Dioxomolybdenum(VI) modified mesoporous materials for the catalytic epoxidation of olefins

Bruno, Sofia M.; Fernandes, José A.; Martins, Luísa S.; Gonçalves, Isabel S.; Pillinger, Martyn; Ribeiro‐Claro, Paulo J. A.; Rocha, João; Valente, Anabela A.

doi:10.1016/j.cattod.2006.01.007

Cited by 72 publications

(27 citation statements)

References 42 publications

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“…[25,26] A slight improvement was obtained with 1,4-diazabutadiene, [27,28] but real progress was made with pyrazoylpyridine ligands, tethered with an amide functionalized spacer. [29] Likewise, oxido-peroxidomolybdenum complexes, well known as epoxidation catalysts, were anchored on mesoporous surfaces by an acetamide spacer bearing a pyrazoylpyridine ligand. [30,31] The system showed no significant leaching and was as active as the corresponding homogeneous catalyst.…”

Section: Introductionmentioning

confidence: 99%

Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO₂

et al. 2010

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The easy covalent bonding of an OH-bearing molecule onto a metal oxide surface can be done by transesterifying a trimethylsilylated hydroxy function with the surface OH groups. This results in the grafting of the organic molecule directly on the matrix, accompanied by the formation of trimethylsilanol, which can easily be eliminated as volatile hexamethyldisiloxane and water. This was accomplished on a TiO 2 matrix with three carboxylic acids: acetic, isonicotinic,

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Section: Introductionmentioning

confidence: 99%

Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO₂

et al. 2010

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“…The epoxidation reactions are performed using mainly heterogeneous catalysts and hydrogen peroxide as an oxidant [5][6][7][8][9][10][11][12]; however, the use of a homogeneous catalyst was also reported [13]. Dioxygen [14][15][16][17] and tert-butyl hydroperoxide [18][19][20][21] were used as oxidants in epoxidation of limonene as well. Recently, [22] epoxidation of limonene was performed using acetylperoxyborate (which decomposes to peracetic acid and hydrogen peroxide) catalyzed by metal-ion-substituted aluminophosphates.…”

Section: Introductionmentioning

confidence: 99%

Iron(II, III)-Catalyzed Oxidation of Limonene by Dioxygen

2007

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Labile iron(II) and iron(III) complexes {[Fe II (bpy) 2 2+ ] solv and [Fe III (bpy) 2 3+] solv } in acetonitrile activate dioxygen for the oxidation of limonene to produce mainly carvone, carveol, limonene oxide, and perillaldehyde. Iron(III) complex is reduced by the substrate to iron(II) one, which activates dioxygen. Probably the catalyst interacts with substrate prior to the oxidation process. Perillaldehyde is likely formed directly from oxidation of methyl group (not via alcohol). However, the aldehyde is also reduced to perillyl alcohol by the reduced form of the catalyst.

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“…The pore size distributions were obtained from the adsorption branches of the isotherms, using the BJH method with the modified Kelvin equation and a correction for the statistical film thickness of the pore walls. The Harkins-Jura equation was used to calculate the statistical film thickness in the p/p 0 range of 0.1-0.95 [21].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

A new and easy method for anchoring manganese salen on MCM-41

et al. 2007

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This work reports a new method to covalently attach manganese salophen complex onto MCM-41, using a diisocyanate as a binder. The prepared catalyst was tested on the liquid phase limonene oxidation reaction. Diluted t-Butyl hydroperoxide was used as oxygen supplier. Limonene oxide, carveol and carvone are formed, but the main product obtained was a polymer. The preservation of the MCM-41 channel system was checked by X-ray diffraction and nitrogen adsorption analysis. The use of the same catalyst sample in four consecutive experiments, without loss of activity, is a confirmation of the success of the anchoring process.

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Dioxomolybdenum(VI) modified mesoporous materials for the catalytic epoxidation of olefins

Cited by 72 publications

References 42 publications

Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO₂

Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO₂

Iron(II, III)-Catalyzed Oxidation of Limonene by Dioxygen

A new and easy method for anchoring manganese salen on MCM-41

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Dioxomolybdenum(VI) modified mesoporous materials for the catalytic epoxidation of olefins

Cited by 72 publications

References 42 publications

Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO2

Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO2

Iron(II, III)-Catalyzed Oxidation of Limonene by Dioxygen

A new and easy method for anchoring manganese salen on MCM-41

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Product

Resources

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Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO₂

Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO₂