Characterization of Iron(III) Tetramesitylporphyrin and Microperoxidase-8 Incorporated into the Molecular Sieve MCM-41

The hydroxylation of aniline with H2O2 as the oxidant has been utilized to probe the catalytic activity of the water-insoluble model porphyrin in a water-soluble MCM-41 system and to investigate the catalytic activity and operational stability of microperoxidase-8 upon its incorporation into MCM-41. Our results demonstrate that metalloporphyrins supported on MCM-41 can catalyze cytochrome P450-like reactions in aqueous solutions but point out limitations in the use of MCM-41 as a solid support for heterogeneous catalysts.