Showing papers on "Coordination polymer published in 2001"
TL;DR: In this article, a 3D open-framework coordination polymeric polygonal poly(pymo-N1,N3)2] poly(n3) was obtained in the presence of ammonium and perchlorate ions and water molecules in the pores.
Abstract: Reaction of CuX2 (X = NO3, Cl, (SO4)1/2) salts and Hpymo·HX (Hpymo = 2-hydroxypyrimidine; X = Cl, NO3) in aqueous amine solutions (amine = NH3, CH3NH2) leads to formation of the poorly crystalline three-dimensional open-framework coordination polymer [Cu(pymo-N1,N3)2]∞ (1). Under the same reaction conditions, but in the presence of amine and group 1 metal salts of single charged voluminous anions, highly crystalline clathrates of the type {[Cu(pymo-N1,N3)2]·(AX)1/3}∞ (1·AX with A = NH4, CH3NH3, Li, K, Rb; X = ClO4, BF4, PF6) are obtained. The X-ray crystal structure of 1·NH4ClO4 reveals that the combination of square-planar Cu2+ ion with 120° bond angles provided by Hpymo generates a three-dimensional porous [Cu(pymo-N1,N3)2]∞ framework with ammonium and perchlorate ions and water molecules included in the pores. 1 possesses a rich host−guest chemistry. Indeed, N2 sorption at 77 K by empty host 1 reveals its microporous nature with a BET surface area of ca. 200 m2 g-1. Hydrated 1 loses water upon heating ...
222 citations
TL;DR: A new condensed three-dimensional structure Er4(bdc)6·6H2O was synthesized by the hydro(solvo)thermal method as mentioned in this paper, and a probable explanation of the structure change was also investigated.
Abstract: A new condensed three-dimensional structure Er4(bdc)6·6H2O was synthesized by the hydro(solvo)thermal method. A probable explanation of the structure change was also investigated.
177 citations
TL;DR: Two isostructural vanadium(IV) coordination polymers [VO(dod)2]X2 [X=Cl, Br; dod=1,4-diazoniabicyclo[2,2-2] octane-1, 4-diacetate (C10H16N2O4)] have been synthesized solvothermally and determined by single-crystal X-ray analysis as discussed by the authors.
129 citations
TL;DR: The crystal structure of the coordination polymer [Mn3(N3)2(nta)4(H2O)2]n (nta = nicotinate) consists of trinuclear subunits bridged by mixed μ-1,1-azide and μ-carboxylate-O,O groups, which are linked by μ3-nta-N,O, O ligands into a three-dimensional network exhibiting ferrimagnetic-like ordering as discussed by the authors.
116 citations
TL;DR: The ligands N,N′-bis(3-pyridinecarboxamide)-1,2-ethane (L) was designed to form coordination polymers capable of assembling into 2-dimensional network via complementary amide hydrogen bonds.
Abstract: The ligands N,N′-bis(3-pyridinecarboxamide)-1,2-ethane (L) was designed to form coordination polymers capable of assembling into 2-D network via complementary amide hydrogen bonds. The reactions of L with AgX (X = ClO4−, CF3SO3− or NO3−), Zn(ClO4)2·6H2O and Cd(ClO4)2·6H2O produced coordination polymers 1–5,the structures of which were characterized by single crystal X-ray diffraction. The polymer {[AgL][ClO4]}∞ crystallized in two polymorphs 1A and 1B which consisted of coordination polymers {[AgL]+}∞ in sine-wave and zigzag conformations,
respectively. In addition, the X-ray crystal structures of {[AgL][CF3SO3]}∞ (2) and {[AgL][NO3](H2O)1.25}∞ (3) showed coordination polymers in zigzag conformation similar to that of 1B. The polymers in compounds 1, 2 and 3 aggregate via complementary amide hydrogen bonds, forming corrugated sheets in the solid state. Furthermore, the compound trans-{[ZnL2(H2O)2][ClO4]2·(H2O)2·CH3CN}∞ (4) was shown to be an infinite chain of [Zn2L2]
metallacycles. The stacking of the Zn polymer leads to the formation of a channel-like structure. The coordination polymer {[CdL(H2O)3][ClO4]2}∞ (5) shows zigzag chains which are linked through hydrogen bonds between the anion, amide groups and coordinated water molecules. In contrast to its isomer L, the ligand N,N′-bis(2-pyridinecarboxamide)-1,2-ethane (L1) formed segregated Ag(I) coordination polymer (6) in which the Ag ion is four coordinate.
114 citations
TL;DR: The new ligands C(6)H(4) (pz = pyrazolyl ring), 1 (ortho), 2 (meta), and 3 (para), that can potentially bond two or more metal centers were obtained in a single step from the reaction of the appropriate dibromoxylene, 2 equiv of tris-2, 2,2-(1-pyrazolyL)ethanol, and excess NaH.
Abstract: The new ligands C6H4[CH2OCH2C(pz)3]2 (pz = pyrazolyl ring), 1 (ortho), 2 (meta), and 3 (para), that can potentially bond two or more metal centers were obtained in a single step from the reaction of the appropriate dibromoxylene, 2 equiv of tris-2,2,2-(1-pyrazolyl)ethanol, and excess NaH. Although the arrangement of the tris(pyrazolyl)methane units in the solid-state structures of 1 and 3 are similar, the orientation of these groups with respect to the phenyl ring are different, with 1 showing a twisted structure and 3 a stepped structure. The reaction of [Cd2(THF)5][BF4]4 with the appropriate ligand yields each of the three coordination polymers of the formula {C6H4[CH2OCH2C(pz)3]2Cd}(BF4)2}n, 4 (ortho), 5 (meta), and 6 (para). In the solid-state structures of all three each tris(pyrazolyl)methane unit is tridentate, with each ligand bonded to two different cadmium(II) atoms, forming a coordination polymer containing 6-coordinate, pseudooctahedral cadmium(II) centers. Polymers 4 and 5 form wavelike chain...
113 citations
TL;DR: In this article, a metal-ligand complex has been synthesized and structurally characterized by single crystal X-ray crystallography, showing that it possesses a novel, two-dimensional polymeric structure.
Abstract: A metal-ligand complex [Fe(phen)(μ6-bta)1/2]n (phen = 1,10-phelanthroline; bta = benzene-1,2,4,5-tetracarboxylate ligand) has been hydrothermally synthesized and structurally characterized by single crystal X-ray crystallography, showing that it possesses a novel, two-dimensional polymeric structure.
107 citations
TL;DR: The coordination polymers [M(dca)2pyz] (M 5 Mn, Fe, Co, Ni, Zn) have been synthesized and characterized by singlecrystal and powder X-ray di4raction Two isomers have been observed.
106 citations
TL;DR: A coordination polymer with a novel structural motif consisting of stacks of infinite ladders inter penetrated by bundles of infinite chains is described; geometrical arguments are made for the requirements that can lead to such interpenetration as a function of ligand dimensions.
105 citations
TL;DR: The reaction of Cd(OH)2 with 3,3′-azodibenzoic acid affords an unprecedented anionic chiral diamondoid network, bis(3, 3′-enzoniate)cadmium·(H2NMe2)·(NH4) which contains eight-coordinate cadmium and displays strong SHG response and enantioselectivity for organic amines.
Abstract: The reaction of Cd(OH)2 with 3,3′-azodibenzoic acid affords an unprecedented anionic chiral diamondoid network, bis(3,3′-azodibenzoate)cadmium·(H2NMe2)·(NH4) which contains eight-coordinate cadmium and displays strong SHG response and enantioselectivity for organic amines
103 citations
TL;DR: In this paper, a planar chirality was induced by intramolecular π-stacking interactions upon complexation with======silver(I) and crystallisation, to give a single-stranded helix with a nanoscale pitch which assembled into a three-dimensional network.
TL;DR: The treatment of MCl(2)O (M = Ca, Sr, or Ba) with 2-mercaptobenzoic acid (H-2-MBA) in a 1:2 ratio in an EtOH/H( 2)O/NH(3) mixture leads to the formation of extended polymeric solids.
Abstract: The treatment of MCl(2).nH(2)O (M = Ca, Sr, or Ba) with 2-mercaptobenzoic acid (H-2-MBA) in a 1:2 ratio in an EtOH/H(2)O/NH(3) mixture leads to the formation of extended polymeric solids [[Ca(OOCC(6)H(4)SSC(6)H(4)COO)(H(2)O)(2)].0.5(C(2)H(5)OH)](n)(1), [[Sr(OOCC(6)H(4)SSC(6)H(4)COO)(H(2)O)(2)].0.5(C(2)H(5)OH)](n)(2), and [[Ba(2)(OOCC(6)H(4)SSC(6)H(4)COO)(2)(H(2)O)(2)].0.5H(2)O](n)(3), respectively. In all of the cases, under the reaction conditions employed, the H-2-MBA ligand undergoes thiol oxidation to form 2,2'-dithiobis(benzoic acid) (H(2)-DTBB). While the DTBB forms a 1:1 complex with heavier alkaline earth metals (1-3), only an ammonium salt, [(HOOCC(6)H(4)SSC(6)H(4)COOH)(HOOCC(6)H(4)SSC(6)H(4)COONH(4))] (4), was obtained as the final product in the reaction of H-2-MBA with MgCl(2).6H(2)O. Compounds 1-4 have been characterized with the aid of elemental analysis, thermal analysis, and infrared spectroscopic studies. All of the products are found to be thermally stable and do not melt on heating to 250 degrees C. Thermogravimetry on complexes 1-3 indicates the loss of coordinated and lattice water/solvent molecules below 200 degrees C (for complex 2) or 350 degrees C (for complexes 1 and 3). The solid-state structures of all of the derivatives 1-4 have been established by single-crystal X-ray diffraction studies. The calcium and strontium coordination polymers 1 and 2 are isomorphous. The DTBB ligands in 1 and 2 are hexadentate, and the compounds have a channel structure in which solvent ethanol molecules are included. In compound 3, barium ion forms a complex 3-dimensional coordination polymer where both the carboxylate and the sulfur centers of the DTBB ligands (which are hepta- and octadentate) coordinate to the metal.
TL;DR: A three-dimensional coordination polymer was synthesized from porous copper(II) terephathlate and triethylenediamine (TED) as a pillar ligand, which has a higher porosity and higher capacity for methane adsorption than zeolites and porous coordination polymers reported previously as mentioned in this paper.
Abstract: A three-dimensional coordination polymer was synthesized from porous copper(II) terephathlate and triethylenediamine (TED) as a pillar ligand, which has a higher porosity and higher capacity for methane adsorption than zeolites and porous coordination polymers reported previously.
TL;DR: In this paper, a 3:2 dppa/AgX ratios (X=SbF6, BF4, O3SCF3 or NO3) were found to lead selectively to new triply bridged cage complexes.
Abstract: [M2L3] coordination cages and linear [M2L3]∞ polymers of the rigid, bridging diphosphines bis(diphenylphosphino)acetylene (dppa) and trans-1,2-bis(diphenylphosphino)ethylene (dppet) with silver(I) salts have been investigated in the solution and solid states. Unlike flexible diphosphines, 1:1 dppa/AgX mixtures do not selectively form discrete [Ag2(diphos)2(X)2] macrocycles; instead dynamic mixtures of one-, two- and three-coordinate complexes are formed. However, 3:2 dppa/AgX ratios (X=SbF6, BF4, O3SCF3 or NO3) do lead selectively to new [M2L3] triply bridged cage complexes [Ag2(dppa)3(X)2] 1 a–d (X=SbF6a, BF4b, O3SCF3c, NO3d), which do not exhibit Ag−P bond dissociation at room temperature on the NMR time scale (121 MHz). Complexes 1 a–d were characterised by X-ray crystallography and were found to have small internal cavities, helical conformations and multiple intramolecular aromatic interactions. The nucleophilicity of the anion subtly influences the cage shape: Increasing nucleophilicity from SbF6 (1 a) through BF4 (1 b) and O3SCF3 (1 c) to NO3 (1 d) increases the pyramidal distortion at the AgP3 centres, stretching the cage framework (with Ag⋅⋅⋅Ag distances increasing from 5.48 in 1 a to 6.21 A in 1 d) and giving thinner internal cavities. Crystal packing strongly affected the size of the helical twist angle, and no correlation between this parameter and the Ag–Ag distance was observed. When crystalline 1 c was stored in its supernatant for 16 weeks, conversion occured to the isostoichiometric [M2L3]∞ coordination polymer [Ag(dppa)2Ag(dppa)(O3SCF3)2]∞ (1 c′). X-ray crystallography revealed a structure with ten-membered Ag2(dppa)2 rings linked into infinite one-dimensional chains by a third dppa unit. The clear structural relationship between this polymer and the precursor cage 1 c suggests a novel example of ring-opening polymerisation. With dppet, evidence for discrete [M2L3] cages was also found in solution, although 31P NMR spectroscopy suggested some Ag−P bond dissociation. On crystallisation, only the corresponding ring-opened polymeric structures [M2L3]∞ could be obtained. This may be because the greater steric bulk of dppet versus dppa destabilises the cage and favours the ring-opening polymerisation.
TL;DR: In this article, the meso-helix structure of a mesohelix was determined from a mixture of dichloromethane/hexane and a one-dimensional coordination polymer.
Abstract: Reaction of achiral [Cu2(H3CCN)2(mu-pydz)3][PF6]2 (1) (pydz = pyridazine) with bidendate 1,3-bis(diphenylphosphanyl)propane (2) in acetonitrile at room temperature in a 1:1 ratio yielded the mononuclear copper(I) complex [Cu[CH2(CH2PPh2)2]2][PF6] (3) together with new one-dimensional coordination polymer 1 to infinity[[Cu(mu-pydz)2][PF6]] (4). Air-sensitive single crystals of 4, suitable for X-ray structure determination, were grown from a mixture of dichloromethane/ hexane [crystal system: monoclinic; space group: C2/c: a = 21.910(3), b = 12.130(2), c = 25.704(3) A,beta = 110.08(10) degrees, V = 6416.65(16) A3]. The one-dimensional coordination polymer 1 to infinity[[Cu(mu-pydz)2][PF6]] (4) exhibits as outstanding feature the rare structure of a meso-helix.
TL;DR: In this article, the properties of Cu(2,5-PDC) and 2,4-PDCH2 have been determined by X-ray diffraction, showing strong antiferromagnetic coupling between the paramagnetic Cu(II) metals in adjacent layers.
TL;DR: An unprecedented triple-layer 2-D open-framework metal−organic polymer, stack interlocked into a 3-D structure, was synthesized via a self-assembly reaction under hyrodthermal conditions.
Abstract: An unprecedented triple-layer 2-D open-framework metal−organic polymer, stack interlocked into a 3-D structure, was synthesized via a self-assembly reaction under hyrodthermal conditions.
TL;DR: In this paper, the linking of two-dimensional honeycomb networks with a four-aminopyridine ligand leads to a three-dimensional molecular framework, similar to CFx.
TL;DR: Cyano-mediated interaction of the alternating high-spin Mn(II) centers and low-spin Ru(III) centers in {Mn[Ru(acac)2 (CN)2 ]2 }n (Hacac=acetylacetone) results in long-range ferromagnetic ordering below 3.6 K.
Abstract: Cyano-mediated interaction of the alternating high-spin Mn(II) centers and low-spin Ru(III) centers in {Mn[Ru(acac)2 (CN)2 ]2 }n (Hacac=acetylacetone) results in long-range ferromagnetic ordering below 3.6 K. This novel Mn(II) Ru(III) coordination polymer, which has a diamond-like structure, was constructed from [Ru(acac)2 (CN)2 ](-) and Mn(2+) ions.
TL;DR: In this article, a uniquely structured homogeneous coordination polymer of a Zn(II)-tetrapyridylporphyrin derivative, is also reported, which correspond, respectively, to the wheel-and-axle and shish-kebab shapes of the supramolecular scaffolds.
Abstract: Axial coordination to metalloporphyrins is an important tool in the supramolecular chemistry of these entities. Metalated 5,10,15,20-tetraphenylporphyrins can be axially linked to each other with the aid of amine and diamine ligands. Seven new crystalline materials consisting of such heterogeneous coordination oligomers and polymers of Zn(II)– or Mn(III)–tetraphenylporphyrins have been prepared and characterized by X-ray crystallography. Ligands of varying length have been used as bridging auxiliaries between the metal centers of the porphyrin species, effecting heterogeneous porphyrin-ligand oligomeric as well as polymeric assemblies. These correspond, respectively, to “wheel-and-axle” and “shish-kebab” type shapes of the supramolecular scaffolds. In addition, a uniquely structured homogeneous coordination polymer of a Zn(II)–tetrapyridylporphyrin derivative, is also reported.
TL;DR: In this article, a coordination polymer with the Au(I)-mediated ferromagnetic interactions has been proposed and the structure illustrates that aurophilicity is a powerful tool to increase the dimensionality of a polymeric system.
TL;DR: X-ray structure analysis confirmed an overall linear structure, in which the lone electron pairs of piperazine-N are in transposition as mentioned in this paper, and the zigzag polymer with Hg2+ was readily obtained in THF Bpmp.
TL;DR: Assembly of octahedral cobalt(II) ion with semirigid exobidentate ligand 1,4-bis(benzimidazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene L affords coordination polymer [CoL3](ClO4)2, 1, which was revealed by X-ray single-crystal structural analysis to have a 2D open network with unusual (3, 6
Abstract: Assembly of octahedral cobalt(II) ion with semirigid exobidentate ligand 1,4-bis(benzimidazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene L affords coordination polymer [CoL3](ClO4)2, 1, which was revealed by X-ray single-crystal structural analysis to have a 2D open network with unusual (3, 6) topology.
TL;DR: In this paper, single crystals of the copper(II) chain of formula [(μ-1,1,3-N3)2{Cu2(ampy)2(N 3 )2]n (ampy=1-(2-aminoethyl)pyrrolidine) were prepared and characterized by X-ray diffraction methods.
TL;DR: A linear coordination polymer composed of diarylethene and hexafluoroacetylacetonato) zinc(II) has been synthesized and photochromism in the single-crystalline phase studied by polarized ======¯¯¯¯absorption spectroscopy.
TL;DR: X-ray analysis of the title compound revealed infinite helical chains of [Ag(SalGly)] units linked through monatomic carboxylate bridges, forming a double helix in the crystal packing.
Abstract: X-ray analysis of the title compound revealed infinite helical chains of [Ag(SalGly)] units (SalGly = α-N-(o-hydroxybenzyl)glycinate) linked through monatomic carboxylate bridges. In the crystal pa...
TL;DR: In this article, a self-assembly of a copper(II) complex of 2,2′-bipy and a nickel(II), tren complex of tren with 4,4′-Bipy was shown to have a distorted octahedral coordination geometry.
Abstract: The one-dimensional coordination polymers [Cu(NO3)2(2,2′-bipy)(4,4′-bipy)]n·2nCH3OH (1) and [Ni(tren)(4,4′-bipy)]n(ClO4)2n (2), have been synthesized by the self-assembly of a copper(II) complex of 2,2′-bipy and a nickel(II) complex of tren with 4,4′-bipy (2,2′-bipy = 2,2′-bipyridine, 4,4′-bipy = 4,4′-bipyridine, and tren = tris-(2-aminoethyl)amine). Their X-ray crystal structures show that the metal ions in 1 and 2 display a distorted octahedral coordination geometry to bind two 4,4′-bipy ligands at the cis positions. Each 4,4′-bipy links two [Cu(NO3)2(2,2′-bipy)] units in 1 and two [Ni(tren)]2+ units in 2 to form 1D zigzag chains. In the structure of 1, these chains are linked by offset π−π interactions through 2,2′-bipy ligands, giving rise to a 2D network. The pyridine rings in the 4,4′-bipy ligand are coplanar in 1 but twisted in 2. The coordination polymer 1 shows a weak antiferromagnetic interaction between copper(II) ions with J = − 0.53 cm−1
TL;DR: In this article, a new 4,4′-bipyridyl-disulfenyl-based 1,2-bis(4-pyrinylmethyl)disulfensyl (bpms) was synthesized.
TL;DR: The controlled cleavage of coordination polymers consisting of well-defined large units can be employed for the rational synthesis of high nuclearity clusters by the conversion of a three-dimensional ZnII coordination polymer containing repeating hexameric units with a "twin-anchor" arrangement of the metal ions into the corresponding hexanuclear cluster by reaction with a donor solvent.
Abstract: The controlled cleavage of coordination polymers consisting of well-defined large units can be employed for the rational synthesis of high nuclearity clusters. This synthetic concept is demonstrated by the conversion (schematically shown) of a three-dimensional ZnII coordination polymer containing repeating hexameric units with a "twin-anchor" arrangement of the metal ions into the corresponding hexanuclear cluster by reaction with a donor solvent.