Oxidation of 2,4,6-trichlorophenol catalyzed by iron phthalocyanines covalently bound to silica

The covalent attachment of an iron phthalocyanine with chlorosulfonyl subst ituents (FeBcSO(2)Cl) onto a functionalized 3-aminopropyl-silica has been a chieved. This supported catalyst FePcSO2C1-silica is able to degrade a reca lcitrant pollutant like 2,4,6-trichlorophenol (TCP) with hydrogen peroxide as oxidant. In order to improve the catalytic efficiency of the grafted iro n phthalocyanine complex, modifications of the macrocycle substituents, pas sivation of the silica surface, variation of the loading of the carrier and addition of an organic cosolvent to the reaction mixture were carried out. (C) Academie des sciences/Elsevier, Paris.