Phosphonosilicate gels by nohydrolytic condensation reactions

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Authors

STÝSKALÍK Aleš ŠKODA David MORAVEC Zdeněk BARNES Craig, Elliot PINKAS Jiří

Year of publication 2011
Type Conference abstract
MU Faculty or unit

Faculty of Science

Citation
Description Novel synthesis of phosphosilicates and hybrid inorganic-organic materials with the Si–O–P skeleton was executed by non-hydrolytic sol-gel method based on condensation reactions with ester elimination. Silicon tetraacetate and tris(trimethylsilyl)phosphate are used as precursors. Hybrid organic-inorganic materials are obtained by changing the molecular precursors to methyltriacetoxysilane, dimethyldiacetoxysilane, phenyltriacetoxysilane, diphenyldiacetoxysilane, bis(trimethylsilyl)cyclohexylphosphonate and bis(trimethylsilyl)phenylphosphonate. The products were characterized by IR spectroscopy, thermal analysis TG/DSC-FTIR, PXRD, ICP-OES, 29Si a 31P CP MAS NMR spectroscopy and N2 adsorption-desorption experiments. The volatile byproducts were analyzed by 1H, 29Si and 31P NMR spectroscopy and GC/MS.
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