Hydrophobicity Boosts Catalytic Activity: The Tailoring of Aluminosilicates with Trimethylsilyl Groups

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00573305" target="_blank" >RIV/61388955:_____/23:00573305 - isvavai.cz</a>

Alternative codes found

RIV/61389013:_____/23:00573305 RIV/00216224:14310/23:00131009

Result on the web

<a href="https://hdl.handle.net/11104/0343769" target="_blank" >https://hdl.handle.net/11104/0343769</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cctc.202300449" target="_blank" >10.1002/cctc.202300449</a>

Result language

angličtina

Original language name

Hydrophobicity Boosts Catalytic Activity: The Tailoring of Aluminosilicates with Trimethylsilyl Groups

Original language description

Introducing organic groups into metal silicate catalysts and thus supposedly changing the surface hydrophobicity has been shown to enhance the catalyst performance in various reactions. However, the organic groups introduction does not unambiguously guarantee hydrophobicity control. Therefore, a thorough characterization is necessary to provide a complete view of the interaction between the catalyst surface, reactants, and products. Herein, an aluminosilicate catalyst with well-dispersed Al atoms was prepared via the non-hydrolytic sol-gel method. This material was post-synthetically modified with trimethylsilyl groups. Their number on the catalyst surface was controlled via a temperature-vacuum pretreatment. In such a way, aluminosilicate materials with similar porosity, structure, and acid site strength and quality were obtained. Notably, the water sorption measurements showed that trimethylsilylated aluminosilicates adsorb 2.5–3 times less water than the parent material (p/p0=0.3). The turn-over-frequency in epoxide ring opening and ethanol dehydration scaled up with the number of trimethylsilyl groups grafted on the catalyst surface. Particularly, the heavily trimethylsilylated sample achieved three to five times higher turnover-frequency in styrene oxide aminolysis than the parent aluminosilicate material. To the best of the authors’ knowledge, it exhibited the most active Al sites for epoxide aminolysis in the present literature.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

ChemCatChem

ISSN

1867-3880

e-ISSN

1867-3899

Volume of the periodical

15

Issue of the periodical within the volume

13

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

e202300449

UT code for WoS article

001005890400001

EID of the result in the Scopus database

2-s2.0-85161626858