Non-Hydrolytic Sol-Gel Synthesis of Metallosilicates and Phosphosilicates from Silicon Acetate

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Non-Hydrolytic Sol-Gel Synthesis of Metallosilicates and Phosphosilicates from Silicon Acetate

Popis výsledku v původním jazyce

We studied non-hydrolytic sol-gel reactions to prepare several classes of metallosilicate and phosphosilicate hybrid inorganic-organic materials based on polycondensation reactions between silicon acetate or acetoxysilanes 1RxSi(OC(O)CH3)4-x (1R = Me, Ph; n = 0-2) and phosphoric and phosphonic acid trimethylsilylesters 2RP(O)(OSiMe3)2 (2R = OSiMe3, c-Hex, Ph), metal amides M(N3R2)n (M = Al, Ti; 3R = Me, Et; n = 3, 4) and metal alkoxides M(O4R)n (M = Al, Ti; 4R = i-Pr, t-Bu, SiMe3; n = 3, 4) in aprotic dry solvents. Phosphosilicate xerogels were prepared by the elimination of acetic acid ester from Si(OC(O)CH3)4 and P(O)(OSiMe3)3. The 29Si CPMAS NMR spectra revealed the presence of two types of six-coordinate silicon centers SiO6. The surface area and condensation degree could be controlled by the reaction parameters, such as solvent, temperature, and time. Mixtures of silicon acetate and acetoxysilanes and trimethylsilyl phosphates provided hybrid gels.

Název v anglickém jazyce

Non-Hydrolytic Sol-Gel Synthesis of Metallosilicates and Phosphosilicates from Silicon Acetate

Popis výsledku anglicky

We studied non-hydrolytic sol-gel reactions to prepare several classes of metallosilicate and phosphosilicate hybrid inorganic-organic materials based on polycondensation reactions between silicon acetate or acetoxysilanes 1RxSi(OC(O)CH3)4-x (1R = Me, Ph; n = 0-2) and phosphoric and phosphonic acid trimethylsilylesters 2RP(O)(OSiMe3)2 (2R = OSiMe3, c-Hex, Ph), metal amides M(N3R2)n (M = Al, Ti; 3R = Me, Et; n = 3, 4) and metal alkoxides M(O4R)n (M = Al, Ti; 4R = i-Pr, t-Bu, SiMe3; n = 3, 4) in aprotic dry solvents. Phosphosilicate xerogels were prepared by the elimination of acetic acid ester from Si(OC(O)CH3)4 and P(O)(OSiMe3)3. The 29Si CPMAS NMR spectra revealed the presence of two types of six-coordinate silicon centers SiO6. The surface area and condensation degree could be controlled by the reaction parameters, such as solvent, temperature, and time. Mixtures of silicon acetate and acetoxysilanes and trimethylsilyl phosphates provided hybrid gels.

Druh

O - Ostatní výsledky

CEP obor

CA - Anorganická chemie

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)

Rok uplatnění

2013

Kód důvěrnosti údajů

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