Construction of Hydrogen-Bonded and Coordination-Bonded Networks of Cobalt(II) with Pyromellitate:  Synthesis, Structures, and Magnetic Properties

Kumagai, Hiroo; Kepert, Cameron J.; Kurmoo, Mohamedally

doi:10.1021/ic020065y

Cited by 247 publications

(104 citation statements)

References 123 publications

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“…11,19,29,30 On the other hand, cobalt compounds have attracted extensive interest in recent years owing to their intriguing structures and biomedicinal propertires. 18,[31][32][33][34] On the basis of the aforementioned points, we have attempted to synthesize new cobalt supramolecular complexes with mixed ligands containing H 4 btec and 2,2'-bipy. In this paper, we report the synthesis, structure, and thermal properties of two 3D cobalt(II) compounds [Co(2,2'-bipy)(…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis, Crystal Structures and Thermal Properties of Two Three-Dimensional Cobalt(II) Complexes

Tao¹,

Li²,

Cheng³

et al. 2012

Bulletin of the Korean Chemical Society

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Two cobalt(II) compounds [Co(2,2'-bipy)(H 2 O) 2 (SO 4 )] n (1) and [Co 2 (2,2'-bipy) 2 (btec)(H 2 O) 6 ]·2H 2 O (2) (2,2'-bipy = 2,2'-bipyridine, H 4 btec = 1,2,4,5-benzenetetracarboxylic acid), have been simultaneously synthesized by a one-pot slow solvent evaporation reaction. Their structures were determined by single-crystal X-ray diffraction and further characterized by X-ray powder diffraction (XRPD), IR, elemental and thermogravimetric analysis (TGA). The structural analysis reveals that compound 1 exhibits an infinite 1D chain structure with the octahedral Co(II) centers bridging by the tetrahedral µ 2 -SO 4 2− ligands, while compound 2 possesses a dinuclear Co 2 (2,2'-bipy) 2 (btec)(H 2 O) 6 unit and the two adjacent octahedral Co(II) ions are linked by the bismonodentately coordinated btec ligand. Additionally, compound 2 exhibits blue fluorescent emission in the solid state at room temperature.

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Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis, Crystal Structures and Thermal Properties of Two Three-Dimensional Cobalt(II) Complexes

Tao¹,

Li²,

Cheng³

et al. 2012

Bulletin of the Korean Chemical Society

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“…These binding modes complicate selective synthesis of metal carboxylate complexes [1][2][3][4][5][6][7][8][9][10][11][12]. A general approach to rationalize selective synthetic procedures for polynuclear carboxylate complexes would require extensive structural study on carboxylate complexes prepared via different synthetic routes [13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Manganese and Cadmium Benzoate Complexes Having 8-Aminoquinoline Ancillary Ligand

Baruah¹,

Karmakar²,

Baruah³

2008

TOICJ

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Simple synthetic methods for synthesis of trinuclear manganese(II) benzoate complexes having 8-aminoquinoline as ancillary ligand are reported. The crystal structure of two trinuclear manganese(II) complexes, [Mn 3 (2-NO 2 C 6 H 4 COO) 6 (AQ) 2 ] (I) and [Mn 3 (3-CH 3 C 6 H 4 COO) 6 (AQ) 2 ].NPD (II) is reported (where AQ = 8-aminoquinoline, NPD = 1,5 dihydroxynaphthalene). In solution, the degradation of trinuclear complex I leads to a dinuclear complex [Mn 2 (2-NO 2 C 6 H 4 COO) 4 (AQ) 2 (H 2 O) 2 ] (III) and structure of complex III is reported. A solution phase synthetic method for the synthesis of the dinuclear manganese(II) complex III is also reported. This complex has a Mn 2 O 2 bridge originating from the carboxylate ligand. Synthesis of a cadmium 2-nitrobenzoate co-ordination polymer [Cd(2-NO 2 C 6 H 4 COO) 2 (AQ)] n (IV) having eight co-ordination number is reported and its structure is explained as aggregation of multiple numbers of six coordinated mononuclear cadmium complexes. Keywords:Metal carboxylates, 8-aminoquinoline, manganese trinuclear complexes, cadmium co-ordination polymer. INTRODUCT IONCarboxylate ligands can bind to metal ions in several ways, such as monodentate, bidentate, bridging etc. These binding modes complicate selective synthesis of metal carboxylate complexes [1][2][3][4][5][6][7][8][9][10][11][12]. A general approach to rationalize selective synthetic procedures for polynuclear carboxylate complexes would require extensive structural study on carboxylate complexes prepared via different synthetic routes [13][14][15][16][17][18][19][20][21][22][23][24][25]. Retro-analysis of structures of polynuclear metal complexes provides information on the smallest mononuclear building blocks to form assemblies [26]. Such approach is applied to carboxylate complexes that are prepared through hydrothermal method. Comparison of structure of complexes prepared through solution route or some other related methods is essential to understand nucleation process. It is necessary to choose ligand that has versatility to form different types of metal complexes [27][28][29][30][31][32][33]. There is vast literature on mononuclear and polynuclear metal carboxylate complexes [13][14][15][16][17][18][19][20][21][22][23][24][25]34], thus the metal carboxylate complexes would be suitable for such study. The rationalization of the structural aspect through co-ordination capability of the metal ions can be another approach to standardize synthetic procedures. In this study the synthesis and structures of the trinuclear manganese complexes, and co-ordination polymer of cadmium having 8-aminoquinoline (AQ) are reported. MATERIALS AND METHODS Synthesis and Spectroscopic Properties of Complexes [Mn 3 (2-NO 2 C 6 H 4 COO) 6 (AQ) 2 ] (I)Manganese acetate tetrahydrate (0.245 g, 1 mmol) and 2-nitrobenzoic acid (0.334 g, 2 mmol) were mixed in a mor-*Address correspondence to this author at the Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039 Assam, India; E-mail: juba@iit...

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“…Co(H 2 O) 6 (C 10 H 4 O 8 ) was synthesized by hydrothermal synthesis using a Teflon lined stainless steel cell working under autogenous pressure. [6] Cobalt chloride hexahydrate, CoCl 2 .6H 2 O (1.2 g) was added to a neutralised solution of pyromellitic acid, C 10 H 6 O 8 (0.63 g) and potassium hydroxide, KOH (0.28 g) in 10 ml water and the solution was placed in the cell and kept at 120°C for 12 hours.…”

Section: Methodsmentioning

confidence: 99%

“…[6] Cobalt chloride hexahydrate, CoCl 2 .6H 2 O (1.2 g) was added to a neutralised solution of pyromellitic acid, C 10 H 6 O 8 (0.63 g) and potassium hydroxide, KOH (0.28 g) in 10 ml water and the solution was placed in the cell and kept at 120°C for 12 hours. Some large single crystals were obtained in the presence of two other phases and these are separated under a microscope by their colors and sizes.…”

Section: Methodsmentioning

confidence: 99%

“…[1,5] The successful growth of large single crystals of Co(H 2 O) 6 (C 10 H 4 O 8 ), [6] consisting of non-interacting cobalt ions with an almost octahedral geometry, provided the opportunity to explore the anisotropy of the magnetic properties as well as studying the uniaxial pressure effects up to 12 kbar in an attempt to elucidate the geometry related parameters that govern the magnetic properties of Co(II). Here, we present some preliminary experimental results.…”

Section: Introductionmentioning

confidence: 99%

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Uniaxial pressure effect on the magnetic properties of the metal-organic hybrid compound Co^II(H₂O)₆pyromellitate

Matsumoto

Kishizono

Fujimoto

et al. 2010

J. Phys.: Conf. Ser.

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Construction of Hydrogen-Bonded and Coordination-Bonded Networks of Cobalt(II) with Pyromellitate: Synthesis, Structures, and Magnetic Properties

Cited by 247 publications

References 123 publications

One-Pot Synthesis, Crystal Structures and Thermal Properties of Two Three-Dimensional Cobalt(II) Complexes

One-Pot Synthesis, Crystal Structures and Thermal Properties of Two Three-Dimensional Cobalt(II) Complexes

Manganese and Cadmium Benzoate Complexes Having 8-Aminoquinoline Ancillary Ligand

Uniaxial pressure effect on the magnetic properties of the metal-organic hybrid compound Co^II(H₂O)₆pyromellitate

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Construction of Hydrogen-Bonded and Coordination-Bonded Networks of Cobalt(II) with Pyromellitate: Synthesis, Structures, and Magnetic Properties

Cited by 247 publications

References 123 publications

One-Pot Synthesis, Crystal Structures and Thermal Properties of Two Three-Dimensional Cobalt(II) Complexes

One-Pot Synthesis, Crystal Structures and Thermal Properties of Two Three-Dimensional Cobalt(II) Complexes

Manganese and Cadmium Benzoate Complexes Having 8-Aminoquinoline Ancillary Ligand

Uniaxial pressure effect on the magnetic properties of the metal-organic hybrid compound CoII(H2O)6pyromellitate

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Uniaxial pressure effect on the magnetic properties of the metal-organic hybrid compound Co^II(H₂O)₆pyromellitate