STÝSKALÍK, Aleš, David ŠKODA, Zdeněk MORAVEC, Michal BABIAK, Craig E. BARNES a Jiří PINKAS. Control of micro/mesoporosity in non-hydrolytic hybrid silicophosphate xerogels. Journal of Materials Chemistry A. Royal Society of Chemistry, 2015, roč. 3, č. 14, s. 7477-7487. ISSN 2050-7488. Dostupné z: https://dx.doi.org/10.1039/c4ta06823h. |
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@article{1306716, author = {Stýskalík, Aleš and Škoda, David and Moravec, Zdeněk and Babiak, Michal and Barnes, Craig E. and Pinkas, Jiří}, article_number = {14}, doi = {http://dx.doi.org/10.1039/c4ta06823h}, keywords = {ORGANIC-INORGANIC MATERIALS; SOL-GEL POLYMERIZATION; ACID-BASE REACTION; BRIDGED POLYSILSESQUIOXANES; PHOSPHOSILICATE GLASSES; VIBRATIONAL-SPECTRA; FUEL-CELLS; SILSESQUIOXANE; PRECURSORS; CHEMISTRY}, language = {eng}, issn = {2050-7488}, journal = {Journal of Materials Chemistry A}, title = {Control of micro/mesoporosity in non-hydrolytic hybrid silicophosphate xerogels}, url = {http://pubs.rsc.org/en/Content/ArticleLanding/2015/TA/C4TA06823H#!divAbstract}, volume = {3}, year = {2015} }
TY - JOUR ID - 1306716 AU - Stýskalík, Aleš - Škoda, David - Moravec, Zdeněk - Babiak, Michal - Barnes, Craig E. - Pinkas, Jiří PY - 2015 TI - Control of micro/mesoporosity in non-hydrolytic hybrid silicophosphate xerogels JF - Journal of Materials Chemistry A VL - 3 IS - 14 SP - 7477-7487 EP - 7477-7487 PB - Royal Society of Chemistry SN - 20507488 KW - ORGANIC-INORGANIC MATERIALS KW - SOL-GEL POLYMERIZATION KW - ACID-BASE REACTION KW - BRIDGED POLYSILSESQUIOXANES KW - PHOSPHOSILICATE GLASSES KW - VIBRATIONAL-SPECTRA KW - FUEL-CELLS KW - SILSESQUIOXANE KW - PRECURSORS KW - CHEMISTRY UR - http://pubs.rsc.org/en/Content/ArticleLanding/2015/TA/C4TA06823H#!divAbstract L2 - http://pubs.rsc.org/en/Content/ArticleLanding/2015/TA/C4TA06823H#!divAbstract N2 - Non-hydrolytic sol-gel reactions of acetoxysilanes with trimethylsilyl esters of phosphoric and phosphonic acids produce cross-linked matrices containing homogeneous dispersions of silicon and phosphoryl groups connected together by networks of Si-O-P(=O) linkages. These polycondensation reactions proceed cleanly and under mild conditions for a wide variety of precursor silanes RnSi(OAc)(4-n) (R = alkyl, aryl; n = 1, 2) and phosphoryl compounds RP(O)(OSiMe3)(2) (R = alkyl, aryl) to provide hybrid xerogels, the final properties of which are a sensitive function of the organic substituents and the Si : P ratio of the precursors. The reactions of bridged acetoxysilanes (AcO)(3)Si-X-Si(OAc)(3) and phosphoryl reagents (Me3SiO)(2)P(O)-X-P(O)(OSiMe3)(2) have also been investigated and found to produce gels that exhibit large surface areas (up to 700 m(2) g(-1)). The presence of SiO6 structural units in bridged-phosphoryl xerogels is related to their microporosity while the absence of such moieties in bridged-acetoxysilane networks is congruent with significant mesoporosity. Several important parameters are identified which can be used to tailor the properties of these hybrid matrices such that gels with specific polarity, porosity and surface area can be targeted at the time of synthesis. ER -
STÝSKALÍK, Aleš, David ŠKODA, Zdeněk MORAVEC, Michal BABIAK, Craig E. BARNES a Jiří PINKAS. Control of micro/mesoporosity in non-hydrolytic hybrid silicophosphate xerogels. \textit{Journal of Materials Chemistry A}. Royal Society of Chemistry, 2015, roč.~3, č.~14, s.~7477-7487. ISSN~2050-7488. Dostupné z: https://dx.doi.org/10.1039/c4ta06823h.
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