2014
Porous aromatic organosilicates by non-hydrolytic sol-gel routes
PINKAS, Jiří, Martin KEJÍK, Zdeněk MORAVEC a Craig E. BARNESZákladní údaje
Originální název
Porous aromatic organosilicates by non-hydrolytic sol-gel routes
Autoři
PINKAS, Jiří (203 Česká republika, garant, domácí), Martin KEJÍK (203 Česká republika, domácí), Zdeněk MORAVEC (203 Česká republika, domácí) a Craig E. BARNES (840 Spojené státy)
Vydání
248th American Chemical Society National Meeting & Exposition, San Francisco, California, USA, 2014
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10402 Inorganic and nuclear chemistry
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 0.269
Kód RIV
RIV/00216224:14740/14:00077574
Organizační jednotka
Středoevropský technologický institut
ISSN
Klíčová slova anglicky
organosilicates; sol-gel; nonhydrolytic
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 20. 5. 2015 20:26, Mgr. Zdeněk Moravec, Ph.D.
Anotace
V originále
A series of porous hybrid organosilicate materials was prepared by non-hydrolytic sol-gel reactions of silicon(IV) acetate with rigid aromatic building blocks bearing phenolic hydroxyl functional groups with focus on readily available compounds that were previously utilized for synthesis of materials such as the porous aromatic frameworks (PAFs) and covalent organic frameworks (COFs). Upon elimination of acetic acid as a byproduct, an organosilicate gel is formed in polar ether solvents. Drying in vacuo offers powdered xerogels. The synthesis procedure was optimized in order to reach the maximum degree of condensation as monitored by gravimetry. All of the prepared materials were found to be amorphous, they do however possess large specific surface areas exceeding 800 m2 g-1 and generally exhibit high thermal stability (up to 400 °C under inert gas). The relationship between the size and symmetry of employed organic linker and the surface properties as well as the degree of condensation and thermal behavior were studied. Additionally the chemical properties and stability of these materials were studied in reactions with a variety of organic, inorganic and organometallic reagents (water, alcohols, phenol, chlorosilanes, AlR3, AlCl3, n-BuLi, ...). A method for post-synthetic replacement of the highly coordinating residual acetate functional groups was also found. Products were characterized by elemental analyses, solid-state 13C, 27Al, and 29Si NMR, IR spectroscopy, surface area analysis, thermal analysis TG/DSC, and XRD measurements.
Návaznosti
| ED1.1.00/02.0068, projekt VaV |
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| EE2.3.30.0037, projekt VaV |
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| LH11028, projekt VaV |
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