title: Radiation-induced chain reactions in alcohol solutions of diphenyliodonium salts: a high-sensitivity chemical dosimeter.
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.
authors.affiliation: Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Kita-ku, Sapporo 060-8628, Japan. koizumih@eng.hokudai.ac.jp
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Koizumi
authors.forename: Toshimitsu
authors.initials: T
authors.lastname: Sasaki
authors.forename: Tsuneki
authors.initials: T
authors.lastname: Ichikawa
mesh_terms: D019840:2-Propanol / Q000528:radiation effects*; D001713:Biphenyl Compounds / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D005720:Gamma Rays; D009861:Onium Compounds / Q000528:radiation effects*; D011834:Radiation Monitoring / Q000379:methods*; D012680:Sensitivity and Specificity; D012996:Solutions; D013816:Thermodynamics
chemical_list: D001713:Biphenyl Compounds; D009861:Onium Compounds; D012996:Solutions; C031291:diphenyliodonium; D019840:2-Propanol