Studies on electronic spectrum and electron spin resonance of vanadium(IV) complexes with organophosphorus compounds and high molecular weight amines.
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概要
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In the extraction of vanadium(IV) from aqueous solutions containing hydrochloric acid and/or a mixture of hydrochloric acid and lithium chloride by bis(2-ethylhexyl) hydrogenphosphate (DEHPA; HX), trioctylmethylammonium chloride (Aliquat-336), trioctylamine (TOA), trioctylphosphine oxide (TOPO) and tributyl phosphate (TBP), the complexes formed in the organic phases have been examined by spectrophotometry and electron spin resonance spectroscopy. It is found that in the extraction by DEHPA, the vanadium in the organic phase exists as the monomeric species, VO(X<SUB>2</SUB>H)<SUB>2</SUB>, or the polymeric one, (VOX<SUB>2</SUB>)<I><SUB>n</SUB></I>, and that in the extractions by Aliquat-336, TOA, TOPO, and TBP, tetravalent vanadium complexes are stable in the organic phases extracted from a mixed solution of hydrochloric acid and lithium chloride, while complexes containing pentavalent vanadium and VOV<SUP>4+</SUP> ions are formed in the organic phases extracted from hydrochloric acid solutions.
- 公益社団法人 日本化学会の論文
著者
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Nakamura Takato
Department Of Applied Chemistry And Materials Technology Faculty Of Engineering Shizuoka University
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Sato Taichi
Department Of Intelligent Mechanical Engineering College Of Science And Engineering Tokyo Denki Univ
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Nakamura Takato
Department of Applied Chemistry, Faculty of Engineering, Shizuoka University
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- Studies on electronic spectrum and electron spin resonance of vanadium(IV) complexes with organophosphorus compounds and high molecular weight amines.