Abstract
Reactions of 18O2 with self-assembled monolayer films of thiolated DNA oligomers are studied by the electron stimulated desorption of anions. Electrons with energies < 20 eV initiate dehydrogenation of the DNA by resonant and non-resonant processes, to form radical sites for oxygenation. This damage mechanism may underlie the ‘‘oxygen fixation’’ process of radiobiology.
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