Two new open framework cobalt phosphates: NaCo3(OH)(PO4)2.1/4H2O and Na(NH4)Co2(PO4)2.H2O

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co 6 (PO 4 ) 4 ·7H 2 O with a channel structure, Journal of Coordination Chemistry, 60:9, 995-1004, Using tri-ethyl phosphate as a phosphate source, the hydrothermal reaction of cobalt(II) oxalate di-hydrate, zinc oxide and 1,8 di-amino octane at 200 C gave purple crystals of Co 6 (PO 4 ) 4 Á 7H 2 O (1), along with a mixture of open-framework zinc-cobalt phosphates Co-Zn-HPO 4 , and Co 3 (HPO 4 ) 2 (2OH). Compound 1, has been characterized by thermal analysis, FTIR and single crystal X-ray diffraction. The single crystal structure of Co 6 (PO 4 ) 4 Á 7H 2 O reveals cobalt in four, five and six-fold coordination with linkages through the bridging water molecules and the oxygen atoms of the phosphate in the subunits. Four subunits are connected together through the oxygen atoms (PO 4 ), to form the three dimensional open framework structure, with a 20-member ring channel that hosts two uncoordinated water molecules. Thermal removal of the water molecules occurs between 400-600 C, with the collapse of the structure above 600 C.

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“…value of 1.93% [24]. For 1 the FTIR supports the presence of the OH stretching vibration at 3450 cm À1 from the coordinated water.…”

mentioning

confidence: 61%

“…The IR spectrum, figure 3, exhibits rather sharp bands at 3424 and 1631 cm À1 , which can be attributed to the strong O-H bonds of the bridging and free water molecules [24]. The peaks at 1103, 1021, 953(s) and 600-590 cm À1 (s) are attributed to the O-P-O and P-O vibrations.…”

Section: Spectral and Thermal Analysismentioning

confidence: 98%

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co₆(PO₄)₄·7H₂O with a channel structure

Oki

Zeller

Reynolds

et al. 2007

Journal of Coordination Chemistry

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“…The peak at 889 cm −1 is assigned to the bridging −OH in the Co−OH−Co bending vibration 27 as was shown in NaCo 3 (OH)(PO 4 ) 2 ·(1/4)H 2 O. 28 These large absorption bands together with the weak peak at 1632 cm −1 indicate the presence of OH groups in the Co 2 PO 4 OH (1) structure. , which is split into two lines, the second one at 14 390 cm .…”

Section: ■ Introductionmentioning

confidence: 83%

Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co₂PO₄OH Isostructural with Caminite

et al. 2014

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A new framework cobalt(II) hydroxyl phosphate, Co 2 PO 4 OH, was prepared by ionothermal synthesis using 1-butyl-4-methyl-pyridinium hexafluorophosphate as the ionic liquid. As the formation of Co 2 PO 4 F competes in the synthesis, the synthesis conditions have to be judiciously chosen to obtain well-crystallized, single phase Co 2 PO 4 OH. Single-crystal X-ray diffraction analyses reveal Co 2 PO 4 OH crystallizes with space group I4 1 /amd (a = b = 5.2713 (7)

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“…After the discovery of crystalline aluminum phosphate in 1982,4 as a synthetic alternative of the natural zeolites, a large number of other zeolite‐like inorganic polymer material metal phosphates, including transition metal phosphates, have been prepared and characterized. The most typical examples include the extensive families of open‐framework cobalt‐aluminum‐, vanadium‐, cobalt‐, zinc‐, and gallium‐phosphates,5–12 which are generally prepared under hydrothermal condition, and have their structural diversity.…”

Section: Introductionmentioning

confidence: 99%

Studies on two‐dimensional coordination polymer cadmium phosphate and its high efficient adsorption of Pb(II) ions from aqueous solutions

Yin

Zhao

et al. 2008

J of Applied Polymer Sci

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The two-dimensional coordination polymer cadmium phosphate with the morphology of rectangle layers was prepared by solid-state template reaction at room temperature, and was characterized by XRD, FTIR, and TEM techniques. The as-synthesized sample is a layered cadmium phosphate material, in which the structure is poly (CdPO 42 ) anion framework with ammonium ions and water species residing in the space between the layers, and cadmium ions are coordinated by the phosphate oxygen atoms. This article also presents the adsorption of Pb(II) ions from aqueous solution on the as-synthesized coordination polymer cadmium phosphate, and the results showed that this inorganic polymer adsorbent had good adsorption capacity. It could reach to the saturation adsorption capacity within an hour, and its excellent adsorption capacity for Pb(II) was 5.50 mmol/g when the initial solution concentration was 1.68 3 10 3 lg/mL at T 5 278K. Moreover, the adsorption kinetics and adsorption isotherms were studied, it revealed that the adsorption kinetics can be modeled by pseudo second-order rate equation wonderfully. The apparent activation energy (E a ), DG, DH, and DS were 3.16 kJ mol

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Two new open framework cobalt phosphates: NaCo3(OH)(PO4)2.1/4H2O and Na(NH4)Co2(PO4)2.H2O

Cited by 33 publications

References 24 publications

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co₆(PO₄)₄·7H₂O with a channel structure

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co₆(PO₄)₄·7H₂O with a channel structure

Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co₂PO₄OH Isostructural with Caminite

Studies on two‐dimensional coordination polymer cadmium phosphate and its high efficient adsorption of Pb(II) ions from aqueous solutions

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Two new open framework cobalt phosphates: NaCo3(OH)(PO4)2.1/4H2O and Na(NH4)Co2(PO4)2.H2O

Cited by 33 publications

References 24 publications

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co6(PO4)4·7H2O with a channel structure

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co6(PO4)4·7H2O with a channel structure

Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co2PO4OH Isostructural with Caminite

Studies on two‐dimensional coordination polymer cadmium phosphate and its high efficient adsorption of Pb(II) ions from aqueous solutions

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About

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co₆(PO₄)₄·7H₂O with a channel structure

Synthesis and crystal structure of a neutral open framework cobalt(II) phosphate Co₆(PO₄)₄·7H₂O with a channel structure

Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co₂PO₄OH Isostructural with Caminite