About: Hybrid organosilicate materials by non-hydrolytic sol-gel synthesis

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A non-hydrolytic sol-gel synthesis of new hybrid organosilicate materials containing various phenolic and bisphenolic structural motifs was developed. Mesoporous gels are formed in polycondensation reactions of multifunctional phenols, such as hydroquinone, 4,4-dihydroxybiphenyl, bisphenol A, and phloroglucinol with silicon(IV) acetate in polar ether solvent. Acetic acid was identified as an elimination reaction byproduct. Xerogels were obtained upon drying in vacuo and the produced materials contain residual acetoxy and phenolic hydroxyl groups allowing for later grafting and surface modification. An impact of employed spacer molecule and reaction conditions on the degree of condensation and xerogel porosity was studied. Condensation degree was established by gravimetric techniques and appears to be independent of reaction temperature but strongly depends on the nature of the spacer molecule. Hydroquinone provided gels with the highest value of 91%. A non-hydrolytic sol-gel synthesis of new hybrid organosilicate materials containing various phenolic and bisphenolic structural motifs was developed. Mesoporous gels are formed in polycondensation reactions of multifunctional phenols, such as hydroquinone, 4,4-dihydroxybiphenyl, bisphenol A, and phloroglucinol with silicon(IV) acetate in polar ether solvent. Acetic acid was identified as an elimination reaction byproduct. Xerogels were obtained upon drying in vacuo and the produced materials contain residual acetoxy and phenolic hydroxyl groups allowing for later grafting and surface modification. An impact of employed spacer molecule and reaction conditions on the degree of condensation and xerogel porosity was studied. Condensation degree was established by gravimetric techniques and appears to be independent of reaction temperature but strongly depends on the nature of the spacer molecule. Hydroquinone provided gels with the highest value of 91%. (en)
Title	Hybrid organosilicate materials by non-hydrolytic sol-gel synthesis Hybrid organosilicate materials by non-hydrolytic sol-gel synthesis (en)
skos:prefLabel	Hybrid organosilicate materials by non-hydrolytic sol-gel synthesis Hybrid organosilicate materials by non-hydrolytic sol-gel synthesis (en)
skos:notation	RIV/00216224:14740/13:00069401!RIV14-MSM-14740___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0068), P(LH11028)
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Kejík, Martin Pinkas, Jiří Moravec, Zdeněk
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	78395
http://linked.open...ai/riv/idVysledku	RIV/00216224:14740/13:00069401
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Organosilicate; Hybrid Materials; Non-Hydrolytic; Sol-Gel (en)
http://linked.open.../riv/klicoveSlovo	Hybrid Materials Non-Hydrolytic Organosilicate Sol-Gel
http://linked.open...ontrolniKodProRIV	[2DD26DEF788C]
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Central european institute of technology Nonhydrolytic Sol-Gel Reactions for the Synthesis of Silicates and Phosphates with Controlled Porosity and Surface Functionality
http://linked.open...UplatneniVysledku	2013
http://linked.open...iv/tvurceVysledku	Moravec, Zdeněk Pinkas, Jiří Barnes, Craig Kejík, Martin
http://localhost/t...ganizacniJednotka	14740

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