Highly Effective Extraction of Iron(III) with 4-Isopropyltropolone in Nonpolar Solvents Containing 3,5-Dichlorophenol as a Synergist
Highly Effective Extraction of Iron(III) with 4-Isopropyltropolone in Nonpolar Solvents Containing 3,5-Dichlorophenol as a Synergist
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在含有 3,5-二氯苯酚作为增效剂的非极性溶剂中用 4-异丙基托酚酮高效萃取铁 (III)
DOI：
10.2116/analsci.16.1297
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发表时间：
2000
影响因子：
1.6
通讯作者：
K. Ohashi
中科院分区：
文献类型：
--
作者：
H. Imura;Ken;K. Ohashi
研究了3，5-二氯苯酚（DCP）对4-异丙基环庚三烯酚酮（Hipt）萃取铁（III）的影响，并建立了以庚烷和环己烷为非极性溶剂的高效协同萃取体系.正庚烷体系的平衡研究表明，不仅铁（Ⅲ）螯合物Fe（ipt）_3·nDCP（n = 1-3），而且试剂Hipt·nDCP（n = 1，2）都形成加合物。测定了相应配合物的形成常数（β M，n = [Fe（ipt）_3·nDCP]_org/[Fe（ipt）_3]_org[DCP]_org^n，β H，n = [Hipt·nDCP]_org/[Hipt]_org[DCP]_org^n），并与乙酰丙酮（Hacac）进行了比较。Fe（ipt）_3和Hipt的值分别大于Fe（acac）_3和Hacac，表明前者具有更高的氢键接受能力和碱性。
A great enhancement in the extraction of iron(III) with 4-isopropyltropolone (Hipt) has been observed upon the addition of 3,5-dichlorophenol (DCP) as a hydrogen-bond donor, and highly efficient synergistic extraction system for iron(III) was presented using nonpolar solvents such as heptane and cyclohexane. An equilibrium study of the heptane system has demonstrated the formation of the adduct complexes of not only the iron(III) chelate, Fe(ipt)_3· n DCP ( n = 1–3), but the reagent, Hipt· n DCP ( n = 1, 2). The formation constants ( β _M, n = [Fe(ipt)_3· n DCP]_org/[Fe(ipt)_3]_org[DCP]_org^n, β _H, n = [Hipt· n DCP]_org/[Hipt]_org[DCP]_org^n) of the corresponding complexes were determined and evaluated by comparing with those of acetylacetone (Hacac). The values obtained for Fe(ipt)_3 and Hipt were larger than those for Fe(acac)_3 and Hacac, respectively, suggesting the higher hydrogen-bond accepting power and basicity of the former ligand.