Induced photolysis of DDT.
Photolysis of mixtures of certain alkyl halides and aromatic amines produces dehalogenation of the halide. These reactions involve a photoinduced charge transfer from the amine to the halide. Photolysis of tritolylamine and carbon tetrachloride produces tritolylaminium chloride. Photolysis of 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and diethylaniline at 3100 angstroms yields 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE), 1,1-dichloro-2,2-bis(p-chlorophenyl)ethane (DDD), p,p'-dichlorobenzophenone (DDCO), and hydrogen chloride. Photolysis of DDT does not occur unless an inducer which has a low ionization potential, such as diethylaniline, is present. The DDT-diethylaniline mixture is stable in the dark, and the induced photolysis is not affected by triplet quenchers.
D000588:Amines; D000814:Aniline Compounds / Q000528:radiation effects; D001577:Benzophenones; D003634:DDT / Q000528:radiation effects*; D003632:Dichlorodiphenyldichloroethane; D004735:Energy Transfer; D005609:Free Radicals; D006846:Hydrocarbons, Halogenated; D006851:Hydrochloric Acid; D008027:Light; D011854:Radiochemistry
D000588:Amines; D000814:Aniline Compounds; D001577:Benzophenones; D005609:Free Radicals; D006846:Hydrocarbons, Halogenated; D003634:DDT; D006851:Hydrochloric Acid; D003632:Dichlorodiphenyldichloroethane