Here are a few examples illustrating the control over catalytic properties:
1. Zeolites: These microporous materials have well-defined structures that can be tailored to enhance selectivity for specific reactions. 2. Enzyme Catalysis: Enzymes are biological catalysts with highly specific active sites, and their properties can be modified through genetic engineering. 3. Homogeneous Catalysis: Transition metal complexes in solution can be designed with ligands that precisely control their reactivity and selectivity.