Pulse radiolysis of aqueous diphenyloxide |
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| Institution: | 1. Institute of Nuclear Chemistry and Technology, ul. Dorodna 16, 03-195 Warsaw, Poland;2. Ludwig Boltzmann Institute for Radiation Chemistry and Radiation Biology, c/o The University of Vienna, Althanstrasse 14, UZA II, Ebene 5, Wien 1090, Austria;1. Research & Development Institute, High Performance Plastics Company, Sekisui Chemical Co., Ltd. 2-1 Hyakuyama, Shimamoto-Cho, Mishima-Gun, Osaka, 618-0021, Japan;2. Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu-Cho, Matsue, 690-8504, Japan;1. Czech Technical University in Prague, Faculty of Civil Engineering, Experimental Centre, Thákurova 7, 166 29 Prague 6, Czech Republic;2. Research Centre Rez, Hlavní 130, 250 68 Husinec-?e?, Czech Republic;3. Den-Service d’Etude du Comportement des Radionucléides (SECR), CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France;1. College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China;2. North China Electric Power Research Institute Co Ltd., Beijing, 100045, China |
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| Abstract: | Pulse radiolysis of aqueous diphenyloxide (DPO) has been performed under various experimental conditions. The OH radicals react with DPO on various positions of the molecule with a rate constant, k=2.1×1010 l mol?1 s?1. The major reaction step appears to be a cleavage of the C–O bond of DPO resulting into C6 H4OH (λ=285 nm) and C6H5O(λ=325 nm) radicals in addition to DPO–OH adducts. They disappear according to a second-order reaction. In the presence of air or in a gas mixture of N2O:O2=4:1 the DPO–OH adducts are scavenged by oxygen, resulting into peroxyl radicals, which are long-lived species. For the reaction of eaq? with DPO a rate constant, k=2×1010 l mol?1 s?1 was found. |
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