Number of the records: 1
Efficient and Reusable Pb(II) Metal-Organic Framework for Knoevenagel Condensation
- 1.
SYSNO ASEP 0492268 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Efficient and Reusable Pb(II) Metal-Organic Framework for Knoevenagel Condensation Author(s) Almáši, M. (SK)
Zeleňák, V. (SK)
Opanasenko, Maksym (UFCH-W) RID, ORCID
Čejka, Jiří (UFCH-W) RID, ORCID, SAISource Title Catalysis Letters - ISSN 1011-372X
Roč. 148, č. 8 (2018), s. 2263-2273Number of pages 11 s. Language eng - English Country US - United States Keywords pillared molecular-sieve ; catalytic-activity ; 2-dimensional zeolites ; mesoporous materials ; trans-carveol ; lewis acidity Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GBP106/12/G015 GA ČR - Czech Science Foundation (CSF) Institutional support UFCH-W - RVO:61388955 UT WOS 000439734700006 EID SCOPUS 85049228703 DOI 10.1007/s10562-018-2471-8 Annotation MWW-type zeolites with different textural properties, namely, MCM-22, MCM-36, MCM-56, and MCM-49, were synthesized and tested in the selective preparation of campholenic aldehyde by isomerization ofpinene oxide. Commercial zeolites USY, Beta, and ZSM-5 were compared. The physico-chemical properties of the studied zeolites were correlated with their catalytic performance in the isomerization ofpinene oxide carried out either in toluene as a solvent at 70 degrees C or in N,N-dimethylacetamide at 140 degrees C.Pinene oxide isomerizes easily in the presence of acids and therefore, high conversions were achieved over commercial as well as synthesized MWW catalysts. Higher selectivities to campholenic aldehyde were achieved over MWW catalysts in basic N,N-dimethylacetamide while non-basic toluene enhanced the formation of the desired aldehyde over all the commercial zeolites. The highest selectivity to the desired aldehyde was achieved over MCM-22 in the reaction performed in N,N-dimethylacetamide at 140 degrees C, being 83% at total conversion ofpinene oxide. This is the best result achieved rivaling homogenous acids (ZnBr2) and metal-organic frameworks. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2019
Number of the records: 1