Electron Spin Resonance Studies of the Carbon Dioxide Anion Radical Adsorbed on X-Type Zeolites
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概要
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The hindered motion and the structure of the CO<SUB>2</SUB><SUP>−</SUP> radical adsorbed on various zeolites were investigated by means of ESR spectroscopy. The adsorbed CO<SUB>2</SUB><SUP>−</SUP> radical was obtained by the γ-irradiation of zeolites with carbon dioxide labeled with <SUP>13</SUP>C. The results show that the interaction of the CO<SUB>2</SUB><SUP>−</SUP> radical with the zeolite surface changes with the electrostatic field on the surface. The motion and the structure of the adsorbed CO<SUB>2</SUB><SUP>−</SUP> radical are affected by the properties of the zeolite surfaces; the former is also influenced by the extent of exchange of the cation on zeolite, regardless of the time of irradiation, before or after the introduction of carbon dioxide. The formation of the CO<SUB>2</SUB><SUP>−</SUP> radical on zeolites was interpreted on the basis of such a mechanism that electrons are initially trapped by the surface of zeolite upon the irradiation and then transferred to carbon dioxide molecules. The results also show that the process of the electron transfer depends on the kind of cation.
- 公益社団法人 日本化学会の論文
著者
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Sogabe Kunihisa
Department Of Chemistry Faculty Of Education Shimane University
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Hasegawa Akinori
Department Of Chemistry Kogakkanuniversity
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Yamada Yoshio
Department Of Agricultural Chemistry Faculty Of Agriculture
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Miura Masaji
Department of Chemistry, Faculty of Science, Hiroshima University
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