Oxidative cleavage of cycloalkanones with dioxygen catalyzed by supported catalysts or homogeneous systems: Evidence for novel active ruthenium (II) and/or (III) species

Autor: Maxence Vennat, Jean-Marie Brégeault

Publikováno v: Applied Catalysis A: General. 386:9-15

α-Substituted cycloalkanones are oxidized to oxo-acids by low-nuclearity complexes (Cu2+ or [VO2]+/[VO]2+ – exchanged Nafion® beads), or homogeneous systems with ruthenium acetate complexes and [Ru(H2O)6] (tosylate)2 in dioxygen (0.1 MPa) at 55�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ec172c7d4c0dd34c8f720f2846b0f49
https://doi.org/10.1016/j.apcata.2010.07.016

Vanadium‐Catalysed Aerobic Cleavage of C−C Bonds in Substituted Cyclohexanones To Afford Carboxylic Acids: Two Model Complexes with Tetrahedral Geometry around Vanadium(V)

Autor: Maxence Vennat, Jean-Marie Brégeault, Patrick Herson, Georgiy B. Shul'pin

Publikováno v: European Journal of Inorganic Chemistry. 2003:908-917

Two monosilanol/disilanol derivatives were synthesised by treatment of Ph3SiOH or Ph2Si(OH)2 with [nBu4N]VO3 (3) in ethanol solution. The mononuclear anionic dioxo vanadium(V) species [{Ph3SiO}2VO2]− (4) and the dinuclear complex anion [{Ph2SiO2VO2

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3381d848428e96dd9f4b03817697fa94
https://doi.org/10.1002/ejic.200390120

Aqueous acidic hydrogen peroxide as an efficient medium for tungsten insertion into MCM-41 mesoporous molecular sieves with high metal dispersion

Autor: Jean-Yves Piquemal, Maxence Vennat, Emmanuel Briot, J.-M. Manoli, Geneviève Chottard, Jean-Marie Brégeault

Publikováno v: Journal of Materials Chemistry. 10:953-958

Two sets of WOx/SiO2-MCM-41 precatalysts (A and B) were prepared and compared. Tungsten-containing MCM-41 mesoporous molecular sieves have been synthesized with tetraethyl orthosilicate and tungsten precursors, tungstic acid, 'H2WO4', or sodium tungs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a0ebdf4dc2297481287de1fd2620e7b6
https://doi.org/10.1039/a908428b

From polyoxometalates to polyoxoperoxometalates and back again; potential applications

Autor: René Thouvenot, Yahdih Mahha, Jean-Yves Piquemal, Maxence Vennat, Laurent Salles, Paul Célestin Bakala, Jean-Marie Brégeault, Emmanuel Briot, Ahmed Atlamsani

Publikováno v: Journal of Molecular Catalysis A: Chemical
Journal of Molecular Catalysis A: Chemical, Elsevier, 2006, pp.177-189
Journal of Molecular Catalysis A: Chemical, 2006, 250, pp.177-189

International audience; This short review is concerned with sustainable chemistry and recent research progress in catalysis systems for the use of aqueous hydrogen peroxide or dioxygen. Some achievements in the development of catalysts for epoxidatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55e18a9ee6a652f4464e1727dfc817e6
https://hal.archives-ouvertes.fr/hal-00160840

Evidence for the presence of Mo(VI), W(VI) or Re(VII) species in silica-based materials. New approaches to highly dispersed oxo-species in mesoporous silicates

Autor: Emmanuel Briot, Jean-Yves Piquemal, Jean-Marie Brégeault, Maxence Vennat, J.-M. Manoli, Geneviève Chottard

Publikováno v: Chemical Communications. :1195-1196

d 0 Transition metal-containing mesoporous molecular sieves are synthesized by the hydrolysis of tetraethyl orthosilicate in aqueous acid, in the presence of neutral or anionic low-condensed Mo(VI) or W(VI) oxo–peroxo or Re(VII) polyoxo species and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a858daab08596fc09f3dc0d9dfb47550
https://doi.org/10.1039/a902537e