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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

  • DOI - Digital Object Identifier

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

  • Czech description

Classification

  • Type

    O - Miscellaneous

  • CEP classification

    CA - Inorganic chemistry

  • OECD FORD branch

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