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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F12%3A00074156" target="_blank" >RIV/00216224:14740/12:00074156 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Surface modification of phosphosilicate gels: Control of composition, porosity, acidity, and hydrophobicity
Original language 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). Ouraim 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 compoundsto 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.
Czech name
—
Czech description
—

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)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)