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This work reports on the capability of the O2-activated Cu-ZSM-5 and Cu-MOR zeolites to selectively convert methane into methanol at a temperature of 398 K. A strong correlation between (i) the activity and (ii) the intensity of the 22 700 cm-1 UV-vis band, assigned to the bis(mu-oxo)dicopper core, is found (i) as a function of the reaction temperature,(More)
Driven by the depletion of crude oil, the direct oxidation of methane to methanol has been of considerable interest. Promising low-temperature activity of an oxygen-activated zeolite, Cu-ZSM-5, has recently been reported in this selective oxidation and the active site in this reaction correlates with an absorption feature at 22,700 cm(-1). In the present(More)
Following its widespread use in biomedical research, fluorescence microscopy has recently been introduced in the catalysis field to study chemocatalytic processes with a high spatiotemporal resolution, a unique sensitivity down to the single molecule level and this under in situ conditions. This tutorial review is structured around the length scales that(More)
[*] Prof. B. F. Sels, G. De Cremer, E. Bartholomeeusen, Prof. D. E. De Vos Department of Microbial and Molecular Systems Katholieke Universiteit Leuven Kasteelpark Arenberg 23, B-3001 Leuven (Belgium) E-mail: bert.sels@biw.kuleuven.be Dr. T. Vosch, Dr. J.-I. Hotta, Dr. M. B. J. Roeffaers, E. Coutiño-Gonzalez, Prof. J. Hofkens Department of Chemistry,(More)
Catalytic processes on surfaces have long been studied by probing model reactions on single-crystal metal surfaces under high vacuum conditions. Yet the vast majority of industrial heterogeneous catalysis occurs at ambient or elevated pressures using complex materials with crystal faces, edges and defects differing in their catalytic activity. Clearly, if(More)
BACKGROUND Probiotic bacteria are increasingly used as immunomodulatory agents. Yet detailed molecular knowledge on the immunomodulatory molecules of these bacteria is lagging behind. Lipoteichoic acid (LTA) is considered a major microbe-associated molecular pattern (MAMP) of Gram-positive bacteria. However, many details and quantitative data on its immune(More)
Metal-organic frameworks (MOFs) are a class of crystalline materials that consist of metal ions and organic ligands linked together by coordination bonds. Because of their porosity and the possibility of combining large surface areas with pore characteristics that can be tailored, these solids show great promise for a wide range of applications. Although(More)