A two-dimensional cadmium(II) coordination polymer constructed from 4-carboxy-1-(4-carboxylatobenzyl)-2-propyl-1H-imidazole-5-carboxylate and 1-(4-carboxylatobenzyl)-2-propyl-1H-imidazole-4-carboxylate ligands

2018 ◽  
Vol 74 (8) ◽  
pp. 967-973
Author(s):  
Fenfang Li ◽  
Miaoli Zhu ◽  
Liping Lu
Keyword(s):  
Coordination Polymer ◽  
Water Molecule ◽  
Spectroscopic Properties ◽  
Synthesis Process ◽  
Two Dimensional ◽  
Hydrothermal Conditions ◽  
Pxrd Pattern ◽  
Carboxylate Groups ◽  
Coordinated Water ◽  
Ir Spectroscopic

Crystals of poly[[aqua[μ3-4-carboxy-1-(4-carboxylatobenzyl)-2-propyl-1H-imidazole-5-carboxylato-κ5 O 1 O 1′:N 3,O 4:O 5][μ4-1-(4-carboxylatobenzyl)-2-propyl-1H-imidazole-4-carboxylato-κ7 N 3,O 4:O 4,O 4′:O 1,O 1′:O 1]cadmium(II)] monohydrate], {[Cd2(C15H14N2O4)(C16H14N2O6)(H2O)]·H2O} n or {[Cd2(Hcpimda)(cpima)(H2O)]·H2O} n , (I), were obtained from 1-(4-carboxybenzyl)-2-propyl-1H-imidazole-4,5-dicarboxylic acid (H3cpimda) and cadmium(II) chloride under hydrothermal conditions. The structure indicates that in-situ decarboxylation of H3cpimda occurred during the synthesis process. The asymmetric unit consists of two Cd2+ centres, one 4-carboxy-1-(4-carboxylatobenzyl)-2-propyl-1H-imidazole-5-carboxylate (Hcpimda2−) anion, one 1-(4-carboxylatobenzyl)-2-propyl-1H-imidazole-4-carboxylate (cpima2−) anion, one coordinated water molecule and one lattice water molecule. One Cd2+ centre, i.e. Cd1, is hexacoordinated and displays a slightly distorted octahedral CdN2O4 geometry. The other Cd centre, i.e. Cd2, is coordinated by seven O atoms originating from one Hcpimda2− ligand and three cpima2− ligands. This Cd2+ centre can be described as having a distorted capped octahedral coordination geometry. Two carboxylate groups of the benzoate moieties of two cpima2− ligands bridge between Cd2 centres to generate [Cd2O2] units, which are further linked by two cpima2− ligands to produce one-dimensional (1D) infinite chains based around large 26-membered rings. Meanwhile, adjacent Cd1 centres are linked by Hcpimda2− ligands to generate 1D zigzag chains. The two types of chains are linked through a μ2-η2 bidentate bridging mode from an O atom of an imidazole carboxylate unit of cpima2− to give a two-dimensional (2D) coordination polymer. The simplified 2D net structure can be described as a 3,6-coordinated net which has a (43)2(46.66.83) topology. Furthermore, the FT–IR spectroscopic properties, photoluminescence properties, powder X-ray diffraction (PXRD) pattern and thermogravimetric behaviour of the polymer have been investigated.

A new two-dimensional CdIIcoordination polymer based on 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole and benzene-1,2-dicarboxylate: synthesis, crystal structure and characterization

2017 ◽  
Vol 73 (10) ◽  
pp. 828-832 ◽  
Author(s):  
Huai-Xia Yang ◽  
Yan-Qiu Yang ◽  
Di Cheng ◽  
Ya-Xue Li ◽  
Xiang-Ru Meng
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Spectroscopic Properties ◽  
Organic Ligands ◽  
Two Dimensional ◽  
Coordination Environment ◽  
Dimensional Network ◽  
Ir Spectroscopic

In the construction of coordination polymers, many factors can influence the formation of the final architectures, such as the nature of the metal centres, the organic ligands and the counter-anions. In the coordination polymer poly[aqua(μ-benzene-1,2-dicarboxylato-κ4O1,O1′:O2,O2′)[μ-2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole-κ2N2:N3]cadmium(II)], [Cd(C12H12N4)(C8H4O4)(H2O)]nor [Cd(immb)(1,2-bdic)(H2O)]n, each CdIIion is seven-coordinated by two N atoms from two symmetry-related 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole (immb) ligands, by four O atoms from two symmetry-related benzene-1,2-dicarboxylate (1,2-bdic2−) ligands and by one water molecule, leading to a CdN2O5distorted pentagonal bipyramidal coordination environment. The immb and 1,2-bdic2−ligands bridge CdIIions and form a two-dimensional network structure. O—H...O and N—H...O hydrogen bonds stabilize the structure. In addition, the IR spectroscopic properties, PXRD patterns, thermogravimetric behaviour and fluorescence properties of the title polymer have been investigated.

scholarly journals Poly[[diaquabis[μ4-5-nitroisophthalato-κ4O1:O1:O3:O3′]bis[μ3-pyridine-4-carboxylato-κ3O:O′:N]tricobalt(II)] tetrahydrate]

2012 ◽  
Vol 68 (4) ◽  
pp. m451-m452
Author(s):  
Xia Yin ◽  
Jun Fan ◽  
Jingling Xin ◽  
Shengrun Zheng ◽  
Weiguang Zhang
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Three Dimensional ◽  
Free Water ◽  
Water Molecules ◽  
Two Dimensional ◽  
Lattice Water ◽  
Free Water Molecule ◽  
Carboxylate Groups ◽  
Coordinated Water

The title compound, {[Co3(C6H4NO2)2(C8H3NO6)2(H2O)2]·4H2O}n, exhibits a two-dimensional layer-like structure in which the CoIIions exhibit two kinds of coordination geometries. One nearly octahedral CoIIion with crystallographic inversion symmetry is coordinated to six carboxylate O atoms from four bridging 5-nitroisophthalate (NIPH) ligands and two isonicotinate (IN) anions, while the other type of CoIIion binds with one N atom and one carboxylate O atom from two IN anions, two carboxylate O atoms from two different NIPH anions and one ligated water molecule, displaying a distorted square-pyramidal coordination geometry. Three adjacent CoIIions are bridged by six carboxylate groups from four NIPH ligands and two IN anions to form a linear trinuclear secondary building unit (SBU). Every trinuclear SBU is linked to its nearest neighbours in theabplane, resulting in a two-dimensional layer-like structure perpendicular to thecaxis. Along thea-axis direction neighbouring molecules are connected through carboxylate and pyridyl units of the IN anions, along thebaxis through carboxylate groups of the NIPH ligands. The H atoms of one free water molecule are disordered in the crystal in a 1:1 ratio. Typical O—H...O hydrogen bonds are observed in the lattice, which include the following contacts: (a) between coordinated water molecules and carboxylate O atoms of the NIPH anions, (b) between lattice water molecules and carboxylate O atoms of the NIPH anions, and (c) between coordinated and lattice water molecules. These intermolecular hydrogen bonds connect the two-dimensional layers to form a three-dimensional supramolecular structure.

The three-dimensional coordination polymer poly[[aqua[μ4-2,2′-(diazene-1,2-diyl)dibenzoato]lead(II)] 1,2-bis(pyridin-4-yl)ethylene hemisolvate]

2014 ◽  
Vol 70 (10) ◽  
pp. 934-936 ◽  
Author(s):  
Fengji Ma ◽  
Caixia Yu ◽  
Huijuan Wang ◽  
Feng Zhao
Keyword(s):  
Coordination Polymer ◽  
Water Molecule ◽  
Hydrothermal Reaction ◽  
Three Dimensional ◽  
Aqua Ligand ◽  
Asymmetric Unit ◽  
Carboxylate Groups ◽  
Coordinated Water

A novel three-dimensional coordination polymer, {[Pb(C14H8N2O4)(H2O)]·0.5C12H10N2}n, has been synthesized by hydrothermal reaction of Pb(OAc)2·3H2O (OAc is acetate), 2,2′-(diazene-1,2-diyl)dibenzoic acid (H2L) and 1,2-bis(pyridin-4-yl)ethylene (bpe). The asymmetric unit contains a crystallographically independent PbIIcation, oneL2−ligand, an aqua ligand and half a bpe molecule. Each PbIIcentre is seven-coordinated by six O atoms of bridging–chelating carboxylate groups fromL2−ligands and by one O atom from a coordinated water molecule. The PbIIcations are bridged byL2−ligands, forming [PbO2]nchains along theaaxis. These chains are further connected byL2−ligands along thebandcaxes to give a three-dimensional framework with a 41263topology. The channel voids are occupied by bpe molecules.

scholarly journals Poly[aqua[μ2-1,2-bis(imidazol-1-ylmethyl)benzene-κ2N3:N3′](μ2-5-bromobenzene-1,3-dicarboxylato-κ3O1,O1′:O3)nickel(II)]

2009 ◽  
Vol 65 (6) ◽  
pp. m623-m623
Author(s):  
Kun Zhu ◽  
Hong Chen ◽  
Guang-Xiang Liu
Keyword(s):  
Coordination Polymer ◽  
Water Molecule ◽  
Layer Structure ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Two Dimensional ◽  
Distorted Octahedral ◽  
Coordinated Water

In the two-dimensional title coordination polymer, [Ni(C8H3BrO4)(C14H14N4)(H2O)]n, the NiIIatom adopts a distorted octahedral geometry, being ligated by three O atoms from two different 5-bromobenzene-1,3-dicarboxylate ligands, two N atoms from two 1,2-bis(imidazol-1-ylmethyl)benzene ligands and one coordinated water molecule. The Ni atoms are bridged by the 5-bromobenzene-1,3-dicarboxylate ligands, forming chains, which are further linked by 1,2-bis(imidazol-1-ylmethyl)benzene, generating a layer structure parallel to (001).

A helical zinc(II) coordination polymer assembled from 1,3-bis[(pyridin-3-yl)methoxy]benzene and benzene-1,4-dicarboxylic acid

2014 ◽  
Vol 70 (12) ◽  
pp. 1178-1180 ◽  
Author(s):  
Cai-Xia Yu ◽  
Feng-Ji Ma ◽  
Lei-Lei Liu ◽  
Cong Liu
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Polymer ◽  
Water Molecule ◽  
Dicarboxylic Acid ◽  
Two Dimensional ◽  
One Dimensional ◽  
Hydrogen Bonding Interactions ◽  
Carboxylate Groups ◽  
Corrugated Sheets

Incatena-poly[[aqua[1,3-bis(pyridine-3-ylmethoxy)benzene-κN]zinc(II)]-μ2-benzene-1,4-dicarboxylato-κ2O1:O4], [Zn(C8H4O4)(C18H16N2O2)(H2O)]n, each ZnIIcentre is tetrahedrally coordinated by two O atoms of bridging carboxylate groups from two benzene-1,4-dicarboxylate anions (denotedL2−), one O atom from a water molecule and one N atom from a 1,3-bis[(pyridin-3-yl)methoxy]benzene ligand (denoted bpmb). (Aqua)O—H...N hydrogen-bonding interactions induce the formation of one-dimensional helical [Zn(L)(bpmb)(H2O)]nchains which are interlinked through (aqua)O—H...O hydrogen-bonding interactions, producing two-dimensional corrugated sheets.

A cadmium(II) coordination polymer with both polyrotaxane and polycatenane features constructed by a V-shaped semi-rigid ligand: synthesis and fluorescence properties

2017 ◽  
Vol 73 (7) ◽  
pp. 541-545
Author(s):  
Hua Xie ◽  
Wang-Jian Fang ◽  
Xiao-Qiang Yao
Keyword(s):  
Solid State ◽  
Coordination Polymer ◽  
Water Molecule ◽  
Self Assembly ◽  
Three Dimensional ◽  
The Self ◽  
Two Dimensional ◽  
Photoluminescence Properties ◽  
Hydrothermal Conditions ◽  
Parallel Fashion

One of the most interesting phenomena in coordination polymers (CPs) is the co-existence of different interlaced motifs. However, CPs having two different interlaced motifs at the same time are still rare. Colourless block-shaped crystals of the two-dimensional polymer poly[[aqua(μ2-naphthalene-2,6-dicarboxylato){μ2-4,4′-[oxybis(4,1-phenylene)]dipyridine}cadmium(II)] monohydrate], {[Cd(C12H6O4)(C22H16N2O)(H2O)]·H2O} n , (I), was synthesized under hydrothermal conditions by the self-assembly of 4,4′-[oxybis(4,1-phenylene)]dipyridine (OPY) with CdII in the presence of naphthalene-2,6-dicarboxylic acid (H2ndc). Each CdII ion is six-coordinated by two N atoms from the pyridine rings of two OPY ligands and by four O atoms, three of which are from two ndc2− ligands and one of which is from a water molecule. In (I), every two identical two-dimensional (2D) 63 layers are interpenetrated in a parallel fashion, resulting in an interesting 2D→2D framework with both polyrotaxane and polycatenane characteristics. The extension of these sheets into a three-dimensional supramolecular net is via O—H...O hydrogen bonds. The solid-state photoluminescence properties of (I) are also discussed.

A two-dimensional calcium (II) coordination polymer constructed from 2,2′-[terephthaloylbis(azanediyl)]diacetate: synthesis, structure and properties

2021 ◽  
Vol 77 (11) ◽  
Author(s):  
Huang-Huang Liu ◽  
Chu-Heng Liang ◽  
Yan Liu ◽  
Hong-Tao Zhang
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Polymer ◽  
Excitation Wavelength ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Thermal Stabilities ◽  
Carboxylate Groups ◽  
Weak Interlayer ◽  
Coordinated Water ◽  
Parallel Arrays

A new two-dimensional (2D) coordination polymer, namely, poly[[diaqua-[μ4-2,2′-[terephthaloylbis(azanediyl)]diacetato]calcium(II)] monohydrate], {[Ca(C12H10N2O6)(H2O)2]·H2O} n , (I), has been synthesized by the reaction of CaCl2 with 2,2′-[terephthaloylbis(azanediyl)]diacetic acid (H2 L). The title compound was structurally characterized by single-crystal X-ray diffraction analysis, elemental analysis and IR spectroscopy. In the crystal structure of (I), each CaII cation binds to six carboxylate groups from four symmetry-related L 2− dianions. The hexadentate L 2− ligand links four symmetry-related calcium cations into a 2D layer-like structure, which can be simplified as a uninodal SP 2-periodic (3,6)III net with the point symbol (43·63). In the lattice, all layers pack in parallel arrays through weak interlayer hydrogen bonding and π–π interactions. The thermal stability and photoluminescence properties of (I) have been investigated. Thermogravimetric analysis reveals the different thermal stabilities of the two coordinated water molecules due to their different hydrogen-bonding interactions. The title coordination polymer exhibits an excitation-wavelength-dependent fluorescence in the solid state.

A two-dimensional mixed-valence CuII/CuIcoordination polymer constructed from 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarboxylate

2016 ◽  
Vol 72 (8) ◽  
pp. 652-657 ◽  
Author(s):  
Li-Yang Zhang ◽  
Li-Ping Lu ◽  
Si-Si Feng
Keyword(s):  
Water Molecule ◽  
Self Assembly ◽  
Mixed Valence ◽  
Chemical Properties ◽  
Thermal Conditions ◽  
Axial Position ◽  
Two Dimensional ◽  
Hydrothermal Conditions ◽  
Pyramidal Geometry ◽  
Coordinated Water

Coordination polymers are a thriving class of functional solid-state materials and there have been noticeable efforts and progress toward designing periodic functional structures with desired geometrical attributes and chemical properties for targeted applications. Self-assembly of metal ions and organic ligands is one of the most efficient and widely utilized methods for the construction of CPs under hydro(solvo)thermal conditions. 2-(Pyridin-3-yl)-1H-imidazole-4,5-dicarboxylate (HPIDC2−) has been proven to be an excellent multidentate ligand due to its multiple deprotonation and coordination modes. Crystals of poly[aquabis[μ3-5-carboxy-2-(pyridin-3-yl)-1H-imidazole-4-carboxylato-κ5N1,O5:N3,O4:N2]copper(II)dicopper(I)], [CuIICuI2(C10H5N3O4)2(H2O)]n, (I), were obtained from 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarboxylic acid (H3PIDC) and copper(II) chloride under hydrothermal conditions. The asymmetric unit consists of one independent CuIIion, two CuIions, two HPIDC2−ligands and one coordinated water molecule. The CuIIcentre displays a square-pyramidal geometry (CuN2O3), with twoN,O-chelating HPIDC2−ligands occupying the basal plane in atransgeometry and one O atom from a coordinated water molecule in the axial position. The CuIatoms adopt three-coordinated Y-shaped coordinations. In each [CuN2O] unit, deprotonated HPIDC2−acts as anN,O-chelating ligand, and a symmetry-equivalent HPIDC2−ligand acts as an N-atom donorviathe pyridine group. The HPIDC2−ligands in the polymer serve as T-shaped 3-connectors and adopt a μ3-κ2N,O:κ2N′,O′:κN′′-coordination mode, linking one CuIIand two CuIcations. The Cu cations are arranged in one-dimensional –Cu1–Cu2–Cu3– chains along the [001] direction. Further crosslinking of these chains by HPIDC2−ligands along thebaxis in a –Cu2–HPIDC2−–Cu3–HPIDC2−–Cu1– sequence results in a two-dimensional polymer in the (100) plane. The resulting (2,3)-connected net has a (123)2(12)3topology. Powder X-ray diffraction confirmed the phase purity for (I), and susceptibilty measurements indicated a very weak ferromagnetic behaviour. A thermogravimetric analysis shows the loss of the apical aqua ligand before decomposition of the title compound.

A two-dimensional CdII coordination polymer with 2,2′-(disulfanediyl)dibenzoate and 1,10-phenanthroline ligands

2014 ◽  
Vol 70 (5) ◽  
pp. 517-521
Author(s):  
Yu-Xiu Jin ◽  
Fang Yang ◽  
Li-Min Yuan ◽  
Chao-Guo Yan ◽  
Wen-Long Liu
Keyword(s):  
Coordination Polymer ◽  
Three Dimensional ◽  
Phen Ligand ◽  
Supramolecular Architecture ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Carboxylate Groups ◽  
Phenanthroline Ligand ◽  
Phenanthroline Ligands

In poly[[μ3-2,2′-(disulfanediyl)dibenzoato-κ5 O:O,O′:O′′,O′′′](1,10-phenanthroline-κ2 N,N′)cadmium(II)], [Cd(C14H8O4S2)(C12H8N2)] n , the asymmetric unit contains one CdII cation, one 2,2′-(disulfanediyl)dibenzoate anion (denoted dtdb2−) and one 1,10-phenanthroline ligand (denoted phen). Each CdII centre is seven-coordinated by five O atoms of bridging/chelating carboxylate groups from three dtdb2− ligands and by two N atoms from one phen ligand, forming a distorted pentagonal–bipyramidal geometry. The CdII cations are bridged by dtdb2− anions to give a two-dimensional (4,4) layer. The layers are stacked to generate a three-dimensional supramolecular architecture via a combination of aromatic C—H...π and π–π interactions. The thermogravimetric and luminescence properties of this compound were also investigated.

scholarly journals Poly[μ2-aqua-bis[μ4-2-(1H-1,2,3-benzotriazol-1-yl)acetato]dipotassium]

2012 ◽  
Vol 68 (4) ◽  
pp. m379-m379 ◽  
Author(s):  
Qiong Liu
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Rotation Axis ◽  
Aqua Ligand ◽  
Octahedral Geometry ◽  
Two Dimensional ◽  
Compound K ◽  
Bridging Ligands ◽  
Carboxylate Groups

In the title compound, [K2(C8H6N3O2)2(H2O)]n, each K+ion is seven-coordinated by one O atom from a bridging water molecule, five carboxylate O atoms and one N atom from a benzotriazole group, forming a distorted mono-capped octahedral geometry. In the crystal, the carboxylate groups act as bridging ligands, forming a two-dimensional polymer parallel to (001). The aqua ligand, which lies on a twofold rotation axis, forms intermolecular O—H...O hydrogen bonds within these layers.

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