Production
Various methods for the production of singlet oxygen exists. A photochemical chemical method involves the irradiation of normal oxygen gas in the presence of an organic dye as a sensitizer, such as rose bengal, methylene blue or porphyrins. Singlet oxygen can also be produced chemically. One of the chemical methods is by the decomposition of hydrogen trioxide, or to react hydrogen peroxide with sodium hypochlorite, which is convenient in school laboratories for demonstrative purposes:
- H2O2 + NaOCl → O2(1Δg) + NaCl + H2O
Another method is via phosphite ozonides, which in turn is generated in situ. The phosphite ozonide is then catalytically decomposed by pyridine at low temperature to give singlet oxygen:
The advantage of this method is that the reaction can be cyclic, which the resulting phosphate ester is reduced to the phosphite ester for further production of singlet oxygen.
Read more about this topic: Singlet Oxygen
Famous quotes containing the word production:
“The heart of man ever finds a constant succession of passions, so that the destroying and pulling down of one proves generally to be nothing else but the production and the setting up of another.”
—François, Duc De La Rochefoucauld (1613–1680)
“To expect to increase prices and then to maintain them at a higher level by means of a plan which must of necessity increase production while decreasing consumption is to fly in the face of an economic law as well established as any law of nature.”
—Calvin Coolidge (1872–1933)
“By bourgeoisie is meant the class of modern capitalists, owners of the means of social production and employers of wage labor. By proletariat, the class of modern wage laborers who, having no means of production of their own, are reduced to selling their labor power in order to live.”
—Friedrich Engels (1820–1895)