caa a22 4500 606174141 CHVBK 20210128100736.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s11244-015-0373-1 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0373-1 Catalytic Epoxidation of Cyclohexene with Tert-butylhydroperoxide Using an Immobilized Molybdenum Catalyst [Elektronische Daten] [S. Morales-delaRosa, J. Campos-Martin, P. Terreros, J. Fierro] This work describes the synthesis of molybdenum complexes immobilized on a silica support and their performance in the epoxidation reaction of cyclohexene using tert-butylhydroperoxide as the oxidizing agent. The catalyst synthesis included solubilization of variable amounts of bis-oxomolybdenum (VI) acetylacetonate precursor in different solvents such as tetrahydrofuran (THF), ethanol, THF/water and ethanol/water mixtures and contact with the silica support. Characterization techniques demonstrated that the nature of the incorporated molybdenum species depends markedly on the solvent employed. If the solvent employed is an ethanol:water mixture, physical adsorption of the Mo-species onto the support surface occurs; however, when THF is used as the solvent (THF catalyst series), molybdenum is grafted on the silica surface via chemical bonding with the surface hydroxyl groups of silica. Specifically, these latter catalysts show similar performance to that of the homogeneous catalyst, although long-term experiments showed deactivation by leaching of the active phase. Springer Science+Business Media New York, 2015 Epoxidation nationallicence Molybdenum nationallicence Immobilized catalysts nationallicence Tert-butylhydroperoxide nationallicence Morales-delaRosa S. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Campos-Martin J. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Terreros P. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Fierro J. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/4-6(2015-04-01), 325-333 1022-5528 58:4-6<325 2015 58 11244 https://doi.org/10.1007/s11244-015-0373-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0373-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Morales-delaRosa S. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 700 1- Campos-Martin J. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 700 1- Terreros P. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 700 1- Fierro J. Sustainable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049, Madrid, Spain aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/4-6(2015-04-01), 325-333 1022-5528 58:4-6<325 2015 58 11244