An evaluation of the potential of the Ship-in-Bottle approach for catalyst immobilization in microporous supports

摘要

Encapsulation is a unique catalyst immobilization technique as it does not require interaction between the host (support) and the guest (complex) and in principle allows to mimic the (catalytic) properties of homogeneous complexes. All other methods, such as covalent linking of the ligand with the substrate, might induce changes in the ultimately formed complex. The only prerequisite for successful encapsulation requires that the size of the complex should exceed that of the pores/cages of the support, precluding the leakage of the complex into solution in working conditions of the heterogenized catalyst. As a consequence, faujasitic-type zeolites have been the preferred hosts for encapsulation of complexes.