Syntheses,Crystal Structures and Magnetic Properties of Cobalt(Ⅱ) and Manganese(Ⅱ) Coordination Polymers Constructed from 5-(Pyridin-4-yl)Isophthalate Ligands

Two coordination polymers, namely {[Co(L)(H2O)]·H2O}n(1) and [Mn(L)(phen)]n(2, H2L = 5-(pyridin-4-yl)isophthalic acid, phen = 1,10-phenanthroline), have been hydrothermally synthesized and characterized by elemental analysis, IR, TG, magnetic properties, and single-crystal X-ray diffraction. 1 belongs to the triclinic system, space group P1 with a = 7.2188(7), b = 10.0835(8), c = 10.2069(7) ?, α = 113.713(7), β = 99.490(7), γ = 104.516(8)o, V = 628.24(9) ?3, C13H11NCoO6, Mr = 336.16, Z = 2, Dc = 1.777 Mg/m3, μ(MoKα) = 1.395 mm–1, F(000) = 342, S = 1.041, the final R = 0.0381 and wR = 0.0819 for 3744 observed reflections(I 2σ(I)) and R = 0.0448 and wR = 0.0874 for all data. 2 belongs to the monoclinic system, space group P2/c with a = 12.9185(3), b = 10.4343(2), c = 31.7650(6)?, β = 101.282(2)o, V = 4199.08(13)?3, C50H30N6Mn2O8, Mr = 952.68, Z = 4, Dc = 1.507 Mg/m3, μ(MoKα) = 5.447 mm–1, F(000) = 1944, S = 1.128, the final R = 0.1003 and wR = 0.1052 for 8247 observed reflections(I 2σ(I)) and R = 0.2595 and wR = 0.2625 for all data. Single-crystal X-ray diffraction studies show that compound 1 features a 2D sheet structure based on a dicobalt(II) subunit, which is further extended into a 3D metal-organic supramolecular framework by O–H···O hydrogen bond. Compound 2 also possesses a 2D sheet, which is held together into a 3D supramolecular architecture via C–H···O hydrogen bond and π-π stacking interactions. Magnetic studies for compound 2 show antiferromagnetic coupling between the adjacent metal centers, with J = –11.8 cm–1 and g = 2.12 for 2.     

一个吡啶二甲酸镉配位聚合物的合成、晶体结构及荧光性质

通过水热方法,采用H3CAM(H3CAM=4-hydroxy-pyridine-2,6-dicarboxylic acid)与Cd(NO3)2.4H2O反应,合成了1个镉配位聚合物[Cd4(HCAM)4(H2O)8]n(1),并对其结构和荧光性质进行了研究。结构分析结果表明该配合物属于单斜晶系,C2/c空间群。四个HCAM2-配体桥联4个镉离子形成了1个四核镉单元。这些孤立的单元通过氢键作用形成了1个三维配位框架。研究表明,该配合物在室温下能发出兰色荧光。     

2-丙基-1H-4, 5-咪唑二酸构筑的混核锌-钕配位聚合物的合成、晶体结构及磁性质

通过水热方法,合成了一个杂金属的配位聚合物{[NdZn(H₂pimda)₃(Hpimda)(H₂O)₂]·H₂O}_n(1),(H₃pimda=2-丙基-1H-4,5-咪唑二酸),并对其结构和磁性质进行了研究。结构分析结果表明配合物1的晶体属于单斜晶系,P2₁/c空间群。配合物1是由配体2-丙基-1H-4,5-咪唑二酸连接而成的二维层状结构,该二维层通过氢键延伸为三维超分子结构。磁性研究表明,配合物1中相邻钕离子间存在着反铁磁相互作用。     

配位聚合物[Ni(cpna)(bpy)(H2O)]n的合成、晶体结构及磁性质

通过水热方法,采用H₂cpna(H₂cpna=5-(2′-carboxylphenyl))和bpy(bpy=2,2′-bipyridine)与Ni(OAc)₂·4H₂O反应,合成了一个具有二维结构的配位聚合物[Ni(cpna)(bpy)(H₂O)]_n (1),并对其结构和磁性质进行了研究。结构分析结果表明该聚合物的晶体属于单斜晶系,P2₁/c空间群。3个镍(Ⅱ)离子、3个cpna配体、3个2,2′-bpy配体和3个配位水分子形成了一个[Ni₃(cpna)₃(bpy)₃(H₂O)₃]环,这些环通过镍(Ⅱ)离子与cpna配体的配位作用形成了一个二维层状结构。层与层之间又通过π-π堆积作用形成了一个三维的配位框架。研究表明,该聚合物中相邻镍(Ⅱ)离子之间存在很弱的反铁磁相互作用。     

基于八配位铁的化合物(H2prz)[Fe(bpdc)2]·3H2O的合成、晶体结构及磁性质

通过水热方法,采用H2bpdc(H2bpdc=2,2′-bipyridine-6,6′-dicarboxylic acid)和prz(prz=piperazine)与FeSO4.7H2O反应,合成了一个质子传递化合物(H2prz)[Fe(bpdc)2].3H2O(1),并对其结构、热稳定性和磁性质进行了研究。结构分析结果表明该化合物的晶体属于单斜晶系,P21/n空间群。该化合物的分子由1个[Fe(bpdc)2]2-阴离子,1个H2prz2+阳离子和3个水分子组成。其中,Fe原子采取了少见的八配位畸变的十二面体构型。这些化合物分子通过分子间的氢键和π-π堆积作用形成了1个三维的超分子框架。     

Syntheses,Crystal Structures and Luminescent and Magnetic Properties of Cerium(Ⅲ) and Zinc(Ⅱ) Coordination Compounds Constructed from 3,5-Dibromobenzoic Acid

Two coordination compounds, namely [Ce(3,5-Br2BC)3(3,5-HBr2BC)]n(1) and [Zn(3,5-Br2BC)2(phen)](2, 3,5-HBr2 BC = 3,5-dibromobenzoic acid, phen = 1,10-phenanthroline), were assembled. Single-crystal X-ray diffraction studies show that compound 1 possesses a 1D chain coordination network, which is further extended into a 3D supramolecular architecture via Br···Br and Br···O halogen bonding. Compound 2 consists of a mononuclear molecule, which is assembled to a 3D supramolecular framework through C–H···O hydrogen bond, π-π stacking interactions and Br···π halogen bonding. Luminescent and magnetic properties of both compounds have also been studied.     

2-丙基-1H-4, 5-咪唑二酸构筑的混核锌-钕配位聚合物的合成、晶体结构及磁性质

通过水热方法,合成了一个杂金属的配位聚合物{[NdZn(H2pimda)3(Hpimda)(H2O)2]·H2O}n(1),(H3pimda=2-丙基-1H-4,5-咪唑二酸),并对其结构和磁性质进行了研究。结构分析结果表明配合物1的晶体属于单斜晶系,P21/c空间群。配合物1是由配体2-丙基-1H-4,5-咪唑二酸连接而成的二维层状结构,该二维层通过氢键延伸为三维超分子结构。磁性研究表明,配合物1中相邻钕离子间存在着反铁磁相互作用。     

以2,4,4’-联苯三羧酸及2,2’-联吡啶构筑的三维钴(Ⅱ)配位聚合物的合成、晶体结构及磁性质

通过水热方法,以2,4,4’-联苯三羧酸（H₃btc）和2,2’-联吡啶（2,2’-bpy）与CoCl₂·6H₂O反应,合成了1个具有三核钴单元的三维配位聚合物[Co_1.5（btc）（2,2’-bpy）_0.5（2H₂O）]_n,并对其结构和磁性质进行了研究。结构分析结果表明该聚合物的晶体属于单斜晶系,I2/a空间群,a=1.7744（4）nm,b=1.1423（2）nm,c=1.8908（4）nm,β=105.18（3）°,V=3.6985（13）nm³,D_c=1.745g·cm^-3,Z=8,R=0.0484,wR=0.0852（I>2σ（I））。来自4个不同btc^3-配体的4个羧基连接相邻的3个钴（Ⅱ）离子形成了1个三核钴（Ⅱ）的结构单元。这些三核钴（Ⅱ）的结构单元又通过btc^3-配体与钴（Ⅱ）离子的配位作用形成了1个三维的框架。研究表明,该聚合物中相邻钴（Ⅱ）离子之间存在铁磁相互作用。     

Syntheses,Crystal Structures and Luminescent Properties of Lead(Ⅱ) and Cadmium(Ⅱ) Coordination Polymers Constructed from Biphenyl-2,5,3′-tricarboxylate

Two coordination polymers, namely [Pb(Hbtc)(phen)]n(1) and {[Cd3(btc)2(H2O)4]·2H2O}n(2, H3btc = biphenyl-2,5,3'-tricarboxylic acid, phen = 1,10-phenanthroline), were assembled. Single-crystal X-ray diffraction studies show that compound 1 possesses a zigzag chain 1D coordination network, which is further extended into a 3D supramolecular architecture via O–H···O hydrogen bonds and π-π packing interactions. Compound 2 features a 3D open framework based on a tricadmium(II) subunit, generating a trinodal 4,4,6-connected net with the 4,4,6T24 topology defined by the point symbol of(44·62)3(46·69)2. Thermal stability and luminescent properties of both compounds were studied and discussed.     

Syntheses,Crystal Structures,and Magnetic Properties of the Cobalt(Ⅱ) and Nickel(Ⅱ) Coordination Polymers Constructed from 5-Halonicotinate and 2,2ˊ-Biimidazole

Two coordination polymers, namely [Co(5-Clnic)2(H2biim)]n 1 and {[Ni(5-Clnic)(Hbiim)]·H2O}n 2(5-Clnic H = 5-halonicotinic acid, H2 biim = 2,2ˊ-biimidazole), were assembled. Single-crystal X-ray diffraction studies show that compound 1 possesses a 1D chain coordination network, which is further extended into a 3D supramolecular architecture via N–H···O hydrogen bonds and π-π packing interactions. Compound 2 features a 1D chain structure based on the hexanuclear macrocycles. The adjacent 1D chains are held together into a 3D supramolecular framework via N–H···O and O–H···O hydrogen bonding interactions. Thermal stability and magnetic properties of both compounds were studied and discussed.