Crystal and molecular structures of potassium cobalt hydrogen phthalate K2[Co(H2O)6](C8H5O4)4 ⋅ 4H2O and mechanism of Co2+ impurity trapping in KAP crystals

Furmanova, N. G.; Eremina, T. A.; Okhrimenko, T. M.; Кузнецов, В. А.

doi:10.1134/1.1312917

Cited by 5 publications

(9 citation statements)

References 7 publications

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“…Similarly Ni:KAP shows broad absorbance maximum between 500-750nm. The absorbance in the visible region in both cobalt and nickel doped KAP is Hence this observation confirms the presence of six water molecules around cobalt in conjunction with XRD analysis as reported by [12] . 11 .…”

Section: Uv-visible Spectral Analysissupporting

confidence: 88%

“…Results of single crystal X-ray diffraction is given in table 1. The lattice parameters of the pure and doped KAP crystals were found to be in good agreement with reported values [5,11,12] . The schematic morphology diagrams for the pure and doped KAP crystals are shown in fig 2a, 2b and 2c.…”

Section: Single Crystal Xrd Studysupporting

confidence: 86%

“…Since the O-H stretching vibrations in the higher energy region are clearly distinct, the COOH group is to be bonded to cobalt without deprotonation. It is also evident from the molecular packing diagram of the unit cell 12 .…”

Section: Fourier Transform Infrared Analysismentioning

confidence: 83%

“…The effect of trivalent metal ions like Fe 3+ and Cr 3+ ions on the structure, optical and electro-optical properties of KAP crystals were studied and reported 10 . The structure of cobalt and nickel doped KAP was reported earlier 11,12 . In this present work, influence of divalent metal ions such as cobalt (Co 2+ ) and nickel (Ni 2+ ) on the morphology and optical properties of KAP crystals is carried out and reported.…”

Section: Introductionmentioning

confidence: 91%

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Effect of divalent metal ions on the structure, optical and mechanical properties of KAP single crystals

Uthayarani¹,

Sankar²,

Nair³

2007

Mat Sci Res India

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Single crystals of potassium acid phthalate (KAP), Nickel Doped KAP (NiKAP) and Cobalt doped KAP(Co KAP) have been grown from aqueous solutions by solvent evaporation method. The effect of these metal irons on surface morphology, structure, optical and mechanical properties have been studied. Single crystal XRD studies of these crystals confirm that both the added impurities have modified the structure of the KAP crystals in a similar manner. The presence of dopants in the crystal lattice have been further confirmed by FTIR analysis. The stoichiometric composition of both the doped crystals have been studied using EDAX analysis. Optical absorbance was carried out for all the crystals. The absorbance in the visible region observed in both the doped crystals was assigned to their d-d transitions. Micro hardness of the pure and doped crystals were found using Vickers's Hardness Technique.

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Section: Uv-visible Spectral Analysissupporting

confidence: 88%

Section: Single Crystal Xrd Studysupporting

confidence: 86%

Section: Fourier Transform Infrared Analysismentioning

confidence: 83%

Section: Introductionmentioning

confidence: 91%

See 2 more Smart Citations

Effect of divalent metal ions on the structure, optical and mechanical properties of KAP single crystals

Uthayarani¹,

Sankar²,

Nair³

2007

Mat Sci Res India

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“…Actually, the first such complex, K 2 [Ni(H 2 O) 6 ](Hpht) 4 Á4H 2 O, (II), was reported some years ago (Biagini Cingi et al, 1984), and was recently described again by Wu et al (2009), who appeared to be unaware of the previous publication. Meanwhile, the structures of two very similar complexes, K 2 [Co(H 2 O) 6 ](Hpht) 4 Á-4H 2 O, (III) (Furmanova et al, 2000), and K 2 [Co 0.76 Ni 0.24 -(H 2 O) 6 ](Hpht) 4 Á4H 2 O, (IV) (Muthu et al, 2012a), were described. Thus, (II), (III) and (IV), together with Rb 2 [Co-(H 2 O) 6 ](Hpht) 4 Á4H 2 O, (I), and the caesium analogue Cs 2 -[Co(H 2 O) 6 ](Hpht) 4 Á4H 2 O, (V), presented here, form a short series of five heterocation complexes with identical general formula and the same crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Dirubidium hexaaquacobalt(II) tetrakis(hydrogen phthalate) tetrahydrate and coordination modes of the hydrogen phthalate anion

Poleti

Rogan

2013

Acta Crystallogr C

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The title compound, Rb₂[Co(H₂O)₆](C₈H₅O₄)₄·4H₂O, consists of nearly regular octahedral [Co(H₂O)₆]²⁺ cations with the CoII cations on the inversion centre (special position 2a), Rb⁺ cations, hydrogen phthalate (Hpht⁻) anions and disordered water molecules. The Rb⁺ cation is surrounded by nine O atoms from Hpht⁻ anions and water molecules, with a strongly deformed pentagonal-bipyramidal geometry and one apex split into three positions. The crystal packing is governed by numerous hydrogen bonds involving all water molecules and Hpht⁻) anions. In this way, layers parallel to the ab plane are formed, with the aromatic rings of the Hpht⁻ anions esentially directed along the c axis. While Hpht⁻ anions form the outer part of the layers, disordered water molecules and Rb⁺ cations alternate with [Co(H₂O)₆]²⁺ cations in the inner parts. The only interactions between the layers are van der Waals forces between the atoms of the aromatic rings. A search of the Cambridge Structural Database for coordination modes and types of hydrogen-bonding interaction of the Hpht⁻ anion showed that, when uncoordinated Hpht⁻ anions are present, compounds with intermolecular hydrogen bonds are more numerous than compounds with intramolecular hydrogen bonds. For coordinated Hpht⁻ anions, chelating and bridging anions are almost equally common, while monodentate anions are relatively scarce. The same coordination modes appear for Hpht⁻ anions with or without intramolecular hydrogen bonds, although intramolecular hydrogen bonds are less common.

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Growth and characterization of hexaaquacobalt(II) dipotassium tetrahydrogen tetra-o-phthalate tetrahydrate crystals

Muthu

Bhagavannarayana

Mahadevan

et al. 2013

Materials Chemistry and Physics

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Crystal and molecular structures of potassium cobalt hydrogen phthalate K2[Co(H2O)6](C8H5O4)4 ⋅ 4H2O and mechanism of Co2+ impurity trapping in KAP crystals

Cited by 5 publications

References 7 publications

Effect of divalent metal ions on the structure, optical and mechanical properties of KAP single crystals

Effect of divalent metal ions on the structure, optical and mechanical properties of KAP single crystals

Dirubidium hexaaquacobalt(II) tetrakis(hydrogen phthalate) tetrahydrate and coordination modes of the hydrogen phthalate anion

Growth and characterization of hexaaquacobalt(II) dipotassium tetrahydrogen tetra-o-phthalate tetrahydrate crystals

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