含1，3，5-三-((4-吡啶)-1，2-乙烯基)苯的配位聚合物的合成、结构及性质

用三烯烃三吡啶配体1,3,5三-((4-吡啶)-1,2-乙烯基)苯(tpeb)和M(NO_3)_2(M=Co,Ni,Zn,Cd)以及4种不同的有机羧酸(3,5-二溴苯甲酸(3,5-HDBB)、2,5-噻吩二羧酸(2,5-H_2TDC)、2,5-呋喃二羧酸(2,5-H_2FDC)、2,5-二溴对苯二甲酸(2,5-H_2DBTP))进行溶剂热反应,得到了[Zn(tpeb)(3,5-DBB)_2]_n(1)、[Co_2(tpeb)_2(2,5-TDC)_2]_n(2)、[Co_2(tpeb)_2(2,5-FDC)_2]_n(3)、[Co(tpeb)(2,5-DBTP)]_n(4)、[Ni(tpeb)(2,5-DBTP)]_n(5)、[Cd(tpeb)_(0.5)(2,5-DBTP)]_n(6)六个配位聚合物。对配合物1～6分别进行了单晶X射线衍射、粉末X射线衍射、红外、元素分析、热重、荧光等结构表征。配合物1～6结构独特且多样。配合物1是由[Zn(3,5-DBB)_2]单元通过配体tpeb桥联构筑的一维zigzag链状结构;配合物2和3是由一维梯状[Co(tpeb)]_n链分别与2种不同的五元杂环二取代羧酸桥联构筑而成的二维双层结构;配合物4和5均是由一维[M(2,5-DBTP)]_n(M=Co,Ni)链通过tpeb交叉连接而成的三维网络结构;配合物6则是由二维的[Cd(2,5-DBTP)]_n层状结构通过tpeb连接而成的三维互穿拓扑网络结构。配合物1～6的热稳定性较好,它们在固态时表现出不同的荧光性质。     

刚性4-取代双三唑配体构筑的三个锌配合物的合成和荧光

在室温下合成了3个新的配位聚合物{[Zn(4?Nbdc)(btx)]·2H₂O}_n(1·2H₂O)、[Zn(btx)_1.5(1,3?bdac)]n(2)和{[Zn(mbtx)(1,3?bdc)(H₂O)₂]·H₂O}_n(3)(btx=1,4?二(4H?1,2,4?三唑)苯,mbtx=1,3?二(4H?1,2,4?三唑)苯,4?Nbdc=4?硝基邻苯二甲酸根,1,3?bdac=间苯二乙酸根,1,3?bdc=间苯二甲酸根),测试了配合物的单晶结构,并从元素分析、红外和粉末衍射等方面进行表征。单晶X射线衍射表明,配合物1是二维(4,4)网格结构,配合物2和3都是一维链状结构。配合物2中的π?π作用将一维链连接成三维网格结构。在配合物3中,分子间氢键将一维链连接成二维网格,2套二维网格在分子间氢键的作用下相互穿插得到2D+2D→2D的网格结构。同时,还研究了3个配位聚合物的荧光和热稳定性。     

新型手性金属-有机配位聚合物的合成、结构与性质

在水热条件下, 分别用过渡金属离子Zn(Ⅱ)和Co(Ⅱ)与混合手性羧酸和含氮配体反应, 合成了2个手性金属-有机配位聚合物[M(D-cam)(H₂mbdpz)]_n[M=Zn(1), Co(2); D-H₂cam=D-(+)-樟脑酸; H₂mbdpz=4,4'-亚甲基二(3,5-二甲基吡唑)]. 通过单晶X射线衍射、粉末X射线衍射、元素分析、热重分析及荧光分析对其结构、组成和性质进行了表征. 单晶结构分析表明, 配合物1和2是异质同晶的手性三维开放骨架结构, 具有单节点三连接的ThSi₂型网络拓扑结构.     

新型含2,5-二-（3,5-二甲基吡唑-4-巯基）-1,3,4-噻二唑-M(M=Co2+,Cd2+,Mn2+)配合物的合成、晶体结构及其抑菌活性研究

将配体L[2,5-二-(3,5-二甲基吡唑-4-巯基)-1,3,4-噻二唑]与Co(NO3)2 6H2O,Cd(NO3)2 4H2O和MnCl2 4H2O进行配位反应,得到三个配合物[Co(L)2(H2O)4](NO3)2 4(CH3CH2OH)(1),[Cd(L)2(H2O)4](NO3)2 4(CH3CH2OH)(2),[Mn(L)2(Cl)2(CH3OH)2]2(CH3OH)(3),并用元素分析,FT-IR和X射线单晶衍射进行了表征.分析结果表明,配体L呈"U"形,配合物1～3呈"S"形.配合物中Co(II),Cd(II),Mn(II)的配位环境均为扭曲八面体,每个金属离子同时和两个配体进行配位.配体和配合物体外抑菌活性研究结果表明,配体及其配合物都有一定的抑菌活性.     

1,2,4-苯三甲酸与2,2-联吡啶构筑的银(Ⅰ)和镉(Ⅱ)配合物的合成、晶体结构、热稳定性及荧光性质

通过pH调控的水热法合成了2种配合物[Ag(H2btc)(bpy)](1)和[Cd(Hbtc)(bpy)(H2O)2]n(2)(H3btc=1,2,4-苯三甲酸,bpy=2,2′-联吡啶),并通过X射线单晶衍射、红外光谱、热重分析、荧光光谱进行了表征与性质研究。结果表明,配合物1为零维的单核小分子结构,配合物2为一维的链状结构。荧光研究表明,这2种配合物均具有荧光性质。     

两个d~(10)金属配位聚合物的合成、结构及对2,4,6-三硝基苯酚的选择性检测（英文）

以4,4′-二(1-咪唑基)苯硫醚(BIDPT),4,4′-羧基二苯胺(H2aba),5-氧乙酸间苯二酸(H_3OABDC),Zn(NO_3)_2·6H_2O和Cd(NO_3)_2·6H_2O为原料,用溶剂热法合成了2个配位聚合物[Zn(BIDPT)(aba)]n(1)和[Cd(BIDPT)(HOABDC)]n(2)。利用X射线单晶衍射、红外、元素分析、热重分析和X射线粉末衍射对其进行了表征。单晶X射线衍射研究发现配合物1为具有二重穿插的三维dia拓扑网络结构;配合物2为3-连接六边形的hcb二维拓扑结构,再通过氢键堆积作用形成三维超分子结构。1和2具有很好的荧光性质,硝基苯化合物对配合物1和2的荧光性质有不同程度的淬灭作用。它们都对2,4,6-三硝基苯酚的检测具有很好的灵敏性。对其淬灭机理进行了深入的研究。     

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.     

杂金属配位聚合物[Ln2Zn2(2,5-pydc)5(H2O)2]·4H2O的合成、结构及发光特性

采用水热法通过Ln2O3、Zn(CH3COO)2·2H2O与2,5-吡啶二羧酸为配体的反应合成出两个新型三维杂金属配位聚合物[Ln2Zn2(2,5-pydc)5(H2O)d·4H2O (Ln=Sm(1),Eu(2);2,5-pydc:2,5-吡啶二羧酸).通过元素分析、红外光谱、X射线粉未衍射方法以及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的结构是相同的,其晶体均为单斜晶系,空间群为P21/C.配合物1和2中2,5-吡啶二羧酸配体共有两种配位方式.通过配位模式Ⅰ连接Ln和Zn形成二维层状结构;而层与层之间通过配位模式Ⅱ进一步连接起来形成三维复杂网状结构.此外,还对配合物的荧光性质和热分解过程进行了详细分析.荧光分析表明,金属Zn的引入有效增强了配合物中稀土金属的发光.     

2种同构紫精配位聚合物的合成及其光致变色性能

变色材料作为一种新型的智能材料,在光存储信息和光学器件等领域具有巨大的应用潜力。以具有柔性骨架的紫精配体1,1’-双(4-羧基苄基)-4,4’-联吡啶二氯化物(H₂BpybcCl₂)作为功能配体,与过渡金属离子Mn²⁺和Cd²⁺自组装,合成2个同构配位聚合物[Mn(Bpybc)Cl₂·H₂O]_n(1)和[Cd(Bpybc)Cl₂·4H₂O]_n(2)。X射线单晶衍射表明,2个化合物为一维链状结构。在紫外灯照射下,光诱导电子转移而产生紫精自由基,2种化合物均表现出明显的光致变色行为。     

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。     

Ligand concentration-dependent supramolecular complexes with uncoordinated carbonyl groups based on a new pyrazole carboxylic acid ligand

One new pyrazole-based ligand, 1-carboxymethyl-3,5-dimethyl-1H-pyrazole-4-carboxylic acid (H₂cmdpca), has been synthesized and characterized. Structural analysis reveals that H₂cmdpca crystallizes in the monoclinic system and adopts a 3-D supramolecular network via the interaction of intermolecular hydrogen bonds. The reactions of Cd(II) ions with H₂cmdpca and 4,4′-bipyridine (4,4′-bpy) afforded three metal complexes, [Cd(4,4′-bpy)(Hcmdpca)₂(H₂O)₃]·H₂O (1), [Cd(4,4′-bpy)(Hcmdpca)₂(H₂O)]·3H₂O (2), and [Cd(4,4′-bpy)(Hcmdpca)₂(H₂O)] (3). Structural analyses reveal that these complexes are all monoclinic and 1, 2, and 3 exhibit mononuclear, 1-D chain, and 1-D with binuclear loop structures, respectively, which are further assembled into 3-D supramolecular frameworks through non-covalent interactions. 1 and 2 are true supramolecular isomers, while 2 and 3 are “pseudo-supramolecular” isomers. In addition, the thermal stability and luminescent properties of the complexes are also investigated.     

Two transition metal supramolecular compounds based on 2-(4-isopropylbenzoyl)benzoic acid: syntheses,crystal structures,and luminescent properties

Two new supramolecular compounds, [Zn₂(L)₃(4,4′-bpy)(OH)]_n (1) and [Cd(L)₂(2,2′-bpy)(H₂O)]·2H₂O (2) (HL?=?2-(4-isopropylbenzoyl)benzoic acid, 4,4′-bpy?=?4,4′-bipyridine, 2,2′-bpy?=?2,2′-bipyridine), have been hydrothermally synthesized and characterized by elemental analysis, infra-red spectroscopy, thermal gravimetric analyzes, and single-crystal X-ray diffraction. 1 exhibits 1-D chain and 2 is 0-D mononuclear. They are both linked into 2-D supramolecular layers by non-covalent interactions. Luminescence properties were also investigated.     

Syntheses,crystal structures,and luminescent properties of two cadmium(II) complexes based on bis(imidazole) and dicarboxylate

Two complexes, [Cd(ip–OH)(H₂biim)(H₂O)][Cd(ip–OH)(H₂biim)(H₂O)₃]·8(H₂O) (1) and [Cd(Himdc)(H₂biim)] _n (2) (H₂ip–OH?=?5-hydroxylisophthalic acid, H₂biim?=?2,2’-biimidazolate, H₃imdc?=?4,5-imidazoledicarboxylic acid), have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. 1 is a 3-D supramolecular network constructed by 0-D and 1-D motifs through hydrogen bonds and π?π interactions. Complex 2 is a 1-D zigzag polymeric coordination chain and the chains are connected to form a 3-D supramolecular network by hydrogen bonds. The complexes were characterized by elemental and thermogravimetric analyses. Fluorescence was also investigated.     

Syntheses and characterizations of two metal-organic polymers derived from pyridyl substituted terpyridine and 4,5-imidazole dicarboxylate

Two metal-organic coordination polymers, [Cd(HIDC)(pytpy)] (1) and [Zn(HIDC)(pytpy)] · (H₂O) (2), have been synthesized by reactions of 4′-(3-pyridyl)-2,2′ : 6′,2″-terpyridine (pytpy), 4,5-imidazoledicarboxylic acid (H₃IDC) with CdCl₂ · 2.5H₂O and ZnCl₂, respectively, in the presence of base. Compound 1 is a one-dimensional (1-D) helical chain with the chains extended into a three-dimensional supramolecular network through two different π ··· π interactions from pytpy ligands. Compound 2 is also a 1-D helical chain and adjacent chains are packed into a 2-D layer through π ··· π interactions between terminal pyridyl and pendant pyridyl rings from pytpy ligands. The photoluminescent properties of the two compounds are also investigated.     

Syntheses,crystal structures,and luminescent properties of three metal coordination polymers based on adipic acid and 2-(pyridine-3-yl)-(1H)-benzimidazole

Three new metal coordination polymers constructed from adipic acid and 2-(pyridin-3-yl)-(1H)-benzimidazole ligands, [M(ADP)(3PBI)₂(H₂O)₂]·2H₂O (M = Ni and Co for 1 and 2, respectively) and [Cd(ADP)(3PBI)(H₂O)] (3) [ADP = adipic acid dianion; 3PBI = 2-(pyridin-3-yl)-(1H)-benzimidazole], have been synthesized by hydrothermal reactions and were characterized by X-ray single-crystal diffraction, elemental analyses, IR, powder X-ray diffraction, and thermogravimetry. Complexes 1 and 2 are isostructural. Both form a 1-D linear chain structure, which is further assembled into a 3-D supramolecular framework by π?π stacking and hydrogen bonding interactions. Complex 3 possesses a binuclear unit and displays a 2-D layer which is further extended to a 3-D supramolecular architecture via hydrogen bonding and other weak packing interactions. The luminescent properties of 3 were investigated in the solid state at room temperature.     

Syntheses,crystal structures,and characterization of three metal–organic complexes with 2,2′-biphenyldicarboxylic acid and phenanthroline ligands

Three complexes constructed with 2,2′-biphenyldicarboxylic acid, multidentate nitrogen donors, and metal salts, {[Cd(2,2′-dpdc)(tppp)(H₂O)]₂?·?2H₂O} _n (1), {[Pb(2,2′-dpdc)(pyphen)]₂} _n (2), and {[Pb(2,2′-dpdc)(dppz)]} _n (3) (H₂dpdc = 2,2′-diphenyldicarboxylic acid; tppp = 4-(1H-1,3,7,8-tetraazacyclopenta[l]phenanthren-2-yl)phenol; pyphen?=?pyrazino[2,3-f]-[1,10]phenanthroline; and dppz = dipyrido[3,2-a:2′,3′-c]phenazine), are synthesized under hydrothermal conditions. These complexes are characterized by single-crystal X-ray diffraction, elemental analysis, IR, TGA, and photoluminescence. In 1, two 2,2′-dpdc ions bridge two Cd(II) ions to form an isolated cluster with Cd?···?Cd distance of 5.023(4)?Å. These clusters are further linked by intermolecular hydrogen bonds, yielding a 2-D supramolecular structure. Complex 2 contains two crystallographically independent Pb(II) ions in the asymmetric unit. Pb1 ions are bridged by 2,2′-dpdc anions to form a chain along the x-axis. Two Pb2 ions are coordinated by two 2,2′-dpdc anions and two pyphen ligands to form a cluster. These clusters are linked by π–π interactions to yield a 1-D supramolecular chain along the y-axis. In 3, neighboring Pb(II) atoms are bridged by 2,2′-dpdc anions to form a 1-D chain structure. Further, the chains are linked into a 3-D supramolecular network through aromatic π–π interactions.     

Flexible bis(pyridyl-tetrazole) ligand-induced ring-containing metal–organic coordination polymers: synthesis,structures, and properties

Three coordination polymers (CPs), [Co(3-bptzp)(BDC)] (1), [Zn(3-bptzp)(BDC)] (2), and [Cd(3-bptzp)(BDC)] (3) (3-bptzp = 1,4-bis(5-(3-pyridyl)tetrazolyl)propane, H₂BDC = 1,3-benzenedicarboxylic acid), were synthesized under hydrothermal conditions. The CPs were structurally characterized by single-crystal X-ray diffraction, infrared spectroscopy (IR), elemental analyses, and powder X-ray diffraction (PXRD). Complexes 1–3 represent the first examples of CPs based on the flexible bis(pyridyl-tetrazole) 3-bptzp. Structure analyses reveal that 1–3 are 1-D ring-containing polymeric chains. For 2 and 3, adjacent 1-D chains are extended to 2-D supramolecular networks by hydrogen bonding. Dye adsorption properties of 1–3, electrochemical properties of 1, and fluorescent-sensing behaviors of 2 and 3 have also been investigated.     

Unusual coordination features and self-assembly of a crown ether complex [Na2(2,3-naphtho-15-crown-5)2(NO3)][Cu(NO3)3(H2O)]

A novel supramolecular complex, [Na₂(2,3-naphtho-15-crown-5)₂(NO₃)][Cu(NO₃)₃(H₂O)] (1), has been prepared and characterized by X-ray single crystal diffraction. The complex crystallizes in the triclinic system, space group Pī, with a?=?11.233(6), b?=?13.342(7), c?=?16.601(8)?Å, α?=?89.836(7), β?=?79.132(8), γ?=?66.545(7)°, V?=?2234(2)?ų, Z?=?2 and final R ₁(wR ₂)?=?0.0467(0.1164). Novel coordination features and supramolecular architectures are found in the solid state of 1. Two [Na(2,3-naphtho-15-crown-5)]⁺ cations containing two different sodium coordination numbers (six and seven) are bridged by a tridentate nitrate group, to form a larger complex cation, [Na₂(2,3-naphtho-15-crown-5)₂(NO₃)], which is assembled into a novel 1D zigzag chain-like structure through aromatic C–H?···?π interactions.     

Architectural diversity of six coordination compounds based on (S)-(+)-mandelic acid and different N-donor auxiliary ligands: syntheses,structures, and luminescent properties

Six transition metal coordination compounds with H₂mand and different N-donor ligands, [Co(Hmand)₂(2,2′-bipy)]·H₂O (1), [Ni(Hmand)₂(2,2′-bipy)]·H₂O (2), [Ni(Hmand)₂(bpe)] (3), [Zn(Hmand)₂(2,4′-bipy)(H₂O)]·2H₂O (4), [Zn(Hmand)(bpe)(H₂O)]_n[(ClO₄)]_n·nH₂O (5), and [Zn(Hmand)(4,4′-bipy)(H₂O)]_n[(ClO₄)]_n (6), were synthesized under different conditions (H₂mand = (S)-(+)-mandelic acid, bpe = 1,2-di(4-pyridyl)ethane, 4,4′-bipy = 4,4′-bipyridine, 2,4′-bipy = 2,4′-bipyridine, 2,2′-bipy = 2,2′-bipyridine). Their structures were determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, infrared spectra, thermogravimetric analysis, powder X-ray diffraction, and circular dichroism. Compounds 1 and 2 are isostructural (0-D structures), which are extended to supramolecular 1-D chains by hydrogen bonding. Compound 3 exhibits 1-D straight chain structures, which are further linked via hydrogen bond interactions to generate a 3-D supramolecular architecture. Compound 4 displays a discrete molecular unit. Neighboring units are further linked by hydrogen bonds and π–π interactions to form a 3-D supramolecular architecture. Compound 5 displays a 2-D undulated network, further extended into a 3-D supramolecular architecture through hydrogen bond interactions. Compound 6 possesses a 2-D sheet structure. Auxiliary ligands and counteranions play an important role in the formation of final frameworks, and the hydrogen-bonding interactions and π–π stacking interactions contributed to the formation of the diverse supramolecular architectures. Compounds 1, 2, 4, 5, and 6 crystallize in chiral space groups, with the circular dichroism spectra exhibiting positive cotton effects. Furthermore, the luminescent properties of 4–6 have been examined in the solid state at room temperature, and the different crystal structures influence emission spectra significantly.