Non-Hydrolytic Synthesis of Titanosilicate Xerogels by Acetamide Elimination and their Use as Epoxidation Catalysts

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F12%3A00057761" target="_blank" >RIV/00216224:14740/12:00057761 - isvavai.cz</a>
Result on the web
<a href="http://link.springer.com/article/10.1007%2Fs10971-012-2808-5" target="_blank" >http://link.springer.com/article/10.1007%2Fs10971-012-2808-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10971-012-2808-5" target="_blank" >10.1007/s10971-012-2808-5</a>

Result language
angličtina
Original language name
Non-Hydrolytic Synthesis of Titanosilicate Xerogels by Acetamide Elimination and their Use as Epoxidation Catalysts
Original language description
Novel non-hydrolytic syntheses of titanosilicate xerogels by polycondensation of silicon acetate, Si(OAc)4, with titanium (IV) dimethylamide or diethylamide, Ti(NR2)4 (R = Me, Et), are presented. The reactions are based on acetamide elimination and yieldgels with a high content of Si-O-Ti bonds in comparison with the ester elimination route. Although a ligand exchange was observed, it was interestingly not followed by homo-condensation and during the synthesis the phase separation to SiO2 and TiO2 wasavoided. The degree of condensation reached up to 68 %. The xerogels prepared for a comparison by ester elimination from Si(OAc)4 and titanium (IV) isopropoxide featured a significantly lower content of the Si-O-Ti bonds. The initial tests in the epoxidation of cyclohexene by cumyl hydroperoxide (CHP) indicated a high selectivity and moderate activity of the xerogels.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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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)

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

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