High-Resolution Single-Turnover Mapping Reveals Intraparticle Diffusion Limitation in Ti-MCM-41-Catalyzed Epoxidation


  • G.D.C., P.D., and M.B.J.R. thank the FWO (Fonds voor Wetenschappelijk Onderzoek) for two doctoral fellowships and a postdoctoral fellowship, respectively. This work was performed within the framework of the IAP-VI program “Supramolecular Chemistry and Catalysis” of the Belgian Federal government and of GOA-2/01. We also gratefully acknowledge financial support from a long-term structural funding “Methusalem” by the Flemish government and from K.U. Leuven in the framework of the Centre of Excellence CECAT.


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Shedding light on catalysis: For the first time, transport phenomena and their influence on catalysis are directly observed for individual catalytic particles by single-turnover mapping using high-resolution fluorescence microscopy. The Thiele modulus could be measured with just one experiment, proving the existence of diffusional limitations for the Ti-MCM-41 catalyzed epoxidation of a fluorescent reporter molecule (see picture; TBHP=tert-butylhydroperoxide).