of these complexes. Further, they have been characterized on the basis of elemental analysis and spectral studies: i.r. and n.m.r. (¹H, ¹³C and ³¹P) that plausibly reveal a trigonal planar and tetrahedral geometry around the metal atom in the complexes.     

Tetrathioureamercury(II) tetrathiocyanatomanganate(II)

In the title complex, [Hg(CH₄N₂S)₄][Mn(NCS)₄], the Hg and Mn atoms sit at special positions with symmetry and are tetrahedrally coordinated to four thio­urea (TU) S and four thio­cyanate (SCN) N atoms, respectively. The structure consists of discrete cationic and anionic [Hg(TU)₄]²⁺ and [Mn(SCN)₄]²⁻ complexes, and weak N_TU—H⃛S_SCN hydrogen-bond bridges exist between these complexes.     

Synthetic, spectral and solution studies on imidazolate-bridged copper(II)-copper(II) and copper(II)-zinc(II) complexes

Synthesis, spectral and solution studies on 2-ethyl imidazolate-bridged (2-EtIm) homo-binuclear copper(II)-copper(II) and hetero-binuclear copper(II)-zinc(II) homologue are described. Magnetic moment values of homo-binuclear complexes indicate that the imidazolate group can mediate antiferromagnetic interactions. Optical spectra of hetero-binuclear complex at varying pH values suggest that the imidazolate-bridged complex is stable over the pH-range 7.15–10.0.