Under hydrothermal conditions, a new two-dimensional (2D) zinc coordination polymer, [Zn(tdc)(bimm)]n, was synthesized based on thiophene-2,5-dicarboxylic acid (H2tdc) and 1,2-bis(imidazol-1′-yl)methane (bimm) mixed ligands. Single crystal X-ray structural analysis shows adjacent Zn2+ ions are connected by tdc2? anions to form a one-dimensional (1D) [ZnL]n chain in the complex. Then flexible bimm ligands expand 1D chains into a 2D layer by linking neighboring Zn2+ ions. These adjacent layers are further stacked together by direct C?H···π supramolecular interactions, generating a double-layer 2D supramolecular structure. In topology, the 2D lay could be rationalized to a uninodal 4-connected non-interpenetrated sql net with {44.62} topology. In addition, solid state properties such as thermogravimetric analysis and luminescence were also investigated. 相似文献
A new cadmium coordination polymer, formulated as [Cd(L)(phen)]n, were prepared by hydrothermal reactions based on 3,4-dibromothiophene-2,5-dicarboxylic acid (H2L) and 1,10-phenanthroline (phen) mixed organic linkers. In the complex, adjacent Cd2+ ions are linked by L2? anions to form a one-dimensional (1D) [CdL]n chain with [Cd2(COO)2] as the secondary building unit (SBU). These adjacent chains are further stacked together by direct C?Br···Br halogen bonds interactions, generating a two-dimensional (2D) supramolecular structure. From the viewpoint of topology, the 2D supramolecular network can be rationalized to a 3,4-connected 3,4L13 net with {4.62}2{42.62.82} topology. 相似文献
A new cadmium(II) coordination polymer, [Cd(ntdc)(dps)·H2O]n, was synthesized using 3-nitro-thiophene-2,5-dicarboxylic acid (H2ntdc) and 4,4´-dipyridylsulfide (dps) as organic linkers. In the complex, adjacent Cd2+ ions are linked by ntdc2? anions adopting a new coordination mode to form a one-dimensional (1D) [Cd(ntdc)]n chain. Then dps ligands further expand the 1D chain into a corrugated two-dimensional (2D) layer network by linking neighboring Cd2+ ions. Topologically, the 2D network can be rationalized to a 3,5-connected 3,5L2 topology. Moreover, solid state properties such as thermogravimetric analysis and photoluminescent property were also investigated. 相似文献
Two new Co(II) coordination polymers, [Co(Hnbta)(bth)]n ( 1 ) and {[Co3(nbta)2(bth)3(H2O)]·H2O}n ( 2 ), (H3nbta = 5‐nitro‐1,2,3‐benzenetricarboxylic acid and bth = 1,6‐bis(1,2,4‐triazole‐1‐yl)hexane), have been synthesized under different pH values through hydrothermal reactions. Both complexes were characterized by elemental analysis, IR spectra, thermogravimetric analysis (TGA), and single‐crystal X‐ray crystallography. Complex 1 exhibits a 3D polythreaded network based on 4‐connected sql 2D layer. Complex 2 has a (4,4,5)‐connected trinodal 3D pillar‐layered network with a (42·64)2(42·67·8)2(64·82) topology. Magnetic susceptibility measurements indicate that complexes 1 and 2 show weak antiferromagnetic interactions between the adjacent Co(II) ions. 相似文献
Assembly of 5‐methoxyisophthalic acid (H2moip) with cadmium(II) ions in the presence of neutral ancillary 1,3‐bis(4‐pyridyl)propane (bpp) yields a new coordination polymer, [Cd(moip)(bpp)(H2O)]n·nH2O ( 1 ). X‐ray single‐crystal diffraction determination reveals that complex 1 crystallizes in the space group C2/c of monoclinic crystal system: a = 14.545(2), b = 18.749(3), c = 17.359(3) Å, β = 105.480(2)º. Complex 1 is a 4‐connected 3D diamondoid topological framework with a 2‐fold interpenetration. Interestingly, the dense adamantine cages with inherent microporous structure are filled with free water molecules to further stabilize the coordination network. 相似文献
In our efforts to investigate the relationships between the metal ions and the structures of their complexes based on N-donor ligand, 1-(4-pyridylmethyl)-1H-benzimidazole (L), and their complexes [Ag(L)(ClO4)]n (1),{[Cu(L)2 (ClO4)2](H2O)2}n (2) were synthesized and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction analysis. Structural analyses show that 1 possess one-dimensional (1D) double helix chain structure, which further forms two-dimensional supramolecular framework connected by Ag···Ag and Ag···O weak interactions. When the metal ion was changed to Cu(II), 2 was obtained, which shows a two-fold interpenetrating three-dimensional diamond network. The results show that the metal ions and weak interactions play important roles in the construction of such coordination architectures. X-ray powder diffractions show that the bulk synthesized materials and the crystals used for diffraction are homogeneous. Meanwhile, the photoluminescent property of the complex 1 is investigated in the solid state at room temperature. 相似文献
Abstract A new complex [Co(H2pztc)(bpy)H2O] (H4pztc = pyrazine-2,3,5,6-tetracarboxylic acid, bpy = 2,2′-bipyridine) has been synthesized by hydrothermal reactions of Co(NO3)2 · 6H2O with H4pztc and bpy and characterized by IR and X-ray diffraction single crystal structure analysis. It belongs to monoclinic system,
P21/c space group with a = 13.454(2) ?, b = 12.939(2) ?, c = 11.4993(19) ?, α = 90°, β = 111.640(3)°, γ = 90°. This complex is assembled into 3D supramolecular architecture by hydrogen bonds (O–H···O, C–H···O).
Index Abstract A new complex of cobalt(II) with pyrazine-2,3,5,6-tetracarboxylic acid and 2,2′-bipyridine is assembled by intermolecular
hydrogen bonds forming 2D layer and 3D supramolecular network.
相似文献
A new Cu(II) coordination polymer [Cu(3,5-pdc)(H2O)4·H2O]n1 (3,5-pdc=3,5-pyridinedicarboxylic acid) has been synthesized by hydrothermal method and characterized by IR, elemental analysis,
TG technique and X-ray crystallography. The crystallographic data for the compound 1: monoclinic P21/n, a = 11.361(5) ?, b = 7.095(3) ?, c = 14.575(6) ?, β = 107.630(4)°, V = 1,119.7(8) ?3, Z = 4, Dc = 1.891 Mg/m3, F(000) = 652, R1 = 0.0374, wR2 = 0.1083. Cu(II) atom has an distorted octahedral environment with N2O4 donor set of Cu(1) and O6 donor set of Cu(2), respectively. Each ligand is bound to two Cu(II) ions and each copper atom is coordinated by two ligands
thereby generating a 1D zigzag chain. The 1D chain was interacted each other feathering three-dimensional supramolecular network
through π···π interactions and multiform intermolecular hydrogen bonds. The luminescent properties of the title complex in
the solid state were investigated. 相似文献
Three new complexes, namely [Zn(mbix)(SO4)]·CH3OH (1), Cd(mbix)2(NO3)2 (2) and [Cd(mbix)2(H2O)2]·(NO3)2 (3), have been obtained by reactions of flexible bidentate ligand 1,3-bis(imidazol-1-ylmethyl)benzene (mbix) with corresponding
zinc(II) and cadmium(II) salts. The structures of these complexes have been determined by the X-ray single crystal diffraction
analysis. Complex 1 features a 2D wavy network with (4,4) topology. Complex 2 has a 2D grid network with left- and right-handed helical chains, while complex 3 exhibits twofold parallel interpenetration structure. The differences of three complexes demonstrate that the coordination
geometry of metal ions and the ratio of reactants have a great impact on the structure of the supramolecular architectures.
The luminescent properties of three complexes are also investigated. 相似文献
Synthesis and structural characterization of two heterodinuclear ZnII-LnIII complexes with the formula [ZnLn(HL)(µ-OAc)(NO3)2(H2O)x(MeOH)1-x]NO3 · n H2O · n MeOH [Ln?=?Pr (1), Nd (2)] and the crystal and molecular structure of [ZnNd(HL)(µ-OAc)(NO3)2(H2O)] [ZnNd(HL)(OAc)(NO3)2(H2O)](NO3)2 · n H2O · n MeOH (3) are reported. The asymmetrical compartmental ligand (E)-2-(1-(2-((2-hydroxy-3-methoxybenzylidene)amino)-ethyl)imidazolidin-2-yl)-6-methoxyphenol (H2L) is formed from N1,N3-bis(3-methoxysalicylidene)diethylenetriamine (H2valdien) through intramolecular aminal formation, resulting in a peripheral imidazoline ring. The structures of 1–3 were revealed by X-ray crystallography. The smaller ZnII ion occupies the inner N2O2 compartment of the ligand, whereas the larger and more oxophilic LnIII ions are found in the outer O2O2’ site.
Graphic Abstract
Synthesis and structural characterization of two heterodinuclear ZnII-LnIII complexes (Ln?=?Pr, Nd) bearing an asymmetrical compartmental ligand formed in situ from N1,N3-bis(3-methoxysalicylidene)diethylenetriamine (H2valdien) through intramolecular aminal formation are reported.
A novel metal-organic supramolecular complex [Zn2 (Zaltoprofen)2(phen)2] (where Zaltoprofen = 5-(1-carboxyethyl)-2-(phenylthio)phenylacetic acid, phen = 1,10-phenanthroline) has been synthesized under hydrothermal condition and characterized by single crystal X-ray diffraction, elemental analysis, spectral method (IR), powder X-ray diffraction (XRD), electronic Spectra (UV-vis), and fluorescent properties. The compound crystallizes in the monoclinic P2(1)/c space group. [Zn2(Zaltoprofen)2(phen)2] features 0-D structural, the π–π stacking interactions and C?H···O hydrogen-bonds play a vital role in determining the crystal packing and construction of the extended 3-D supramolecular network. 相似文献
A new coordination polymer [Ni2(L)(H2btec)]n, (1) was obtained from the reaction of NiSO4·6H2O, macrocyclic ligand 3,6,9,17,20,23-hexaaza-29,30-dihydroxy-13,27-di-tert-butyl-tricyclo[23,3,1,111,15]triaconta-1(28),11,13,15(30),25,26-hexaene (H2L), and 1,2,4,5-benzenetetracarboxylic acid (H4btec) in methanol. Its structure was determined by X-ray diffraction analysis. The crystal is monoclinic C2/c space group with cell parameters a = 20.4923(3) ?, b = 14.2389(3) ?, c = 14.5130(2) ?, β = 97.441(2)°, V = 4199.05(12) ?3, and Z = 8. The X-ray analysis shows that each Ni (II) cation is six-coordinated by an O3N3 donor set. The macrocyclic complex [Ni2L] 2+ are bridged by H2btec2− anions to form 1D chains, which are further joined via N–H···O hydrogen bonds to yield a 3D supramolecular structure. Thermogravimetric
analysis (TGA) for the complex is discussed. 相似文献
Two Ag(I)-based coordination polymers, namely [Ag2(3,3′-tmbpt)(o-Hbdc)2]·H2O (1) and [Ag8(3,3′-tmbpt)4(1,2,4-Hbtc)4(H2O)] (2) (3,3′-tmbpt?=?1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole, o-H2bdc?=?1,2-benzenedicarboxylic acid and 1,2,4-H3btc?=?1,2,4-benzenetricarboxylic acid), have been synthesized. Single-crystal X-ray diffraction analyses, elemental analyses, infrared spectra, powder X-ray diffraction analyses and thermogravimetric analyses have been carried out to characterize the structures of 1 and 2. Compound 1 shows a (3,4)-connected 2D layered structure with a Schläfli symbol of (42·6)(42·63·8). The intermolecular O–H···O hydrogen-bonding interactions extend the 2D layer into a 3D supramolecular architecture. Compound 2 exhibits a (3,3)-connected double-layered structure with a Schläfli symbol of (4·8·10)2(82·10)2. The intermolecular C–H···O hydrogen-bonding interactions link the double-layers to form a 3D supramolecular architecture. Moreover, there are intramolecular and intermolecular π–π interactions in 1 and 2, which stabilize the whole 3D supramolecular architectures. The band gaps of 1 and 2 are 3.19 and 3.09 eV, respectively, indicating the potential of 1 and 2 as semiconductive materials with wide band gaps. Moreover, 1 and 2 emit intense blue-green light, which may be potential photoactive materials.
Graphic Abstract
Two Ag(I)-based 3D supramolecular coordination polymers constructed from a multidentate N-donor ligand and two aromatic polycarboxylate anions via hydrogen-bonding and π–π interactions have been synthesized and characterized. The band gaps and photoluminescent properties of the compounds have been studied.
Three new polymeric frameworks, [Ni(bbbm)(L1)2]n (1), [Ni(bbbm)(L2)2]n (2), and {[Co(bbbm)(L3)]·H2O}n (3) (bbbm = 1,4-bis(N-benzimidazolyl) butane, HL1 = 4-bromobenzoic acid, HL2 = 3-methylbenzoic acid, and H2L3 = glutaric acid) have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction.
Complex 1 features a one-dimensional (1D) linear chain structure bridged by bbbm ligands, which is further connected into a supramolecular
double chain structure through intermolecular π–π stacking interactions. Complex 2 contains 1D zigzag chain, which is further arranged into a 2D supramolecular architecture by hydrogen bonding and π–π stacking
interactions. In the structure of 3, there are infinite 1D zigzag Co(II)-bbbm chains linked together by L3 ligands to generate an undulated 2D (4,4) sheet, which
is further connected by intermolecular π–π stacking interactions to form a 3D supramolecular network. Furthermore, thermal
stability and luminescent property of 1–3 were investigated. 相似文献
The title compound, [Cu(C10H8N2)(HCO2)2]n, in which the asymmetric unit contains one crystallographically independent copper(II) ions, one formate and half of 4, 4′-bipy
molecules, has a linear polymeric structure, with the bridging ligand 4, 4′-bipyridine connecting the CuII ions. Each ion lies on an inversion center and has a distorted octahedral environment, being coordinated by two bipy ligands
and four oxygen atoms from two formate groups. The O1 in the formate group is disordered over two sites with occupancy of
0.55 and 0.45. In the crystal structure, the linear polymeric chains are linked by intermolecular C–H···O hydrogen bonds,
resulting in a two-dimensional supramolecular network. 相似文献