Immobilization and catalytic properties of perfluorinated ruthenium phthalocyanine complexes in MCM-41-type molecular sieves

Ruthenium perfluorophthalocyanine complexes were immobilized in the channels of MCM-41-type molecular sieves using three different methods: (1) ship-in-the-bottle synthesis (in situ assembling of the metal complex from smaller moieties); (2) the synthesis method (addition of the preformed complex during synthesis of the molecular sieve); and (3) grafting the complex to the functionalized silica surface of MCM-41. The resulting host/guest compounds were characterized by X-ray powder diffraction, nitrogen adsorption and solid-state infrared and ultraviolet/visible spectroscopy, and tested as catalysts for the oxidation of n-hexane or cyclohexane under ambient conditions using tertiary-butylhydroperoxide as oxidant. Depending on the synthesis method, the materials obtained differ strongly in their composition (i.e., loading with complexes) and in their catalytic activities. (C) 1999 Elsevier Science B.V. All rights reserved.