Solids with cavities and channels (porous solids) have many uses, particularly as catalysts and absorbents. This chapter looks at the structure, synthesis, and use of several classes of micro- and mesoporous solids. Naturally occurring zeolites have been known for centuries, but many artificial zeolites have been prepared and are widely used in industry. Metal-organic frameworks (MOFs) are formed from metal ions or clusters linked by organic ligands. Covalent organic frameworks (COFs) are a recent development. These have the advantages of lighter mass and the stability provided by covalent bonds. Other types of porous solids—mesoporous aluminosilicates and organosilicas and clays are touched upon.
P. SchneiderPavol HudecOlga Šolcová