phosphomolybdates

Phosphomolybdates are a class of complex inorganic compounds containing phosphorus and molybdenum. They are also known as phosphomolybdic acids or their salts. These polyoxometalates are characterized by their ability to form a wide variety of structures, often depending on the ratio of molybdenum to phosphorus and the presence of other cations. A common and well-known example is the 12-molybdophosphate anion, [PMo12O40]3-, which exists in various hydrated forms. These compounds are typically yellow or greenish-yellow solids and are soluble in water and polar organic solvents.

Phosphomolybdates find applications in several areas. They are used as catalysts in organic synthesis, particularly in oxidation reactions and in the production of fine chemicals. Their ability to undergo redox reactions makes them suitable for electrochemical applications. In analytical chemistry, phosphomolybdates are employed as reagents for the determination of various substances, such as silicon and phosphorus. They have also been investigated for their potential use in areas like corrosion inhibition and as components in advanced materials. The synthesis of phosphomolybdates often involves the reaction of molybdic acid or molybdenum trioxide with phosphoric acid under acidic conditions.