Ozone from Iron(III) Porphyrin, Nitrite Ion, and Oxyge

摘要

Ozone is well known as an extremely powerful oxidant. Its decomposition to oxygen proceeds with the release of 143 kJ/mol, and it reacts with a broad range of inorganic and organic structural types. It is formed in the atmosphere by the photolysis ofO_2 and NO_2. The resulting oxygen atoms combine with O_2 to produce O_3. The combination of certain peroxy radicals may also result in O_3. In addition to photolysis, ozone can be synthesized from dioxygen by electrolysis, electrical discharge, ionizingradiation, and UHF fields. The actual chemistry of these processes is complex and not fully understood. In contrast, the chemical generation of ozone is rare. However, small quantities have been reported to occur upon the addition of hydrogen peroxide to selenic acid, the decomposition of potassium peroxydisulfate by acid, the reaction of fluorine with aqueous KOH, and the oxidation of thin films of aluminum. Presumably oxygen atoms are generated to some extent in these reactions.