Titanosilicate and alumosilicate xerogels by nonhydrolytic sol-gel polycondensation reactions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F12%3A00077592" target="_blank" >RIV/00216224:14740/12:00077592 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Titanosilicate and alumosilicate xerogels by nonhydrolytic sol-gel polycondensation reactions

Popis výsledku v původním jazyce

Titanosilicate xerogels were prepared by nonhydrolytic sol-gel polycondensation reactions between titanium alkoxides Ti(OR)4 (R = iPr, tBu) and acetoxysilanes R4-nSi(OAc)n where n = 1-4 and R = Me, Ph. The ester elimination reactions led to Si-O-Ti networks and acetic acid esters as byproducts. Alumosilicate xerogels were prepared by polycondensation reactions between Al(NMe2)3 or Al(OiPr)3 and acetoxysilanes R4-nSi(OAc)n where n = 1-4 and R = Me, Ph. These elimination reactions proceeded with the formation of Si-O-Al networks and released dimethylacetamide or acetic acid ester and as byproducts, respectively. We investigated the surface modification of these porous xerogels by a variety of reagents to eliminate residual organic groups and to chemically modify their surface. The resulting xerogels and volatile by products were characterized by liquid and solid-state NMR, IR, GC-MS, surface area analysis, TGA, and XRD.

Název v anglickém jazyce

Titanosilicate and alumosilicate xerogels by nonhydrolytic sol-gel polycondensation reactions

Popis výsledku anglicky

Titanosilicate xerogels were prepared by nonhydrolytic sol-gel polycondensation reactions between titanium alkoxides Ti(OR)4 (R = iPr, tBu) and acetoxysilanes R4-nSi(OAc)n where n = 1-4 and R = Me, Ph. The ester elimination reactions led to Si-O-Ti networks and acetic acid esters as byproducts. Alumosilicate xerogels were prepared by polycondensation reactions between Al(NMe2)3 or Al(OiPr)3 and acetoxysilanes R4-nSi(OAc)n where n = 1-4 and R = Me, Ph. These elimination reactions proceeded with the formation of Si-O-Al networks and released dimethylacetamide or acetic acid ester and as byproducts, respectively. We investigated the surface modification of these porous xerogels by a variety of reagents to eliminate residual organic groups and to chemically modify their surface. The resulting xerogels and volatile by products were characterized by liquid and solid-state NMR, IR, GC-MS, surface area analysis, TGA, and XRD.

Druh

O - Ostatní výsledky

CEP obor

CE - Biochemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů