| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Dorbes, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (1/1 displayed)
Places of action
| Organizations | Location | People |
|---|
article
Oxidovanadium(IV) acetylacetonate immobilized onto CMK-3 for heterogeneous epoxidation of geraniol
Abstract
Heterogeneous catalysts based on oxidovanadium(IV) acetylacetonate ([VO(acac)(2)]) immobilized onto nanostructured ordered carbon material CMK-3 were prepared using two different strategies: (i) direct anchoring of the metal complex through the surface oxygen groups of the pristine support (CAT I) and (ii) immobilization via 3-aminopropyltriethoxysilane spacer previously grafted onto the support (CAT II). The metal complex immobilization through both methods was confirmed by X-ray photoelectron spectroscopy, elemental analysis. Fourier transform infrared spectroscopy and thermogravimetry. Xray diffraction (XRD) analysis provided insights on the materials rod-like structure and suggested the existence of some expansion of the CMK-3 network upon the complex immobilization. The new materials were tested as heterogeneous catalysts in the epoxidation of geraniol using tertbutyl hydroperoxide as oxidant leading to substrate conversions higher than 98% after 2.5 h and 98-99% selectivity for the 2,3-epoxygeraniol product. The improved catalytic performance observed for the new materials when compared to other heterogenized [VO(acac)(2)] based catalysts was attributed to an efficient mass transfer provided by the rod-like structure of CMK-3 supports. When APTES was used as the linker for complex immobilization (CAT II), negligible catalyst leaching and higher substrate conversions were observed when compared to CAT I upon recycling and reuse. Furthermore, XRD provided evidence for the preservation of the rod-like structure of the support upon the catalytic reactions.