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Preparation of heterogeneous catalysts supported on mesoporous molecular sieves modified with various N-groups and their use in the Heck reaction
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SYSNO ASEP 0322941 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Preparation of heterogeneous catalysts supported on mesoporous molecular sieves modified with various N-groups and their use in the Heck reaction Title Příprava heterogenních katalyzátorů na mezoporézních molekulových sítech s různými N-skupinami a jejich použití v Heckově reakci Author(s) Demel, Jan (UFCH-W)
Sujandi, X. (KR)
Park, S. - Y. (KR)
Čejka, Jiří (UFCH-W) RID, ORCID, SAI
Štěpnička, P. (CZ)Source Title Journal of Molecular Catalysis A-Chemical. - : Elsevier - ISSN 1381-1169
Roč. 302, 1-2 (2009), s. 28-35Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords supported catalysis ; palladium ; bifunctional catalysts ; nanoparticles Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects LC06070 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA104/09/0561 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000265310100006 DOI 10.1016/j.molcata.2008.11.025 Annotation A series of supported catalysts has been prepared from palladium(II) acetate and mesoporous molecular sieves bearing various N-donor groups at their surface and probed in the Heck coupling between n-butyl acrylate and bromobenzene to give n-butyl cinnamate. The results indicate that the catalytic activity as well as the amount of leached metal depends on the nature of the nitrogen modifying group. The best catalysts were obtained from the sieves bearing the ≡SiCH2CH2CH2NH2 or ≡SiCH2CH2CH2NHCH2CH2NEt2 groups at the surface. When combined with sodium acetate, the former catalyst provided the coupling product with conversions as high as 84% under microwave irradiation for 30 min and 84% under solvothermal conditions (160 oC/4 h) whereas application of the latter catalyst resulted in conversions 90% and 71% under identical reaction conditions (all at 1 mol% Pd loading). Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2010
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