Synthesis, Structure and Surface Photovoltage of a Series of Ni<sup>II</sup> Coordination Polymers

Sun, Lijuan; Niu, Shuyun; Jin, Jing; Gao, Yang; Ye, Ling

doi:10.1002/ejic.200600721

Cited by 66 publications

(46 citation statements)

References 25 publications

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“…The synthetic procedure involves DMF and H 2 Oassolvents, and we think the formate group comes from DMF. Similar situation also occurred in other systems [1][2][3], and it has long been known that DMF can be hydrolyzed to formate and DMA (dimethylamine) and that the rate of this process increases at high temperature and pressure [4]. …”

mentioning

confidence: 62%

Crystal structure of neodymium(III) formate, Nd(HCO2)3

Deng¹,

Zhang²,

Xiao³

et al. 2009

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialBiphenyl-3,3',4,4'-tetracarboxylic acid (0.033 g, 0.1 mmol), Nd(NO 3 ) 3 · 6H 2 O(0.0876 g, 0.2 mmol), NaOH (0.4 mmol, 0.016 g), DMF (N,N-dimethylformamide; 1m L), H 2 O( 6m L), and HNO 3 (0.5 mL, 0.75 MinH2O) were added respectively to a15 mL Teflon-lined steel autoclave, which was sealed and heated to 443K for 3d ays and then cooled to room temperature. Perfect pink block crystals were collected. Chemical analysis -found: C, 12.85 %; H, 1.12 %; calculated for C 3H3NdO6:C,12.90 %, H, 1.08 %. The synthesis of the title compound is out of the expectation of our original purpose. The ligand in the complex is af ormate, which was not directly introduced as one of the starting reaction materials. The starting materials biphenyl-3,3',4,4'-tetracarboxylic acid do not take part in the coordination. The synthetic procedure involves DMF and H 2 Oassolvents, and we think the formate group comes from DMF. Similar situation also occurred in other systems [1][2][3], and it has long been known that DMF can be hydrolyzed to formate and DMA (dimethylamine) and that the rate of this process increases at high temperature and pressure [4]. DiscussionThe title crystal structure, is isotypic with numerous lanthanide formates, like those of La, Ce, Tb and Tm [5]. Unit cell data have been reported previously for [Nd(HCO 2 ) 3 ] n [6], although the compound was described in that case as afractional hydrate and atomic coordinates were not determined. The title compound is a 3D neutral framework composed of Nd(III) ions and formate anions in a1:3ratio. The asymmetric unit contains 1/3 neodymium(III) cation and one formate HCO 2 − anion. The Nd ion lies on asite of 3m symmetry and is coordinated by nine Oatoms from nine HCO 2 − anions, which lie on mirror planes. The coordinating oxygen atoms of the formate ligand differ with respect to their linkage. O1 forms m 2-bridges between neighbouring neodymium centres, while O2 is monocoordinating. Each Catom makes three C−O−Nd linkages through one m 2-bridging Oatom (O1) and one m 1 -bound Oatom (O2). Three Nd ions and three HCO 2− anions are connected, forming six-membered rings, which are connected by further HCO 2− anions, generating a3Dframework. The distance between adjacent Nd ions is 4.0588(8) Å.

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confidence: 62%

Crystal structure of neodymium(III) formate, Nd(HCO2)3

Deng¹,

Zhang²,

Xiao³

et al. 2009

Zeitschrift Für Kristallographie - New Crystal Structures

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“…The formation of mono-dentate and/or multi-dentate M-O and M-N metal-ligand bonds [13] may also change the crystal properties. H 2 2,5-pydc complexes of first transition metal (II) ions having 1:1 ratio have been reported to be molecular, as in [Ni (2,5- 4 ] Á 2H 2 O [14], 1-D polymeric, as in Cu(2,5-pydc)(H 2 O) [15], 2D-polymeric, as in [Me (2,5- [16,17], Zn [18] and Ni [19]), and 3-D polymeric, as in [Fe (2,5- [20] A supramolecular structure has also been reported by Liang et al [21], by Wang et al [22] and by Mahata et al [23]: the compound with stoichiometry Zn(2,5pydc)(H 2 O) 2 contains the discrete entity Zn 4 (2,5pydc) 4 (H 2 O) 8 where the four penta-coordinated Zn atoms are connected by four 2,5-pydc ligands through bridges forming a rectangular structure. Stacking of the tetramers leads to the formation of channels.…”

Section: Introductionmentioning

confidence: 97%

Structure and thermal reactivity of Zn(II) salts of isocinchomeronic acid (2,5-pyridinedicarboxylic acid)

et al. 2008

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The synthesis, an improved refined crystal and molecular structure re-determination, and the thermal decomposition behavior of two Zn(II) derivatives of isocinchomeronic acid (2,5-pyridinedicarboxylic acid or H 2 2,5-pydc) are presented. [Zn(2,5-pydc)(H 2 O) 3 Zn(2,5-pydc)(H 2 O) 2 ] 2 (1) crystallizes in the triclinic P-1 space group with a = 7.106 (2) (2) is orthorhombic (P2 1 2 1 2 1 space group), with a = 7.342(1), b = 9.430(1), c = 13.834(2) Å , and Z = 4. The structures were refined to agreement R 1 -factors of 0.0315 (1) and 0.0336 (2). Complex (1) is arranged as molecular Zn 4 (2,5-pydc) 4 (H 2 O) 10 tetramers, the cages of which define channels that remain unblocked by anions. Compound (2) is polymeric with Zn(2,5-pydc)(H 2 O) 2 and Zn(2,5-pydc)(H 2 O) 3 units linked through bridging ligands. Both compounds were synthesized under mild conditions in aqueous media, without need to resort to hydrothermal media. Changing the pH from 4.51 to 5.75 suffices to direct the chemical processes toward the orthorhombic compound rather than to the triclinic one.

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“…Its complexes are also of great interest due to their potential applications in many areas, such as catalysis [4], antibacterial activity [5], enzyme inhibition [6], aqueous solution chemistry [7], surface chemistry [8], magnetism [9][10][11][12][13], luminescence [14][15][16], and fluorescence [17,18]. As a ligand H 2 pydc has four potential donor oxygen atoms and one nitrogen atom.…”

Section: Introductionmentioning

confidence: 99%

Pyridine-2,5-dicarboxylic acid complexes of nickel(II) with 2,2′-bipyridine and 1,10-phenanthroline coligands; syntheses, crystal structures, spectroscopic and thermal studies

Çolak

Akduman

Yeşılel

et al. 2009

Transition Met Chem

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Two pyridine-2,5-dicarboxylic acid (pydcH 2 ) complexes of nickel(II) with 2,2 0 -bipyridine and 1,10-phenanthroline were synthesized and characterized by elemental, spectroscopic, thermal analysis, magnetic measurements and single crystal X-ray diffraction techniques. Both [Ni(pydc)(bipy) 2 ]Á7H 2 O and [Ni(pydc)(phen) 2 ]Á6.5H 2 O crystallize in the monoclinic system and P2 1 /c space group. The Ni(II) ions are coordinated by two bidentate bipy or phen ligands and one pydc dianion in a distorted octahedral geometry. The pydc ligand is coordinated through the pyridine nitrogen atom and oxygen atom of carboxyl group as a bidentate ligand. Both carboxylate groups of pydc are deprotonated but only the 2-carboxylate is coordinated to the metal. Thermal decompositions of the complexes have been studied over the range 30-600°C on heating in a static air atmosphere.

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Synthesis, Structure and Surface Photovoltage of a Series of Ni^II Coordination Polymers

Cited by 66 publications

References 25 publications

Crystal structure of neodymium(III) formate, Nd(HCO2)3

Crystal structure of neodymium(III) formate, Nd(HCO2)3

Structure and thermal reactivity of Zn(II) salts of isocinchomeronic acid (2,5-pyridinedicarboxylic acid)

Pyridine-2,5-dicarboxylic acid complexes of nickel(II) with 2,2′-bipyridine and 1,10-phenanthroline coligands; syntheses, crystal structures, spectroscopic and thermal studies

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Synthesis, Structure and Surface Photovoltage of a Series of NiII Coordination Polymers

Cited by 66 publications

References 25 publications

Crystal structure of neodymium(III) formate, Nd(HCO2)3

Crystal structure of neodymium(III) formate, Nd(HCO2)3

Structure and thermal reactivity of Zn(II) salts of isocinchomeronic acid (2,5-pyridinedicarboxylic acid)

Pyridine-2,5-dicarboxylic acid complexes of nickel(II) with 2,2′-bipyridine and 1,10-phenanthroline coligands; syntheses, crystal structures, spectroscopic and thermal studies

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Synthesis, Structure and Surface Photovoltage of a Series of Ni^II Coordination Polymers