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Materials 2014, 7(4), 2650-2668; doi:10.3390/ma7042650

Immobilization of Methyltrioxorhenium on Mesoporous Aluminosilicate Materials

* ,
Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
* Author to whom correspondence should be addressed.
Received: 23 January 2014 / Revised: 13 March 2014 / Accepted: 19 March 2014 / Published: 28 March 2014
(This article belongs to the Section Porous Materials)
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The presented report focuses on an in-depth detailed characterization of immobilized methyltrioxorhenium (MTO), giving catalysts with a wide spectra of utilization. The range of mesoporous materials with different SiO2/Al2O3 ratios, namely mesoporous alumina (MA), aluminosilicates type Siral (with Al content 60%–90%) and MCM-41, were used as supports for immobilization of MTO. The tested support materials (aluminous/siliceous) exhibited high surface area, well-defined regular structure and narrow pore size distribution of mesopores, and therefore represent excellent supports for the active components. Some of the supports were modified by zinc chloride in order to obtain catalysts with higher activities for instance in metathesis reactions. The immobilization of MTO was optimized using these supports and it was successful using all supports. The success of the immobilization of MTO and the properties of the prepared heterogeneous catalysts were characterized using X-ray Fluorescence (XRF), atomic absorption spectroscopy (AAS), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), physical adsorption of N2, ultraviolet-visible spectroscopy (UV-Vis), infrared spectroscopy (FTIR), Fourier Transform Infrared Spectroscopy (FTIR) using pyridine as a probe molecule and X-ray photoelectron spectroscopy (XPS). Furthermore, the catalytic activity of the immobilized MTO on the tested supports was demonstrated on metathesis reactions of various substrates.
Keywords: methyltrioxorhenium; aluminosilicate; MCM-41; mesoporous alumina; metathesis methyltrioxorhenium; aluminosilicate; MCM-41; mesoporous alumina; metathesis
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Stekrova, M.; Zdenkova, R.; Vesely, M.; Vyskocilova, E.; Cerveny, L. Immobilization of Methyltrioxorhenium on Mesoporous Aluminosilicate Materials. Materials 2014, 7, 2650-2668.

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