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Showing papers on "Coordination polymer published in 1998"


Journal ArticleDOI
TL;DR: Framework integrity is retained when water molecules replace the nitromethane molecules in the coordination polymer [Ag(hat)ClO4 ]⋅2 CH3 NO2 (see picture for structure).
Abstract: Framework integrity is retained when water molecules replace the nitromethane molecules in the coordination polymer [Ag(hat)ClO4 ]⋅2 CH3 NO2 (see picture for structure), which are arranged in a helical fashion within the chiral micropores of the three-dimensional [Ag(hat)+ ]n network with a (10,3)-a topology. Remarkably, this is also the case after subsequent displacement of the water by nitromethane molecules. hat=1,4,5,8,9,12-hexaazatriphenylene.

256 citations


Journal ArticleDOI
TL;DR: In this article, the structure of four organosilver(I) perchlorate with 9,10-diphenylanthracene (L1), rubrene (L2), benzo[a]pyrene (l3), and coronene (l4) was determined by X-ray diffraction.
Abstract: Four organosilver(I) complexes of polycyclic aromatic hydrocarbons (PAHs) have been investigated crystallographically. The aim was to establish whether a favorable combination of cation-π interactions and aromatic stackings might produce functional organometallic solid materials with novel networks. Complete structures of the silver(I) perchlorate with 9,10-diphenylanthracene (L1), rubrene (L2), benzo[a]pyrene (L3), and coronene (L4) were determined by X-ray diffraction. All compounds are organometallic species based on cation-π interactions. While complex 1 with L1 revealed a discrete mononuclear structure, complex 2 with rubrene displayed a π-bonded 3-D polymer. Complexes 3 and 4 can be regarded as both coordination polymer and stacking polymer, and the detailed differences in the geometries and the stacking patterns of L3 and L4 gave helical and triple-decker networks, respectively. The ESR spectroscopic results and conductivity of the compounds are also discussed. The present findings may serve as a b...

185 citations


Journal ArticleDOI
TL;DR: The overall topology of coordination polymers can be controlled by means of the coordination preferences of the metal center and the structure of the bridging ligand and is demonstrated by the synthesis of a single-stranded helical coordination polymer by the self-assembly of the exo-ditopic ligand 1 and silver ions.
Abstract: The overall topology of coordination polymers can be controlled by means of the coordination preferences of the metal center and the structure of the bridging ligand. This is demonstrated here by the synthesis of a single-stranded helical coordination polymer by the self-assembly of the exo-ditopic ligand 1 and silver ions.

184 citations


Journal ArticleDOI
TL;DR: The structure and dehydration behavior of the porous 3D coordination polymer {[La2(adipate)3(H2O)4]6H 2O}n are described in this article.
Abstract: The structure and dehydration behavior of the porous 3D coordination polymer {[La2(adipate)3(H2O)4]6H2O}n are described. Each La3+ is coordinated by nine oxygen atoms belonging to five carboxylate ...

178 citations


Journal ArticleDOI
TL;DR: Molecular recognition and electrostatic interaction of oppositely charged polyelectrolytes are combined in the fabrication of ultrathin metallosupramolecular multilayers.
Abstract: Molecular recognition and electrostatic interaction of oppositely charged polyelectrolytes are combined in the fabrication of ultrathin metallosupramolecular multilayers [shown schematically in the picture, PEI=polyethyleneimine, PSS=poly(styrene sulfonate)]. The layers between the PSS layers are composed of an iron(II) bis(terpyridine) coordination polymer.

174 citations


Journal ArticleDOI
TL;DR: In this article, the crystal structure of the coordination polymer [Co(bipy)1.5(NO3)2]·1 was revealed to exist as a two-dimensional bilayer motif, and the existence of this new structural supramolecular isomer was rationalized on the basis of a template effect from the CS2 guest molecule.
Abstract: The crystal structure of the coordination polymer [Co(bipy)1.5(NO3)2]·1 (bipy=4,4′-bipyridine), reveals that, if crystallized in the presence of CS2, it exists as a novel two-dimensional bilayer motif. This is in contrast to what might have been expected since a one-dimensional molecular-ladder motif is exhibited by 1 when crystallized in the presence of MeCN or CHCl3. A molecule of CS2 is clathrated inside the bilayer via what appear to be C–H···S hydrogen bonds from 4,4′-bipyridine ligands. Adjacent bilayers pack efficiently in a gear-like fashion. The existence of this new structural supramolecular isomer is rationalized on the basis of a template effect from the CS2 guest molecule.

167 citations


Journal ArticleDOI
TL;DR: The chiral and porous cubic coordination polymer Ni3- (btc)2(py)6(eg)6·xeg·yH2O (bbtc = 1,3,5-benzenetricarboxylate, py = pyridine, eg = ethylene glycol, x ≈ 3, y ≈ 4) is based on the interpenetration of four independent (10,3)-a networks, and contains large interconnected cavities with diameter 16 A which may be desolvated without irreversibly destroying the

159 citations


Journal ArticleDOI
TL;DR: The coordination polymer Cu[1,2-bis(4-pyridyl)ethane]2-(NO3)2}n does not exist as a square grid network, rather it is the first example of a twofold NbO type 3D network.

144 citations


Journal ArticleDOI
TL;DR: A new branch of crystal engineering appears to have borne fruit: A noncovalently bonded network consisting of the complex illustrated as a stick model on the right is converted directly into a coordination polymer with a similar molecular architecture.
Abstract: A new branch of crystal engineering appears to have borne fruit: A noncovalently bonded network consisting of the complex illustrated as a stick model on the right is converted directly into a coordination polymer with a similar molecular architecture. The implications of the new work extend beyond the boundaries of coordination chemistry since the same strategy should work equally well in organic and organometallic systems.

122 citations


Journal ArticleDOI
TL;DR: A two-dimensional coordination polymer of exceptional structural regularity was assembled from [MnIII (tpp)]⋅ClO4 and tpyp and yields an open bulk structure with networks of perpendicular channels filled with nitrobenzene solvent molecules.
Abstract: Channels make up 46% of the crystal volume: A two-dimensional coordination polymer of exceptional structural regularity (see schematic drawing; tpp=tetraphenylporphyrin, tpyp=tetrapyridylporphyrin) was assembled from [MnIII (tpp)]⋅ClO4 and tpyp. The crystal packing of these polymers yields an open bulk structure with networks of perpendicular channels filled with nitrobenzene solvent molecules. Only oligomeric entities are formed by the reaction of [ZnII (tpp)] with tpyp.

108 citations


Journal ArticleDOI
TL;DR: The readily prepared di-Schiff base of pyridine-2-aldehyde and ethane-1,2-diamine 1 reacts with silver(I) tetrafluoroborate to form by self-assembly the double-stranded D2-helicate (±)-[Ag212](BF4)2; the corresponding Schiff base of (1R,2R)-cyclohexane- 1,2diamines [(R,R)-2] reacts with Silver(I)-nitrate to produce the homochiral singlestranded C

Journal ArticleDOI
TL;DR: Using the O-alkylation of the lower rim of the calix[4]arene to impose the 1,3-alternate conformation and the functionalisation of the upper rim to set-up four nitrile groups pointing in a divergent fashion, an exo-ligand capable of forming linear coordination networks was obtained; upon self-assembly of the latter and silver cation, a linear coordination polymer was obtained and structurally analyzed in the solid state by an X-ray study as mentioned in this paper.

Journal ArticleDOI
TL;DR: The three-dimensional coordination polymer [Cd(tcm)(hmt)(H2O)](Tcm) (tcm- = tricyanomethanide, C(CN)3-; hmt = hexamethylenetetetramine) has a rutile-like topology with octahedral centers as discussed by the authors.
Abstract: The three-dimensional coordination polymer [Cd(tcm)(hmt)(H2O)](tcm) (tcm- = tricyanomethanide, C(CN)3-; hmt = hexamethylenetetramine) has a rutilelike topology, with octahedral centers (cadmium ato...

Journal ArticleDOI
TL;DR: In this article, four new polymeric lanthanide(III) complexes of nicotinic acid N-oxide and isonic-acid Noxide have been synthesized and structurally determined.

Journal ArticleDOI
TL;DR: In this paper, the reaction of iron(III) perchlorate with 4-pyridine carbaldehyde under hydro(solvo)thermal conditions affords bis(isonicotinato)iron(II) 1, in which both pyridine and carboxylate groups coordinate to iron centers.
Abstract: The reaction of iron(III) perchlorate with 4-pyridinecarbaldehyde under hydro(solvo)thermal conditions affords bis(isonicotinato)iron(II) 1, in which both pyridine and carboxylate groups coordinate to iron centers resulting in an unprecedented neutral, three-dimensional polymeric network with a carboxylate-bridged Fe–Fe infinite chain.

Journal ArticleDOI
TL;DR: In this article, the title compound (1) was found in the triclinic system, space group P1, with a = 11.234(2) A, b = 12.719(4) A and c = 16.142(4), α = 95.63°, β = 103.73°, and Z = 2.83°.
Abstract: The reaction of (NH4)2Ce(NO3)6 and CaCl2 with dipicH2 resulted in the title compound (1). 1 crystallizes in the triclinic system, space group P1, with a = 11.234(2) A, b = 12.719(4) A, c = 16.142(4) A, α = 95.63(2)°, β = 103.73(2)°, γ = 113.83(2)°, and Z = 2. The structure consists of Ce(dipic)32- and Ca(dipicH2)(OH2)32+ ions linked by carboxylate groups forming an infinite linear chain having alternating tricapped trigonal prismatic and square antiprismatic polyhedra.

Journal ArticleDOI
TL;DR: In this paper, the reaction of Ag[C3(CN)5] and [MnIIITPP]Cl (TPP = meso-tetraphenylporphinato) leads to [C3[CN]5]-, which has been crystallographically, spectroscopically, and magnetically characterized.
Abstract: Reaction of Ag[C3(CN)5] and [MnIIITPP]Cl (TPP = meso-tetraphenylporphinato) leads to [MnIIITPP]+[C3(CN)5]-, which has been crystallographically, spectroscopically, and magnetically characterized.This complex forms a 1-D ···D+A-D+A-··· coordination polymer with [C3(CN)5]- (A) having an unusual μ asymmetric bridge bonding and the cation (D) being unusually puckered. The zero-field-splitting parameter is −4.0 K (−2.8 cm-1) for MnIII is this six-coordinate environment.

Journal ArticleDOI
TL;DR: In this article, a layered coordination polymer (4-cyanopyridine)cadmium(II) iodide is assisted by n-ς* donor-acceptor interactions between coordinated iodine atoms of the layers and iodine molecules which bridge adjacent layers.

Journal ArticleDOI
TL;DR: In this article, X-ray crystal structures of the coordination polymers [MII(NO3)2(1,2-bis(4-pyridyl)ethane)1.5]n (MII = Co, Ni) (1a-d) reveal that they can exist as flexible bilayer architectures.

Journal ArticleDOI
TL;DR: Depending on the stoichiometry, diindacycle 1 and pyrazine in THF reversibly form a stair- or a ladderlike self-organized coordination polymer that in both cases is assembled at angles close to 90°.
Abstract: Depending on the stoichiometry, diindacycle 1 and pyrazine in THF reversibly form a stair- or a ladderlike self-organized coordination polymer. In both cases, the building blocks are assembled at angles close to 90°.

Journal ArticleDOI
TL;DR: In this article, a novel polymeric Gd2Cu3 complex of iminodiacetic acid (H2L1=NH{CH2COOH}2) was synthesized and structurally characterized.
Abstract: A novel polymeric Gd2Cu3 complex of iminodiacetic acid (H2L1=NH{CH2COOH}2), namely, Gd2Cu3(L1)6, 1, has been synthesized and structurally characterized. In the title complex, the Gd3+ ion is nine-coordinated by six O atoms from three bidentate chelating carboxylate groups and three O atoms from three anti-anti bridging carboxylic groups of six L1 ligands; the Cu2+ ion is six-coordinated by four O and two N atoms from two chelating L1 ligands. Each pair of Gd(III) atoms is bridged by three L1 ligands, each of which also chelates with one copper(II) ion, thus forming a Gd2Cu3 cluster unit. Such cluster units are cross-linked by flexible L1 ligands into a three-dimensional coordination framework. The title complex crystallizes in the trigonal space group P-3c1 (No. 165) with a = b = 13.433(4), c = 14.770(6) A; V = 2308(1) A3; Dcalca = 1.859 g cm−3; Z = 2.

Journal ArticleDOI
TL;DR: A hydrated coordination polymer is formed by heating the tecton 2,5-pyridinedicarboxylic acid with cobalt(II), nickel(II) or cobalt-II and nickel-II acetate in water.
Abstract: A hydrated coordination polymer is formed by heating the tecton 2,5-pyridinedicarboxylic acid with cobalt(II), nickel(II) or cobalt(II) and nickel(II) acetate in water

Journal ArticleDOI
TL;DR: A [Cp3 Ba]∞ coordination polymer with a chain structure is present in the compound [Cc3 Ba]- [Bu4 P]+ and the barium center is tetrahedrally coordinated by four η5 -Cp rings.
Abstract: A [Cp3 Ba]∞ coordination polymer with a chain structure is present in the compound [Cp3 Ba]- [Bu4 P]+ . The barium center is tetrahedrally coordinated by four η5 -Cp rings (a section of the chain is shown on the right). The Bu4 P cations bridge neighboring [Cp3 Ba]∞ chains through short hydrogen bonds, and the cocrystallized THF molecules do not coordinate to the barium centers but are instead involved in short CH⋅⋅⋅O hydrogen bonds with the Bu4 P cations.

Journal ArticleDOI
TL;DR: In this paper, the synthesis and characterization of five compounds obtained by the reaction of dirhodium (II)tetraacetate with 1,4-dicyanobenzene in different solvent systems are described.

Journal ArticleDOI
TL;DR: Barium terephthalate, [Ba{1,4-C6H4(COO)2}]n, formed a three-dimensional coordination network polymer with 7:7 connectivity between the Ba cations and tereyphthalate dianions Each Ba is eight coordinate and uses all eight oxygen lone pairs of the ligand as mentioned in this paper.
Abstract: Barium terephthalate, [Ba{1,4-C6H4(COO)2}]n, forms a three-dimensional coordination network polymer with 7:7 connectivity between the Ba cations and terephthalate dianions Each Ba is eight-coordinate and uses all eight oxygen lone pairs of the ligand

Journal ArticleDOI
TL;DR: The pseudo three-dimensional coordination polymer [Zn(4,4′-bipy)(H 2 O)(SO 4 )]·0.5 SZn was synthesized by the ethanothermal reaction of 4,4''bipyridine with ZnSO 4 ·7 H 2 O in a sealed tube at 120°C as discussed by the authors.

Journal ArticleDOI
TL;DR: In this paper, an isotactic coordination polymer chain is assembled by Mn(II) and o-phthalate dianion, an amphiphilic channel which has hydrophilic inside and hydrophobic outside is formed via hydrogen bonds, has been isolated and structurally characterized.
Abstract: The complex [Mn(μ-phth)(phen)(H2O)2]·H2O (phth = o-phthalato; phen = 1,10-phenanthroline), in which an unusual isotactic coordination polymer chain is assembled by Mn(II) and o-phthalate dianion, an amphiphilic channel which has hydrophilic inside and hydrophobic outside is formed via hydrogen bonds, has been isolated and structurally characterized.

Journal ArticleDOI
TL;DR: Coordination oligomers and polymers composed of [(CN)(5)Fe(II)-CN-Pt(IV)(NH(3))(4)] units have been synthesized and Cyclic voltammetry is found to be a sensitive probe of oligomer and polymer structure.
Abstract: Coordination oligomers and polymers composed of [(CN)(5)Fe(II)-CN-Pt(IV)(NH(3))(4)] units have been synthesized. The oligomer growth mechanism is based on the oxidation state of the iron centers which can be specified either chemically or electrochemically to allow control over oligomer structure. Cyclic voltammetry is found to be a sensitive probe of oligomer and polymer structure. (13)C NMR is also shown to be a useful technique for characterizing the different geometric isomers. Thin films composed of [-(NC)(5)Fe(II)-CN-Pt(IV)(NH(3))(4)-](n)() were electropolymerized onto transparent indium tin oxide (ITO) electrode surfaces and characterized with regard to polymer morphology.

Journal ArticleDOI
TL;DR: The crystal and molecular structure of a dinuclear copper(II) complex with 3,4,9,10-perylenetetricarboxylic acid (H4ptca) and ethylenediamine (en) [Cu2(en)4(μ-ptca)](EtOH)2(H2O)6 has been determined by X-ray structural analysis as discussed by the authors.

Journal ArticleDOI
TL;DR: A new Er(III)-Na(I) coordination polymer of stoichiometry [NaEr2L5(H2O)6(NO3)]( NO3)·3.5H 2O (HL = picolinic acid N-oxide) has been synthesized and characterized by single-crystal X-ray analysis as discussed by the authors.
Abstract: A new Er(III)–Na(I) coordination polymer of stoichiometry [NaEr2L5(H2O)6(NO3)](NO3)·3.5H2O (HL = picolinic acid N-oxide) has been synthesized and characterized by single-crystal X-ray analysis. Crystals are triclinic, PĪ with a = 9.823(2), b = 12.453(2), c = 20.643(4) A; α = 98.49(3), (β = 101.40(3), γ = 108.69(3)°; V = 2284(1) A3; Z = 2. Of the two independent eight-coordinate erbium(III) ions in this complex, one is surrounded by four bidentate chelating L ligands, and the other by one bidentate chelating L ligand, four aqua ligands and two anti-carboxylate oxygen atoms from two neighboring [ErL4] units. The sodium(I) ion is in a distorted octahedral environment, being coordinated by a unidentate nitrate anion, three aqua ligands and two anti-carboxylate oxygen atoms from two adjacent [ErL4] units. The complex is built from zigzag chains of syn-anti carboxylate-bridged erbium(III) moieties directed in the a direction, which are cross-linked pairwise by aqua-bridgeddimericsodium(I) units. The resulting composite polymeric chains are further connected by hydrogen bonds to form a three-dimensional network.