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Spectroscopic, calorimetric, and catalytic evidences of hydrophobicity on Ti-MCM-41 silylated materials for olefin epoxidations

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Spectroscopic, calorimetric, and catalytic evidences of hydrophobicity on Ti-MCM-41 silylated materials for olefin epoxidations

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dc.contributor.author Silvestre Albero, Joaquin es_ES
dc.contributor.author Domine ., Marcelo Eduardo es_ES
dc.contributor.author Jorda Moret, Jose Luis es_ES
dc.contributor.author Navarro Villalba, Mª Teresa es_ES
dc.contributor.author Rey Garcia, Fernando es_ES
dc.contributor.author Rodriguez-Reinoso, Francisco es_ES
dc.contributor.author Corma Canós, Avelino es_ES
dc.date.accessioned 2016-10-07T12:26:46Z
dc.date.available 2016-10-07T12:26:46Z
dc.date.issued 2015-10-25
dc.identifier.issn 0926-860X
dc.identifier.uri http://hdl.handle.net/10251/71399
dc.description.abstract tHydrophobic Ti-MCM-41 samples prepared by post-synthesis silylation treatment demonstrate to behighly active and selective catalysts in olefins epoxidation by using organic hydroperoxides as oxidizingagents in liquid phase reaction systems. Epoxide yields show important enhancements with increasedsilylation degrees of the Ti-mesoporous samples. Catalytic studies are combined and correlated withspectroscopic techniques (e.g. XRD, XANES, UV-Visible,29Si MAS-NMR) and calorimetric measurementsto better understand the changes in the surface chemistry of Ti-MCM-41 samples due to the post-synthesis silylation treatment and to ascertain the role of these trimethylsilyl groups incorporated inolefin epoxidation. In such manner, the effect of the organic moieties on solids, and both water and gly-col molecules contents on the catalytic activity and selectivity are analyzed in detail. Results show thatthe hydrophobicity level of the samples is responsible for the decrease in water adsorption and, conse-quently, the negligible formation of the non-desired glycol during the catalytic process. Thus, catalystdeactivation by glycol poisoning of Ti active sites is greatly diminished, this increasing catalyst stabilityand leading to practically quantitative production of the corresponding epoxide. The extended use ofthese hydrophobic Ti-MCM-41 catalysts together with organic hydroperoxides for the highly efficientand selective epoxidation of natural terpenes is also exemplified. es_ES
dc.description.sponsorship The authors gratefully acknowledge financial support of Spanish Government (MAT2012-38567-C02-01, Consolider-Ingenio 2010-Multicat CSD-2009-00050 and Severo Ochoa SEV-2012-0267) and Generalitat Valenciana (Project Prometeo). M.E.D. also thanks funds from Spanish Government (CTQ-2011-27550) and CSIC (PIE 2009801063). J.S.A. and F.R.R. acknowledge financial support from MINECO (Projects MAT2013-45008-p and CONCERT Project-NASEMS (PCIN-2013-057), and from Generalitat Valenciana (PROMETEO2009/002). en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Spanish Government MAT2012-38567-C02-01 CSD-2009-00050 SEV-2012-0267 CTQ-2011-27550 es_ES
dc.relation Generalitat Valenciana (Project Prometeo) es_ES
dc.relation CSIC PIE 2009801063 es_ES
dc.relation MINECO MAT2013-45008-p es_ES
dc.relation CONCERT Project-NASEMS PCIN-2013-057 es_ES
dc.relation Generalitat Valenciana PROMETEO2009/002 es_ES
dc.relation.ispartof Applied Catalysis A: General es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Hydrophobic materials es_ES
dc.subject Ti-MCM-41 catalyst es_ES
dc.subject Silylation treatment es_ES
dc.subject Immersion calorimetry es_ES
dc.subject Catalytic epoxidation es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.title Spectroscopic, calorimetric, and catalytic evidences of hydrophobicity on Ti-MCM-41 silylated materials for olefin epoxidations es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.apcata.2015.09.029
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.description.bibliographicCitation Silvestre Albero, J.; Domine ., ME.; Jorda Moret, JL.; Navarro Villalba, MT.; Rey Garcia, F.; Rodriguez-Reinoso, F.; Corma Canós, A. (2015). Spectroscopic, calorimetric, and catalytic evidences of hydrophobicity on Ti-MCM-41 silylated materials for olefin epoxidations. Applied Catalysis A: General. 507:14-25. doi:10.1016/j.apcata.2015.09.029 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.apcata.2015.09.029 es_ES
dc.description.upvformatpinicio 14 es_ES
dc.description.upvformatpfin 25 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 507 es_ES
dc.relation.senia 304964 es_ES
dc.identifier.eissn 1873-3875


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