About: Surface modification of phosphosilicate gels: Control of composition, porosity, acidity, and hydrophobicity

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About: Surface modification of phosphosilicate gels: Control of composition, porosity, acidity, and hydrophobicity Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We developed a non-hydrolytic sol-gel synthesis of phosphosilicate gels and hybrid organic-inorganic materials from silicon acetates and trimethylsilyl phosphates and. The inorganic microporous SiOP frameworks with residual surface organic groups was built in a polycondensation reactions within the elimination of acetic acid ester. Herein we report chemical modification reactions of residual acetoxy and trimethylsilyloxy groups by variety of compounds (SiCl4, POCl3, RSiCl3, AlX3, ROH, Me3SiOSiMe3). Our aim was to show the versatility of the primarily synthesized phosphosilicate xerogels in tuning their properties. As an example, the phosphosilicate gels can be modified by alcohols to form Brônsted acidic POH groups on one hand and by aluminum compounds to form Lewis acidic four-coordinated Al atoms on the other hand. The obtained materials and by-products were characterized by liquid and solid-state NMR, IR, BET and elemental analyses. We developed a non-hydrolytic sol-gel synthesis of phosphosilicate gels and hybrid organic-inorganic materials from silicon acetates and trimethylsilyl phosphates and. The inorganic microporous SiOP frameworks with residual surface organic groups was built in a polycondensation reactions within the elimination of acetic acid ester. Herein we report chemical modification reactions of residual acetoxy and trimethylsilyloxy groups by variety of compounds (SiCl4, POCl3, RSiCl3, AlX3, ROH, Me3SiOSiMe3). Our aim was to show the versatility of the primarily synthesized phosphosilicate xerogels in tuning their properties. As an example, the phosphosilicate gels can be modified by alcohols to form Brônsted acidic POH groups on one hand and by aluminum compounds to form Lewis acidic four-coordinated Al atoms on the other hand. The obtained materials and by-products were characterized by liquid and solid-state NMR, IR, BET and elemental analyses. (en)
Title	Surface modification of phosphosilicate gels: Control of composition, porosity, acidity, and hydrophobicity Surface modification of phosphosilicate gels: Control of composition, porosity, acidity, and hydrophobicity (en)
skos:prefLabel	Surface modification of phosphosilicate gels: Control of composition, porosity, acidity, and hydrophobicity Surface modification of phosphosilicate gels: Control of composition, porosity, acidity, and hydrophobicity (en)
skos:notation	RIV/00216224:14740/12:00074156!RIV15-MSM-14740___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0068), P(GAP207/11/0555), P(LH11028), S
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Pinkas, Jiří Stýskalík, Aleš
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Středoevropský technologický institut
http://linked.open...dnocenehoVysledku	172550
http://linked.open...ai/riv/idVysledku	RIV/00216224:14740/12:00074156
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	silicophosphate; bronsted; lewis; acidity; non-hydrolytic; sol-gel (en)
http://linked.open.../riv/klicoveSlovo	acidity sol-gel non-hydrolytic bronsted lewis silicophosphate
http://linked.open...ontrolniKodProRIV	[C4E6C09A0AF9]
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Central european institute of technology Metal Oxides and Phosphates as Nuclear Waste Forms: Sonochemical Precipitation, Thermal Transformations, and Solubility Studies Nonhydrolytic Sol-Gel Reactions for the Synthesis of Silicates and Phosphates with Controlled Porosity and Surface Functionality
http://linked.open...UplatneniVysledku	2012
http://linked.open...iv/tvurceVysledku	Pinkas, Jiří Stýskalík, Aleš Barnes, Craig Elliot
http://localhost/t...ganizacniJednotka	14740

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