Mesoporous Metallosilicates Prepared by Nonhydrolytic Acetamide Elimination

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F14%3A00076458" target="_blank" >RIV/00216224:14740/14:00076458 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Mesoporous Metallosilicates Prepared by Nonhydrolytic Acetamide Elimination

Popis výsledku v původním jazyce

Non-hydrolytic sol-gel reactions are efficient alternatives to classical aqueous techniques for synthesis of multimetallic oxides and inorganic-organic hybrid materials. This processes provides better reaction control and higher homogeneity of prepared materials. We developed nonhydrolytic sol-gel routes to several groups of metallosilicate materials based on acetamide elimination reactions. This approach is based on the condensation reaction of silicon tetraacetate Si(OAc)4 and metal amides (Ti(NEt2)4,Zr(NEt2)4). Reactions were performed at different molar ratios. Nonhydrolytic condensation leads to formation the Si?O?Ti and Si?O?Zr bonds in the xerogel framework. Diethylacetamide and acetanhydride were confirmed (GC-MS, 1H NMR) as the reaction byproducts. To achieve the mesoporous nature of the material, the reaction was successfully modified by the addition of the Pluronic P123. This copolymer has structure-directing and protecting feature and allows to prepare tough gels.

Název v anglickém jazyce

Mesoporous Metallosilicates Prepared by Nonhydrolytic Acetamide Elimination

Popis výsledku anglicky

Non-hydrolytic sol-gel reactions are efficient alternatives to classical aqueous techniques for synthesis of multimetallic oxides and inorganic-organic hybrid materials. This processes provides better reaction control and higher homogeneity of prepared materials. We developed nonhydrolytic sol-gel routes to several groups of metallosilicate materials based on acetamide elimination reactions. This approach is based on the condensation reaction of silicon tetraacetate Si(OAc)4 and metal amides (Ti(NEt2)4,Zr(NEt2)4). Reactions were performed at different molar ratios. Nonhydrolytic condensation leads to formation the Si?O?Ti and Si?O?Zr bonds in the xerogel framework. Diethylacetamide and acetanhydride were confirmed (GC-MS, 1H NMR) as the reaction byproducts. To achieve the mesoporous nature of the material, the reaction was successfully modified by the addition of the Pluronic P123. This copolymer has structure-directing and protecting feature and allows to prepare tough gels.

Druh

O - Ostatní výsledky

CEP obor

CA - Anorganická chemie

OECD FORD obor

—

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)

Rok uplatnění

2014

Kód důvěrnosti údajů

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