5-(4-ニトロフェニルアゾ)-7-(4-エチル-1-メチルオクチル)-8-キノリノールによる亜鉛(II)の自己付加錯体抽出とその溶媒効果

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タイトル別名
  • Solvent effect on the self-adduct extraction of zinc (II) with 5-(4-nitrophenylazo)-7-(4-ethyl-1-methyloctyl)-8-quinolinol.
  • ５‐（４‐ニトロフェニルアゾ）‐７‐（４‐エチル‐１‐メチルオクチル）‐８‐キノリノールによる亜鉛（ＩＩ）の自己付加錯体抽出とその溶媒効果
  • 5 4 ニトロフェニルアゾ 7 4 エチル 1 メチルオクチル 8 キノリノー

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抄録

The extraction of zinc(II) with 5-(4-nitrophenylazo)-7-(4-ethyl-l-methyloctyl)-8-quinolinol(HNEQ) was investigated using chloroform, 1, 2-dichloroethane, isobutylmethyl ketone (MIBK), and 1-octanol as diluents. HNEQ exhibited a higher extractability toward zinc(II) than did 8-quinolinol and Kelex 100. The extractability of zinc(II) with HNEQ increased in the following order of chloroform < 1, 2-dichloroethane < MIBK < 1-octanol. The extraction constants Kex, n = [Zn(NEQ)2(HNEQ)n]org[H+]2/[Zn2+][HNEQ](2+n)org and the formation constants (βs, n= [Zn(NEQ)2(HNEQ)n]org/[Zn(NEQ)2]org [HNEQ]norg) of the self-adduct complexes [Zn(NEQ)2(HNEQ)n] in the organic solvents were dependent on the characteristics of the organic solvents. MIBK and 1-octanol provided larger formation constant of the self-adduct complex than did chloroform and 1, 2-dichloroethane. This may be ascribed to the coordination of MIBK or 1-octanol to the Zn(II)HNEQ complex and/or to the hydration of Zn(II)-HNEQ complex with MIBK or 1-octanol. It was also found that Zn(II)-HNEQ strongly absorbs at 522 nm (λmax=8.40 × 104 cm-1mol-11, chloroform) and 543 nm (λmax=8.40 × 104 cm-1 mol-11, 1-octanol).

収録刊行物

  • 分析化学

    分析化学 47 (2), 101-107, 1998

    公益社団法人 日本分析化学会

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