Porous organosilicates by non-hydrolytic sol-gel routes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F13%3A00069407" target="_blank" >RIV/00216224:14740/13:00069407 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Porous organosilicates by non-hydrolytic sol-gel routes
Original language description
New non-hydrolytic sol-gel reactions providing hybrid organosilicate materials containing various polyphenolic structural motifs were 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 a byproduct in elimination reactions. Xerogels were obtained by drying under vacuum. The produced materials contain residual acetoxy and phenolic hydroxyl groups allowing for subsequent grafting and surface modification. An impact of the employed spacer molecules and reaction conditions on the degree of condensation and xerogel porosity was studied. The condensation degreewas established by gravimetric techniques and appears to be independent of reaction temperature but strongly depends on the nature of the spacer molecules. Hydroquinone provided gels with the highest value of 91%.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů