Association of Keggin-type anions with cationic meso-substituted porphyrins: synthesis, characterization and oxidative catalytic studies

The preparation, characterization and catalytic application of new organic/inorganic hybrids with polyoxometalates and cationic porphyrins or metalloporphyrins are described. At 60 °C, some of the new compounds catalysed the epoxidation with H2O2 of cis-cyclooctene, geraniol and (+)-3-carene with higher conversions than the corresponding metalloporphyrins alone. The polyoxometalates contributed, in general, to the stabilization of the metalloporphyrins in catalytic conditions.