Polarographic Reductions of Some Alkali and Alkaline Earth Metal Ions in Dimethylacetamide. Effect of Cation of the Supporting Electrolyte
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概要
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Polarographic reductions of lithium, barium, strontium, and calcium ions in dimethylacetamide (DMA) have been examined in the supporting electrolytes of various kinds of tetraalkylammonium perchlorates. As having been observed in hexamethylphosphoramide, the reductions of these metal ions in DMA are influenced significantly by the cation of the supporting electrolyte. When the cation of the supporting electrolyte is small in size and easily adsorbed onto the negatively charged electrode surface, as in the case in Et<SUB>4</SUB>NClO<SUB>4</SUB>, the reductions of these metal ions are difficult and they either do not occur at all until the reduction of the supporting electrolyte itself or, if they occur, the limiting currents are small and controlled by some preceding processes. With the increase of the cationic size of the supporting electrolyte, the reductions become much easier. Thus, in Bu<SUB>4</SUB>NClO<SUB>4</SUB> and in Hex<SUB>4</SUB>NClO<SUB>4</SUB>, these metal ions are reduced almost reversibly. The effect of cation of the supporting electrolyte on the reduction of lithium ion has also been examined briefly in dimethylsulfoxide, dimethylformamide and propylenecarbonate.
- 公益社団法人 日本化学会の論文
著者
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Fujinaga Taitiro
Department Of Chemistry Faculty Of Science Kyoto University
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Izutsu Kosuke
Department Of Chemistry Faculty Of Science Shinshu University
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Sakura Sachiko
Department of Chemistry, Faculty of Science, Kyoto University
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