High-Resolution Single-Turnover Mapping Reveals Intraparticle Diffusion Limitation in Ti-MCM-41-Catalyzed Epoxidation (pages 908–911)
Gert De Cremer, Maarten B. J. Roeffaers, Evelyne Bartholomeeusen, Kaifeng Lin, Peter Dedecker, Paolo P. Pescarmona, Pierre A. Jacobs, Dirk E. De Vos, Johan Hofkens and Bert F. Sels
Version of Record online: 22 DEC 2009 | DOI: 10.1002/anie.200905039
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).