I. Muylaert

Covalent immobilization of the Jacobsen catalyst on mesoporous phenolic polymer: a highly enantioselective and stable asymmetric epoxidation catalyst

J. De Decker, T. Bogaerts, I. Muylaert, S. Delahaye, F. Lynen, V. Van Speybroeck, A. Verberckmoes, P. Van der Voort
Materials Chemistry and Physics
141 (2013), 967-972


The Jacobsen catalyst, N,N′-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminomanganese (III) chloride is covalently immobilized on mesoporous phenolic resin through a direct and simple procedure. The immobilization is evident from nitrogen sorption and quantitative XRF measurements. A complex loading of 0.09 mmol g−1 is obtained, corresponding to well dispersed Mn-complexes on the surface of the mesoporous phenolic resin. This novel catalytic system shows good catalytic activity and excellent enantioselectivity in the asymmetric epoxidation of 1,2-dialin. The heterogenized Jacobsen catalyst is demonstrated to be a re-usable and non-leaching catalytic system.

Open Access version available at UGent repository

A coordinative saturated vanadium containing metal organic framework that shows a remarkable catalytic activity

K. Leus, I. Muylaert, V. Van Speybroeck, G.B. Marin, P. Van der Voort
Studies in Surface Science and Catalysis
175, 329-332


A completely saturated Metal Organic Framework, MIL-47 was synthesized and tested for its catalytic performance in the oxidation of cyclohexene with tert-butyl hydroperoxide as oxidant. The catalyst was compared to several reference catalysts: namely VAPO-5, supported VOx/SiO2 and the homogeneous catalyst VO(acac)2. MIL-47 shows a remarkable catalytic activity and preserves its crystalline structure and surface area after a catalytic run. Furthermore MIL-47 exhibits a very high activity in successive runs.

The remarkable catalytic activity of the saturated metal organic framework V-MIL-47 in the cyclohexeneoxidation

K. Leus, I. Muylaert, M. Vandichel, G.B. Marin, M. Waroquier, V. Van Speybroeck, P. Van der Voort
Chemical Communications
46, 5085-5087


The remarkable catalytic activity of the saturated metal organic framework MIL-47 in the epoxidation of cyclohexene is elucidated by means of both experimental results and theoretical calculations.

Open Access version available at UGent repository

The coordinatively saturated vanadium MIL-47 as a low leaching heterogeneous catalyst in the oxidation of cyclohexene

K. Leus, M. Vandichel, Y-Y Liu, I. Muylaert, J. Musschoot, H. Vrielinck, F. Callens, G.B. Marin, C. Detavernier, Y.Z. Khimyak, M. Waroquier, V. Van Speybroeck, P. Van der Voort
Journal of Catalysis
285 (1) 196-207


A Metal Organic Framework, containing coordinatively saturated V+IV sites linked together by terephthalic linkers (V-MIL-47), is evaluated as a catalyst in the epoxidation of cyclohexene. Different solvents and conditions are tested and compared. If the oxidant TBHP is dissolved in water, a significant leaching of V-species into the solution is observed, and also radical pathways are prominently operative leading to the formation of an adduct between the peroxide and cyclohexene. If, however, the oxidant is dissolved in decane, leaching is negligible and the structural integrity of the V-MIL-47 is maintained during successive runs. The selectivity toward the epoxide is very high in these circumstances. Extensive computational modeling is performed to show that several reaction cycles are possible. EPR and NMR measurements confirm that at least two parallel catalytic cycles are co-existing: one with V+IV sites and one with pre-oxidized V+V sites, and this is in complete agreement with the theoretical predictions.

Open Access version available at UGent repository

A study of the effect of electron donating and electron withdrawing groups on the catalytic performance of V-MIL-47

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Conference / event / venue 

XIIth Netherlands' Catalysis and Chemistry Conference (NCCC XII)
Noordwijkerhout, The Netherlands
Monday, 28 February, 2011 to Wednesday, 2 March, 2011
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