Formation of excited states and ions in the radiolysis of benzyl alcohol

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Abstract
Transient species in benzyl alcohol and solutions of benzyl alcohol were studied by means of the nanosecond pulse radiolysis technique. Neat benzyl alcohol gives a benzyl radical with G = 2.1 which is produced by dissociative electron attachment. In solutions of lithium iodide, I2− with a G = 2.1 is observed; however, the yield of the solvent cation measured by using t-stilbene is only 0.2. It is suggested that a radical BzCH2O resulting from an ion-molecule reaction of the primary solvent cations and solvent molecules is a probable precursor of I2−; therefore G = 2.1 refers to the cation yield. The yield for the excited singlet and triplet states, 0.70 ± 0.10 and 1.10 ± 0.10 were determined using solutes such as 1,1′-binaphthyl, 1,2-benzanthracene, pyrene, naphthalene, and benzophenone. The interplay of ionization and direct excitation in the formation of excited states are discussed.

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