Yield of Ions and Excited States Produced in the Radiolysis of Polar Organic Liquids

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Abstract
The yield of ions and triplet excited states produced in the radiolysis of polar protic and aprotic organic liquids was studied using the technique of pulse radiolysis. Anthracene and naphthalene were used to determine the yield of electrons and triplet excited states, respectively. Taking ε max = 9.9 × 10 3 M −1 · cm −1 for (anthracene)−, the yields of anthracene anions, considered to represent the yield of free ions produced, were found to vary from G values 0.1 to ∼ 2.6 for the 20 organic liquids examined. The yields of triplet states were found to depend, in a number of cases, upon the presence of electron scavengers in the liquids. The liquids studied include p‐dioxane, MTHF, pyridine, aliphatic alcohols, acetone, benzonitrile,acetonitrile, dimethylsulfoxide, 1,2‐propanediol carbonate, dimethylformamide, dimethylacetamide, and N‐methylpropionamide. The static dielectric constant values of these liquids ranged from ∼ 2.0 to 165.0. These results are evaluated and discussed, and the potential interest of some of these liquids is indicated.

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