PRECURSORS OF PHENOLS PRODUCED IN THE gamma -RADIOLYSIS OF AROMATIC HYDROCARBONS IN LIQUID CARBON DIOXIDE.

Article abstract of DOI:10.1246/bcsj.54.362

The gamma -ray-induced oxidation of toluene in liquid carbon dioxide has been reinvestigated. In order to discuss the precursors of the main products: three kinds of cresols and benzyl alcohol, 1-butene was used as the scavenger of oxygen atoms. The formation of cresols and benzyl alcohol was well explained by the participation of two precursors: one is oxygen atoms and the other is ionic species, O minus or/and CO//3** minus ions. The ratio of the G-value of oxygen atoms to that of the sum of O** minus and CO//3** minus ions initially formed was estimated to be 4:1 for pure liquid carbon dioxide. The spur model previously proposed was applied to explain the formation of O** minus and CO//3** minus ions.