English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/19794
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 15 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Vanadium sites in V-K10: Characterization and catalytic properties in liquid-phase sulfide oxidation

AutorKhedher, I.; Ghorbel, A.; Fraile, José M. ; Mayoral, José A.
Palabras claveVanadium catalysts
K10-montmorillonite
Sulfide oxidation
Asymmetric oxidation
Fecha de publicaciónago-2006
EditorElsevier
CitaciónJournal of Molecular Catalysis A: Chemical 255(1-2): 92-96 (2006)
ResumenVanadium-containing K10 was synthesized and characterized by electron paramagnetic resonance, nuclear magnetic resonance, N2 adsorption at 77 K and chemical analysis. Two different vanadium species have been identified in dried V-K10, the first is V4+ in square pyramidal or distorted octahedral environment and the second is V5+ in a tetrahedral environment that is present in an isolated monomeric state (VO43−) and dimeric state [O3VOVO3]4−. When V-K10 was calcined in air, V4+ was oxidized to V5+ with a change in the coordination from square pyramidal or distorted octahedral to tetrahedral. Vanadium species, in the highest oxidation state (V), were found to be the catalytic sites that readily interact with tert-butylhydroperoxide (TBHP) to offer an active and selective catalytic system for the oxidation of sulfides. This catalytic system was studied in the asymmetric oxidation of methyl phenyl sulfide, using two types of chiral modifier, and gives excellent conversions and sulfoxide selectivity, together with an enantioselectivity in the range of 9–11% ee.
Descripción5 pages, 3 tables, 5 figures.
Versión del editorhttp://dx.doi.org/10.1016/j.molcata.2006.03.067
URIhttp://hdl.handle.net/10261/19794
DOI10.1016/j.molcata.2006.03.067
ISSN1381-1169
Aparece en las colecciones: (ICMA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.