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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pires, J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2014Activated carbons prepared from industrial pre-treated cork: Sustainable adsorbents for pharmaceutical compounds removalcitations
- 2013Novel Composite Material Polyoxovanadate@MIL-101(Cr): A Highly Efficient Electrocatalyst for Ascorbic Acid Oxidationcitations
- 2013Alkene epoxidation by manganese(III) complexes immobilized onto nanostructured carbon CMK-3citations
- 2012Oxidovanadium(IV) acetylacetonate immobilized onto CMK-3 for heterogeneous epoxidation of geraniolcitations
- 2011Epoxidation of olefins catalyzed by manganese(III) salen complexes grafted to porous heterostructured clayscitations
- 2010Templated synthesis of carbon materials mediated by porous clay heterostructurescitations
- 2005Fatigue damage analysis of aluminised glass fibre compositescitations
- 2004Synthesis and immobilization of molybdenum complexes in a pillared layered claycitations
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article
Alkene epoxidation by manganese(III) complexes immobilized onto nanostructured carbon CMK-3
Abstract
New heterogeneous catalysts were prepared through immobilization of Mn(III) complexes onto CMK-3 with different surface treatments. The [Mn(TF5PP)Cl] and [Mn(5-HOsalhd)Cl] complexes were anchored by a microwave-assisted protocol (CAT I and CAT III, respectively) and the Jacobsen catalyst was immobilized using conventional synthesis conditions (CAT II). XPS and FTIR revealed that the CMK-3 target functionalities for immobilization were the surface oxygen groups. XRD showed that the support treatments led to a decrease of its 2D-hexagonal order, but the complex grafting did not induce changes on the microstructure. CAT I was active in the epoxidation of cis-cyclooctene by H2O2, with substrate conversions and epoxide selectivities in the ranges of 38-30% and 100-97%, respectively, in three cycles with almost no complex leaching. CAT II was active in the epoxidation of 6-cyano-2,2-dimethylchromene using m-CPBA/NMO system with a substrate conversion similar to that of the free complex and higher ee %, but with some Mn leaching in the catalytic runs. CAT III was active in the epoxidation of indene, by H2O2, in ethanol with substrate conversions, epoxide selectivities and ee % values in the ranges of 45-37%, 83-86% and 10-12%, respectively. A correlation between the structural properties of the supports and the reaction times could be proposed. These results highlight the potentiality of CMK-3 to act as support for metal complexes with catalytic properties in oxidation reactions.