Journal of the Brazilian Chemical Society
On-line version ISSN 1678-4790
NAKAGAKI, Shirley et al. Catalytic activity in oxidation reactions of anionic iron(III) porphyrins immobilized on raw and grafted chrysotile. J. Braz. Chem. Soc. [online]. 2006, vol.17, n.8, pp. 1672-1678. ISSN 1678-4790. http://dx.doi.org/10.1590/S0103-50532006000800027.
Natural and grafted chrysotile were used as matrices for the immobilization of second generation iron porphyrins. The catalysts obtained were evaluated in the oxidation reaction of cyclohexane, using iodosylbenzene as oxidant agent. The catalyst activity for different conditions was compared with results for the same porphyrins immobilized with 3-APTS grafted disordered silica, obtained from acid-leached chrysotile. Preliminary results have shown that high activity can be obtained with short reaction times, and that the reaction is specific for alcohol.
Keywords : iron porphyrin; supported catalysts; chrysotile; grafting; oxidation; catalysis.