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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Krztoń-Maziopa, Anna
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2020Electrocrystallization of nanostructured iron-selenide films for potential application in dye sensitized solar cellscitations
- 2020Bismuth and oxygen valencies and superconducting state properties in Ba<inf>1-x</inf>K<inf>x</inf>BiO<inf>3</inf> superconductorcitations
- 2018Thermally induced structural transformations of linear coordination polymers based on aluminum tris(diorganophosphates)citations
- 2018Magnetic imaging of antiferromagnetic and superconducting phases in RbxFe2-ySe2 crystalscitations
- 2016Structural disorder in Lix(C5H5N)yFe2-zSe2 and CsxFe2-zSe2 superconductors studied by Mössbauer spectroscopycitations
- 2016Superconductivity in alkali metal intercalated iron selenidescitations
- 2014Compressibility and pressure-induced disorder in superconducting phase-separated Cs0.72Fe1.57Se2citations
- 2013Photoemission and muon spin relaxation spectroscopy of the iron-based Rb0.77Fe1.61Se2 superconductor: Crucial role of the cigar-shaped Fermi surfacecitations
- 2012Intrinsic crystal phase separation in the antiferromagnetic superconductor RbyFe2-xSe2: a diffraction studycitations
- 2012Single crystal growth of novel alkali metal intercalated iron chalcogenide superconductorscitations
- 2012ER suspensions of composite core-shell microspheres with improved sedimentation stabilitycitations
- 2011Room temperature antiferromagnetic order in superconducting XyFe2−xSe2 (X = Rb, K): a neutron powder diffraction studycitations
- 2011Synthesis and crystal growth of Cs 0.8 (FeSe 0.98 ) 2 : a new iron-based superconductor with T c = 27 Kcitations
- 2011Iron-vacancy superstructure and possible room temperature antiferromagnetic order in superconducting CsyFe2-xSe2citations
- 2011The synthesis, and crystal and magnetic structure of the iron selenide BaFe2Se3 with possible superconductivity at Tc = 11 Kcitations
- 2009Ionically conductive polymers for ER fluid preparation
- 2009Electrorheological fluids containing phosphorylated polystyrene-co-divinylbenzenecitations
- 2006Electrorheological effect in hybrid fluids with liquid crystalline additivescitations
- 2005Electrorheological fluids based on polymer electrolytescitations
- 2005Electrorheological fluids based on modified polyacrylonitrilecitations
- 2005Study of electrorheological properties of poly (p -phenylene) dispersionscitations
Places of action
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article
Thermally induced structural transformations of linear coordination polymers based on aluminum tris(diorganophosphates)
Abstract
The thermal transitions of inorganic–organic hybrid polymers composed of linear aluminum tris(diorganophosphate) chains with a general formula of catena-Al[O2P(OR)2]3 (where R = C1–C8 alkyl group or phenyl moiety) have been studied by means of DSC, powder XRD, TGA and TG-QMS, as well as optical spectroscopy. DSC and XRD reveal that most of them undergo reversible structural transformations in the solid state between −100 and 200 °C caused by the changes in conformation of their organic substituents; however, a translational displacement of the rigid polymeric chains occurs only in the case of the derivative bearing long 2-ethylhexyl groups, which becomes liquid at about 140 °C. The thermal decomposition of the studied polymers begins between 200 and 265 °C depending on the type of organic substituent R decorating their aluminophospate core. TGA combined with mass spectrometry of the evolved gaseous products shows that the pyrolytic decomposition of Al[O2P(OR)2]3 proceeds either through β-elimination of olefin (for compounds with C2–C8 aliphatic ligands), or a homolytic cleavage of the P–OR bond (for methyl and phenyl derivatives); both processes are accompanied by condensation of the newly formed POH groups and liberation of water. Powder XRD, FTIR and SEM analyses of the solid residues indicate that thermolysis of Al[O2P(OR)2]3 accompanied by olefin elimination leads to the formation of condensed aluminumphosphates, mainly aluminum cyclohexaphosphate, exhibiting porous morphology. On the other hand, thermal degradation of methyl or phenyl derivatives results in amorphous aluminophosphate residues, and the latter contains conducting carbonaceous phases.