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1976 (1)
1Author    W. A. Prütz, S. VogelRequires cookie*
 Title    Specific Rate Constants of Hydroxyl Radical and Hydrated Electron Reactions Determined by the RCL Method  
 Abstract    Relative rate constants of OH radical and eaq~ reactions have been determined by comparing, under steady x-irradiation, the effect of various solutes upon the radiation-induced chemiluminescence (RCL) of aqueous dye (DH) solutions, [DH + -OH] + eaq --> DH* + OH -. The results abundantly confirm other published data. RCL changes upon addition of phosphates indicate prototropic reactions with the oxidized dye, D'-f^PO^ ^ DH-+ + HPO4 2-, promoting or inhibiting the formation of semioxidized dye (DH-+) as the most efficient RCL precursor. The RCL enhancement commonly observed upon addition of halides and pseudo halides is discussed at some length on the base of previous and present results in order to focus attention to the possible correlation between such RCL enhancement and the effect of halogen-sensitization in radiobiology. RCL results suggest that the halide transients formed from OH radicals, X -+ -OH X 1 -f OH -, are very powerful oxidizing agents reacting with aromatics by electron-abstraction rather than by addition or H-abstraction. The common application of I -and SCN -as competitors for the estimation of OH radical reactivities is being commented in the context. 
  Reference    (Z. Naturforsch. 31b, 1501—1510 [1976]; received July 12 1976) 
  Published    1976 
  Keywords    Hydrated Electron, Hydroxyl Radical, Luminescence, Radiation Chemistry, Rate Constants 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1501.pdf 
 Identifier    ZNB-1976-31b-1501 
 Volume    31