Radiation-induced chain reactions in alcohol solutions of diphenyliodonium salts: a high-sensitivity chemical dosimeter |
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Authors: | Koizumi Hitoshi Sasaki Toshimitsu Ichikawa Tsuneki |
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Affiliation: | Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Kita-ku, Sapporo 060-8628, Japan. koizumih@eng.hokudai.ac.jp |
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Abstract: | Chain reactions in gamma-irradiated 2-propanol solutions of diphenyliodonium salts have been studied. Protonic acids were generated in the irradiated solutions with high yields, whereas acid formation as a result of thermal reactions was negligible. The solution can be used as a high-sensitivity chemical dosimeter. The G value of acidic protons increases with increasing concentration of diphenyliodonium salt at the lower concentrations because the reaction rate of a propagation reaction increases. However, the chain is limited by a termination reaction between phenyl radical and the iodonium salt: The G value shows a maximum value of 610 micromol J(-1) at the concentration of 0.08 mol dm(-3) and decreases at higher salt concentrations. |
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