The Estimation of the Surface Properties of Metal Oxides by the Use of TCNQ Adsorption
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概要
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The electron-donor properties of metal oxides (magnesia, alumina, silica, titania, zinc oxide, and nickel oxide) were investigated by means of TCNQ adsorption. When TCNQ was adsorbed on the surfaces of the metal oxides from its acetonitrile solution, the surfaces of the metal oxides acquired the colorations characteristic of each oxide. The coloration was caused by the formation of TCNQ anion radicals on the metal oxide surfaces. The presence of the TCNQ anion radicals on the colored metal oxide surfaces was confirmed by studying the ESR absorption and electronic spectra. The radicals were formed as a result of electron transfer to TCNQ from the metal oxide surfaces. The order of the radical-forming activity, determined by ESR, was as follows: magnesia>zinc oxide>alumina>titania>silica>nickel oxide. The electron-donor property of the metal oxide surfaces might be dependent on the natures of the semiconductor and the surface hydroxyl ion.
- 公益社団法人 日本化学会の論文
著者
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Hosaka Hiroshi
Department Of Environmental Studies Graduate School Of Frontier Sciences The University Of Tokyo
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Fujiwara Takao
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Meguro Kenjiro
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Meguro Kenjiro
Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo
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Hosaka Hiroshi
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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