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A Layered Mixed Zirconium Phosphate/Phosphonate with Exposed Carboxylic and Phosphonic Groups: X-ray Powder Structure and Proton Conductivity Properties
A. Donnadio,
M. Nocchetti,
F. Costantino,
M. Taddei,
M. Casciola,
F. da Silva Lisboa,
R. Vivani,
Marco Taddei 
Inorganic Chemistry, Volume: 53, Issue: 24, Pages: 13220 - 13226
Swansea University Author:
Marco Taddei
Full text not available from this repository: check for access using links below.
DOI (Published version): 10.1021/ic502473w
Abstract
A novel mixed zirconium phosphate/phosphonate based on glyphosine, of formula Zr2(PO4)H5(L)2·H2O [L = (O3PCH2)2NCH2COO], was synthesized in mild conditions. The compound has a layered structure that was solved ab initio from laboratory PXRD data. It crystallizes in the monoclinic C2/c space group wi...
| 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: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa32750 |
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| Abstract: |
A novel mixed zirconium phosphate/phosphonate based on glyphosine, of formula Zr2(PO4)H5(L)2·H2O [L = (O3PCH2)2NCH2COO], was synthesized in mild conditions. The compound has a layered structure that was solved ab initio from laboratory PXRD data. It crystallizes in the monoclinic C2/c space group with the following cell parameters: a = 29.925(3), b = 8.4225(5), c = 9.0985(4) Å, and β = 98.474(6)°. Phosphate groups are placed inside the sheets and connect the zirconium atoms in a tetradentate fashion, while uncoordinated carboxylate and P–OH phosphonate groups are exposed on the layer surface. Due to the presence of these acidic groups, the compound showed remarkable proton conductivity properties, which were studied in a wide range of temperature and relative humidity (RH). The conductivity is strongly dependent on RH and reaches 1 × 10–3 S cm–1 at 140 °C and 95% RH. At this RH, the activation energy of conduction is 0.15 eV in the temperature range 80–140 °C. The similarities of this structure with related structures already reported in the literature were also discussed. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
24 |
| Start Page: |
13220 |
| End Page: |
13226 |