[(enH2)0.5][Zr2(PO4)2(HPO4)F]·H2O: A Unique Zirconium Fluoride Phosphate with a Cavity Structure

Kemnitz, Erhard; Wloka, Martin; Trojanov, S.; Stiewe, A.

doi:10.1002/anie.199626771

Cited by 47 publications

(43 citation statements)

References 19 publications

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“…Two oxygen atoms [O(4) and O (7)] are estimated to bind to hydrogen to form OH ¹ groups. These OH ¹ groups form the hydrogen bonding network with NH 4 + ions in the interlayer. The mean interatomic distance of ZrO in ZrO 6 octahedra was 0.2054 nm, which is compared with that in ZrPO-1 (0.206 nm), 7) [enH 2 ] 0.5 - 2) The mean interatomic distance of PO for P(1)O 4 and P(2)O 4 tetrahedra was 0.1523 and 0.1533 nm, respectively, and these values were in good agreement with that in ZrPO-1 (0.1535 and 0.1529 nm), 7) 2)…”

Section: Methodsmentioning

confidence: 99%

“…5. The crystal structure is a three-dimensional framework build up by corner-sharing ZrO 6 octahedra and PO 4 tetrahedra and NH 4 + ion is located in the tunnel as shown in Fig. 6.…”

Section: (Nh 4 )Zr 2 (Po 4 ) 3 (Zrpo-7)mentioning

confidence: 99%

“…A variety of compounds based on a zirconium phosphate have been found as well as two types of famous zirconium phosphates, ¡-Zr(HPO 4 ) 2 6 (PO 4 ) 4 7) and [enH 2 ]Zr(OH)(PO 4 ) (HPO 4 ). 8) The last two compounds were found by our group and hereafter named as ZrPO-1 and ZrPO-4, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and crystal structure of two types of zirconium phosphates by hydrothermal reaction

Kumada¹,

Hinata²,

Dong³

et al. 2011

J. Ceram. Soc. Japan

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Single crystals of two types of zirconium phosphates, (NH 4 ) 2 [Zr 2 (OH) 2 (PO 4 ) 2 (HPO 4 )] and (NH 4 )Zr 2 (PO 4 ) 3 were prepared under hydrothermal condition using diethylene glycol as a solvent and their crystal structures were determined by using single crystal X-ray diffraction data. The former compound has the layer structure built up by corner-sharing ZrO 6 octahedra and PO 4 tetrahedra, and NH 4 + ions were located in the interlayer space. This compound crystallized in the monoclinic system, space group C2/c (#15) and the unit cell parameters were a = 1.7093(4), b = 0.8748(2), c = 0.9216(2) nm and ¢ = 103.69(2)°and the final R-factors were R = 0.066 and R w = 0.121 for all 5982 reflections. This compound decomposed by releasing NH 4 + ions in the interlayer above 300°C. The later compound has the cubic langbeinite-type structure in which NH 4 + ions were located in the tunnel and the structural refinement by using single crystal X-ray diffraction data was performed for the first time. This compound crystallized in the cubic system, space group P2 1 3 (#198) and the unit cell parameters were a = 1.0198(2) nm and the final R-factors were R = 0.072 and R w = 0.161 for all 1625 reflections. This compound also decomposed by releasing NH 4 + ions above 800°C.

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Section: Methodsmentioning

confidence: 99%

“…5. The crystal structure is a three-dimensional framework build up by corner-sharing ZrO 6 octahedra and PO 4 tetrahedra and NH 4 + ion is located in the tunnel as shown in Fig. 6.…”

Section: (Nh 4 )Zr 2 (Po 4 ) 3 (Zrpo-7)mentioning

confidence: 99%

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Preparation and crystal structure of two types of zirconium phosphates by hydrothermal reaction

Kumada¹,

Hinata²,

Dong³

et al. 2011

J. Ceram. Soc. Japan

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“…Since the use of fluoride ions as mineralizers was introduced by Guth et al [4] into hydrothermal preparation of zeolite, a good number of metal phosphate fluorides have been obtained. Recently, the fluoride route has led to the first zirconium phosphate (ZrPO-1) with three-dimensional open-framework structure [5]. More recently, Férey and co-workers [6] reported the synthesis and ab initio structure determination of a new three-dimensional mixed-valence oxyfluorinated titanium phosphate MIL-15, and two organically templated mixed-valent Ti III /Ti IV phosphates with open-framework structures were also synthesized [7,8].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis and characterization of microporous crystals of trivalent metal-containing zirconium phosphates

Sun

Liu

et al. 2004

Catalysis Today

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“…[9][10][11] As with aluminophosphates, the extensive application of hydrothermal synthesis methods and the use of amine templating agents, often in non-aqueous solvents, has led to the recent preparation of several new phases with different structures: one-dimensional chains, [12][13][14] new layered compounds, 13,[15][16][17][18][19] and even open-framework 3-D solids. 17,18,20 In these new compounds, the introduction of fluorine atoms and/or other monodentate terminal groups into the zirconium coordination sphere enlarged the number of accessible structures. Unlike hydrothermal synthesis, in which high temperatures and pressures are used, the method of precipitation of zirconium phosphates by thermal decomposition of zirconium fluorocomplexes (HF method), traditionally used for the preparation of a-and c-ZrP, and their organic derivatives, is carried out using mild conditions and low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Dimensional reduction in zirconium phosphate; from layers to ribbons to chains

2003

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(2), have been synthesized via decomposition of zirconium fluoride complexes. Their structures were determined by single crystal and X-ray powder diffraction, respectively. The structure of 1 is made of infinite single chains composed of insular Zr octahedra vertex-linked to four PO 4 tetrahedra. Each zirconium is trans-coordinated to two F atoms. The structure of 2 is composed of double chains that can be seen as two condensed single chains of 1, with the elimination of a fluorine atom from the zirconium coordination sphere. Zirconium is octahedrally coordinated, with three triply connected and two doubly connected phosphate tetrahedra, and with a fluorine atom. The structural connection between 1, 2, and layered a-and c-zirconium phosphates is discussed and verified by interconversion experiments. 1 was found to convert into 2 after ageing in its mother liquor, while 2 can be converted into a-ZrP in acidic media. 1 and 2 were found to swell and form stable colloidal dispersions on elution with 0.1 M hydrochloric acid solution. These properties make these one-dimensional zirconium phosphates interesting compounds for application in nanocomposite materials synthesis.

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[(enH₂)_0.5][Zr₂(PO₄)₂(HPO₄)F]·H₂O: A Unique Zirconium Fluoride Phosphate with a Cavity Structure

Cited by 47 publications

References 19 publications

Preparation and crystal structure of two types of zirconium phosphates by hydrothermal reaction

Preparation and crystal structure of two types of zirconium phosphates by hydrothermal reaction

Hydrothermal synthesis and characterization of microporous crystals of trivalent metal-containing zirconium phosphates

Dimensional reduction in zirconium phosphate; from layers to ribbons to chains

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