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Layered Metal(IV) Phosphonates with Rigid Pendant Groups: New Synthetic Approaches to Nanosized Zirconium Phosphate Phenylphosphonates
M. Pica,
A. Donnadio,
R. D’Amato,
D. Capitani,
M. Taddei,
M. Casciola,
Marco Taddei 
Inorganic Chemistry, Volume: 53, Issue: 4, Pages: 2222 - 2229
Swansea University Author:
Marco Taddei
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DOI (Published version): 10.1021/ic402884g
Abstract
Single phase mixed zirconium phosphate phenylphosphonates, ZrP(PP)x, were prepared by two different synthetic approaches: reaction of gels of nanosized α-zirconium phosphate in propanol with solutions of phenylphosphonic acid (H2PP), leading to the topotactic exchange of monohydrogen phosphate group...
| Published in: | Inorganic Chemistry |
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| ISSN: | 0020-1669 1520-510X |
| Published: |
American Chemical Society (ACS)
2014
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa32749 |
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| Abstract: |
Single phase mixed zirconium phosphate phenylphosphonates, ZrP(PP)x, were prepared by two different synthetic approaches: reaction of gels of nanosized α-zirconium phosphate in propanol with solutions of phenylphosphonic acid (H2PP), leading to the topotactic exchange of monohydrogen phosphate groups with phenylphosphonate groups, and precipitation from propanol solutions of H2PP, phosphoric acid, and zirconyl propionate. In both cases, propanol intercalated compounds were obtained. The x values of the ZrP(PP)x materials prepared by topotactic anion exchange ranged from 0.37 to 0.56 for (H2PP/Zr) molar ratios in the range 0.52–4.16 and [H2PP] = 0.1 M, while a maximum x value of 0.73 was only reached at 60 °C, with (H2PP/Zr) = 4.16 and [H2PP] = 0.31 M. Direct precipitation of ZrP(PP)x provided samples with 0.13 ≤ x ≤ 1.54, for H2PP molar fractions in the range 0.05–0.5 and (P/Zr) molar ratio = 6. At 90% relative humidity, the (H2O/Zr) molar ratio for the precipitated ZrP(PP)x powder samples increased in the range 1.3–3.0 with increasing x and resulted in being higher than that of nanosized ZrP (0.8). The analysis of the X-ray diffraction patterns of the gel and powder samples, together with the hydration data of the powder samples, suggested a structural model in which the random distribution of the phosphate and phenylphosphonate groups creates cavities which can accommodate propanol molecules in the gel samples and water molecules in the hydrated powder samples. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
4 |
| Start Page: |
2222 |
| End Page: |
2229 |