Surface reactivity of non-hydrolytic silicophosphate xerogels:
a simple method to create Bronsted or Lewis acid sites on
porous supports

J 2016

Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Bronsted or Lewis acid sites on porous supports

STÝSKALÍK, Aleš; David ŠKODA; Zdeněk MORAVEC; Craig E. BARNES; Jiří PINKAS et al.

Základní údaje

Originální název

Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Bronsted or Lewis acid sites on porous supports

Autoři

STÝSKALÍK, Aleš; David ŠKODA; Zdeněk MORAVEC; Craig E. BARNES a Jiří PINKAS

Vydání

New Journal of Chemistry, Cambridge, ROYAL SOC. CHEMISTRY, 2016, 1144-0546

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10402 Inorganic and nuclear chemistry

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.269

Kód RIV

RIV/00216224:14740/16:00089879

Organizační jednotka

Středoevropský technologický institut

DOI

https://doi.org/10.1039/c5nj02928g

UT WoS

000373993600087

EID Scopus

2-s2.0-84964613911

Klíčová slova anglicky

Non-hydrolytic; sol-gel; silicon acetate; silicophosphate; xerogel; heterogeneous; catalysis; Lewis acid; Bronsted acid

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 22. 2. 2017 12:57, Mgr. Eva Špillingová

Anotace

V originále

Non-hydrolytic sol-gel reactions of silicon acetates with trimethylsilyl (TMS) esters of phosphoric and phosphonic acids produce cross-linked matrices containing homogeneous dispersions of silicate and phosphoryl groups connected together by networks of Si-O-P(QO) linkages. The condensation degrees reach 80 to 90%. Residual organic groups (10 to 20%) were reacted with a variety of compounds (H2O, Me3SiOSiMe3, POCl3, SiCl4, AlMe3, Al(NMe2)(3), and AlCl3) in order to enrich the surface of these porous matrices with Bronsted (RP-OH) and Lewis (tetracoordinated Al) acid functional groups. The differences in the reactivity of RSi-OAc and RP-OSiMe3 groups were utilized for the selective modification at the silicon and phosphorus atoms. The reaction procedures were optimized and significantly porous silicophosphate materials with a high content of either hydroxyl groups or four-coordinated aluminium species were obtained. The activity and selectivity of prepared samples as catalysts for the dimerization of a-methylstyrene were tested. Excellent activities and moderate to very high selectivities were achieved suggesting the potential use of silicophosphate xerogels in heterogeneous catalysis.

Návaznosti

LQ1601, projekt VaV

Název: CEITEC 2020 (Akronym: CEITEC2020)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, CEITEC 2020

Citovat

STÝSKALÍK, Aleš; David ŠKODA; Zdeněk MORAVEC; Craig E. BARNES a Jiří PINKAS. Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Bronsted or Lewis acid sites on porous supports. New Journal of Chemistry. Cambridge: ROYAL SOC. CHEMISTRY, 2016, roč. 40, č. 4, s. 3705-3715. ISSN 1144-0546. Dostupné z: https://doi.org/10.1039/c5nj02928g.

@article{1344772,
   author = {Stýskalík, Aleš and Škoda, David and Moravec, Zdeněk and Barnes, Craig E. and Pinkas, Jiří},
   article_location = {Cambridge},
   article_number = {4},
   doi = {https://doi.org/10.1039/c5nj02928g},
   keywords = {Non-hydrolytic; sol-gel; silicon acetate; silicophosphate; xerogel; heterogeneous; catalysis; Lewis acid; Bronsted acid},
   language = {eng},
   issn = {1144-0546},
   journal = {New Journal of Chemistry},
   title = {Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Bronsted or Lewis acid sites on porous supports},
   url = {http://pubs.rsc.org/en/Content/ArticleLanding/2016/NJ/C5NJ02928G#!divAbstract},
   volume = {40},
   year = {2016}
}

TY  - JOUR
ID  - 1344772
AU  - Stýskalík, Aleš - Škoda, David - Moravec, Zdeněk - Barnes, Craig E. - Pinkas, Jiří
PY  - 2016
TI  - Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Bronsted or Lewis acid sites on porous supports
JF  - New Journal of Chemistry
VL  - 40
IS  - 4
SP  - 3705-3715
EP  - 3705-3715
PB  - ROYAL SOC. CHEMISTRY
SN  - 11440546
KW  - Non-hydrolytic
KW  - sol-gel
KW  - silicon acetate
KW  - silicophosphate
KW  - xerogel
KW  - heterogeneous
KW  - catalysis
KW  - Lewis acid
KW  - Bronsted acid
UR  - http://pubs.rsc.org/en/Content/ArticleLanding/2016/NJ/C5NJ02928G#!divAbstract
L2  - http://pubs.rsc.org/en/Content/ArticleLanding/2016/NJ/C5NJ02928G#!divAbstract
N2  - Non-hydrolytic sol-gel reactions of silicon acetates with trimethylsilyl (TMS) esters of phosphoric and phosphonic acids produce cross-linked matrices containing homogeneous dispersions of silicate and phosphoryl groups connected together by networks of Si-O-P(QO) linkages. The condensation degrees reach 80 to 90%. Residual organic groups (10 to 20%) were reacted with a variety of compounds (H2O, Me3SiOSiMe3, POCl3, SiCl4, AlMe3, Al(NMe2)(3), and AlCl3) in order to enrich the surface of these porous matrices with Bronsted (RP-OH) and Lewis (tetracoordinated Al) acid functional groups. The differences in the reactivity of RSi-OAc and RP-OSiMe3 groups were utilized for the selective modification at the silicon and phosphorus atoms. The reaction procedures were optimized and significantly porous silicophosphate materials with a high content of either hydroxyl groups or four-coordinated aluminium species were obtained. The activity and selectivity of prepared samples as catalysts for the dimerization of a-methylstyrene were tested. Excellent activities and moderate to very high selectivities were achieved suggesting the potential use of silicophosphate xerogels in heterogeneous catalysis.
ER  -

STÝSKALÍK, Aleš; David ŠKODA; Zdeněk MORAVEC; Craig E. BARNES a Jiří PINKAS. Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Bronsted or Lewis acid sites on porous supports. \textit{New Journal of Chemistry}. Cambridge: ROYAL SOC. CHEMISTRY, 2016, roč.~40, č.~4, s.~3705-3715. ISSN~1144-0546. Dostupné z: https://doi.org/10.1039/c5nj02928g.

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