A CRITICAL OVERVIEW OF THE CATALYTIC POTENTIAL OF ZEOLITE-SUPPORTED METAL-COMPLEXES

This paper reviews some important items for the design of new zeolite-metal complex supramolecules. After an overview of the synthesis methods for these systems, complexation reactions inside zeolites are discussed in detail. The last part is focused on the effects of encapsulation on the reactivity of the complexes. 1. Introduction 2. Methods for metal complex fixation in zeolites 2.1. Template synthesis 2.2. Cationic exchange of complexes 2.3. Adsorption and anchoring of complexes on dehydrated zeolites 2.4. Ligand synthesis inside the zeolite 2.5. Ligand adsorption from solution on metal ion exchanged zeolites 2.6. Adsorption of the pure ligand on metal ion exchanged zeolites 2.7. Mechanism of retention of the complexes 3. Complexation reactions inside zeolites 3.1. Complexation by monodentate ligands 3.2. Complexation by bi- and polydentate ligands 4. Effects of zeolites on the chemical reactivity of occluded metal complexes 4.1. Zeolite effects on oxygen activating Co(II) complexes 4.2. Zeolitic photophysics and photochemistry 4.3. Zeolite effects on chemical reactions 5. Conclusion