Použití palladiových nanočástic nanesených na mesoporézním molekulovém sítě MCM-41 v Heckově reakci: porovnání bazických a neutrálních nosičů

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F07%3A00083517" target="_blank" >RIV/61388955:_____/07:00083517 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The used of palladium nanoparticles supported on MCM-41 mesoporous molecular sieves in Heck reaction: A comparison of basic and neutral supports

Popis výsledku v původním jazyce

Bifunctional supported catalysts were prepared by grafting of chemically reduced palladium nanoparticles onto basic MCM-41 type solid supports. The supports were obtained by ion-exchange with Cs+ or K+ ions from both in-synthesis and post-synthesis Al-doped mesoporous molecular sieves MCM-41 (i.e. (Al)MCM-41 and Al-grafted MCM-41). For a comparison, Pd@Cs+-exchanged zeolite Y and the non-basic Pd@MCM-41 catalyst were also prepared. All supported catalysts were tested in Heck reaction of butyl acrylate and bromobenzene to give n-butyl cinnamate. Catalysts Pd@Cs+-(Al)MCM-41 and Pd@Cs+-Al-grafted MCM-41 proved to be superior to the analogous catalysts reported in the literature in terms of turnover number and turnover frequency. Most active, however, werecatalytic systems obtained from combination of the simple, non-basic Pd@MCM-41 with an external base, which gave the coupling product in 33% after 20 h at 160oC in N,N-dimethylacetamide in the presence of sodium acetate ...

Název v anglickém jazyce

The used of palladium nanoparticles supported on MCM-41 mesoporous molecular sieves in Heck reaction: A comparison of basic and neutral supports

Popis výsledku anglicky

Bifunctional supported catalysts were prepared by grafting of chemically reduced palladium nanoparticles onto basic MCM-41 type solid supports. The supports were obtained by ion-exchange with Cs+ or K+ ions from both in-synthesis and post-synthesis Al-doped mesoporous molecular sieves MCM-41 (i.e. (Al)MCM-41 and Al-grafted MCM-41). For a comparison, Pd@Cs+-exchanged zeolite Y and the non-basic Pd@MCM-41 catalyst were also prepared. All supported catalysts were tested in Heck reaction of butyl acrylate and bromobenzene to give n-butyl cinnamate. Catalysts Pd@Cs+-(Al)MCM-41 and Pd@Cs+-Al-grafted MCM-41 proved to be superior to the analogous catalysts reported in the literature in terms of turnover number and turnover frequency. Most active, however, werecatalytic systems obtained from combination of the simple, non-basic Pd@MCM-41 with an external base, which gave the coupling product in 33% after 20 h at 160oC in N,N-dimethylacetamide in the presence of sodium acetate ...

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

Journal of Molecular Catalysis A: Chemical

ISSN

1381-1169

e-ISSN

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Svazek periodika

274

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

127-132

Kód UT WoS článku

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EID výsledku v databázi Scopus

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