Synergistic extraction of vanadium(V,IV) with dithizone.
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概要
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By employing the synergistic extraction technique, vanadium (V,IV) has been found to form the primary dithizonate in the presence of a synergist. The extraction of the element proceeds according to the following equations.<BR>VO<SUB>2</SUB><SUP>+</SUP>+H<SUB>2</SUB>dz,<SUB>org</SUB>+TBPO<SUB>org</SUB>\rightleftharpoonsVO<SUB>2</SUB>(Hdz)(TBPO)<SUB>Org</SUB>+H<SUP>+</SUP>,<BR>and<BR>VOOH<SUP>+</SUP>+H<SUB>2</SUB>dz,<SUB>org</SUB>\rightleftharpoonsTOPO<SUB>org</SUB>\rightleftharpoonsVOOH(Hdz)(TOPO)<SUB>org</SUB>+H<SUP>+</SUP>,<BR>where H<SUB>2</SUB>dz, TBPO, and TOPO denote dithizone, tributylphosphine oxide and trioctylphosphine oxide, respectively, and the subscript org indicates the benzene phase. The resulting adduct VO<SUB>2</SUB>(Hdz)(TBPO) has an absorption maximum at 503 nm and is stable for at least 1 h. However, the red color of VOOH(Hdz)(TOPO) in benzene fades away during the standing time, probably due to the dimerization of the initially extracted monomeric species.
- 公益社団法人 日本化学会の論文
著者
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Akaiwa Hideo
Department Of Applied Chemistry Faculty Of Engineering Gunma University
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Hiyamuta Etsuo
Department Of Applied Chemistry Faculty Of Technology Gunma University
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Kawamoto Hiroshi
Department Of Applied Chemistry Faculty Of Engineering Gunma University
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Hiyamuta Etsuo
Department of Chemistry, Faculty of Technology, Gunma University
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