Calculated and measured transient product yields in pulse radiolysis of aqueous solutions: Concentration dependence |
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| Authors: | T. Pálfi L. Wojnárovits E. Takács |
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| Affiliation: | 1. Nesmeyanov Institute of the Organoelement Compounds RAS, Moscow, Russia;2. Institute of Molecular Biology and Genetics NASU, Kiev, Ukraine;1. Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México D.F. 04510, Mexico;2. Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carr. Toluca-Atlacomulco Km 14.5, Toluca, Estado de México 50200, Mexico;3. Facultad de Química, Universidad Autónoma del Estado de México, Paseo Tollocan y Colón, Toluca, Estado de México 50120, Mexico;1. University of Latvia, Institute of Chemical Physics, Kronvalda Boulevard 4, LV-1010 Riga, Latvia;2. Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-WPT), 76021 Karlsruhe, Germany;1. Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;2. Homi Bhabha National Institute, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;1. Biomedical Engineering, Vanderbilt University, Nashville, Tennessee;2. Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri |
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| Abstract: | Pulse radiolysis of aqueous solutions was modeled by using 54 equations for the reaction of water radiolysis intermediates with carefully selected rate coefficients. Yields of products formed in the hydrated electron+solute and hydroxyl radical+solute reactions were calculated and compared with the measured yields in wide concentration range. These reactions are in competition with the reactions of the water radiolysis intermediates with each other and with H2O, H+ and H2O2. An empirical equation was developed for the calculation of scavenged product yields that can be used in cases when due to low rate coefficient, low solubility or very high absorbance, low solute concentrations are applied and a considerable fraction of the water radiolysis intermediates does not react with the solute. |
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