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Statements

Subject Item
n2:RIV%2F00216224%3A14740%2F13%3A00069404%21RIV14-MSM-14740___
rdf:type
n7:Vysledek skos:Concept
dcterms:description
A non-hydrolytic sol-gel synthesis of new mesoporous organosilicate materials containing phenolic and bisphenolic structural motifs was developed. Xerogels are formed in polycondensation reactions of multifunctional phenols, such as hydroquinone, 4,4-dihydroxybiphenyl, bisphenol A, and phloroglucinol with silicon 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 mesoporous organosilicate materials containing phenolic and bisphenolic structural motifs was developed. Xerogels are formed in polycondensation reactions of multifunctional phenols, such as hydroquinone, 4,4-dihydroxybiphenyl, bisphenol A, and phloroglucinol with silicon 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%.
dcterms:title
Synthesis of Organosilicate Gels by Non-Hydrolytic Reactions of Silicon Acetate Synthesis of Organosilicate Gels by Non-Hydrolytic Reactions of Silicon Acetate
skos:prefLabel
Synthesis of Organosilicate Gels by Non-Hydrolytic Reactions of Silicon Acetate Synthesis of Organosilicate Gels by Non-Hydrolytic Reactions of Silicon Acetate
skos:notation
RIV/00216224:14740/13:00069404!RIV14-MSM-14740___
n7:predkladatel
n10:orjk%3A14740
n3:aktivita
n4:P
n3:aktivity
P(ED1.1.00/02.0068), P(LH11028)
n3:dodaniDat
n9:2014
n3:domaciTvurceVysledku
n12:6417108 n12:2274329 n12:2451077
n3:druhVysledku
n6:O
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
109545
n3:idVysledku
RIV/00216224:14740/13:00069404
n3:jazykVysledku
n15:eng
n3:klicovaSlova
Organosilicates; Non-Hydrolytic; Sol-Gel; Silicon Acetate
n3:klicoveSlovo
n8:Silicon%20Acetate n8:Non-Hydrolytic n8:Sol-Gel n8:Organosilicates
n3:kontrolniKodProRIV
[EB47256A0A1A]
n3:obor
n17:CA
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n14:LH11028 n14:ED1.1.00%2F02.0068
n3:rokUplatneniVysledku
n9:2013
n3:tvurceVysledku
Pinkas, Jiří Kejík, Martin Moravec, Zdeněk Barnes, Craig
n16:organizacniJednotka
14740