Electrochemical reduction of elemental sulfur in acetonitrile.
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概要
- 論文の詳細を見る
Electrochemical reduction of elemental sulfur (S<SUB>8</SUB>) has been carried out in acetonitrile using a platinum electrode. The products were identified by means of spectrophotometry and ESR. Sulfur is reduced voltammetrically in two steps:<BR>S_8+2e→S_8^2-, S_8^2-+2e→2S_4^2-<BR>These products turns into more stable species by the succeeding chemical reactions in a bulk solution as follows:<BR>2_8^2\oversetK\rightleftarrowsS_6^2-+1/4S_8& &(K=1.6×10^-2)<BR>_6^2-\oversetK_d\rightleftarrows2S_3^\newdot& &(K_d=1.2×10^-3) <BR>The S<SUB>4</SUB><SUP>2−</SUP> species was enough active to react with S<SUB>8</SUB> into S<SUB>8</SUB><SUP>2−</SUP>, which was regarded as the cause of a current maximum on the current-time curve in a controlled potential coulometry of S<SUB>8</SUB> at a potential of the second reduction step.
- 公益社団法人 日本化学会の論文
著者
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Okazaki Satoshi
Department Of Applied Chemistry Kyushu Institute Of Technology
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Fujinaga Taitiro
Department Of Chemistry Faculty Of Science Kyoto University
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Hojo Masashi
Department Of Chemistry Faculty Of Science Kochi University
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Kuwamoto Tooru
Department of Chemistry, Faculty of Science, Kyoto University
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