Effect of alkyl substitueras in hydrophobic 8-quinolinol on the extraction of gallium(III) and applications to the separation of gallium(III) from aluminum(III).
Effect of alkyl substitueras in hydrophobic 8-quinolinol on the extraction of gallium(III) and applications to the separation of gallium(III) from aluminum(III).
复制标题
疏水性 8-羟基喹啉中的烷基取代基对镓 (III) 萃取的影响及其在镓 (III) 与铝 (III) 分离中的应用。
DOI：
10.1016/0039-9140(96)01922-4
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发表时间：
1996
期刊：
影响因子：
6.1
通讯作者：
H. Sugihara
中科院分区：
文献类型：
--
作者：
K. Ohashi;R. Iwata;S. Mochizuki;H. Imura;K. Hiratani;H. Sugihara
研究了用新制备的8-羟基喹啉2位上有烷基取代基的5-烷氧基甲基-8-羟基喹啉衍生物萃取镓(III)。 Ga(III)-5-辛氧基甲基-8-羟基喹啉 (HO8Q)、Ga(III)-2-甲基-5-辛氧基甲基-8-羟基喹啉 (HMO8Q)、Ga(III)-2-甲基-5-己氧基甲基-8-羟基喹啉 (HM-O6Q) 和 Ga(HI)-2-正丁基-5-己氧基甲基-8-羟基喹啉 (HNBO6Q)从高氯酸介质中在庚烷中萃取的络合物分别为Ga(O8Q)3、Ga(OH)(H2O)(MO8Q)2、Ga(OH)(H2O)(MO6Q)2和Ga(OH)H2O)(NBO6Q)2。 2-叔丁基-5-己氧基甲基-8-羟基喹啉没有表现出对镓(III)的任何反应性。 Ga(O8Q)3(Kex= [Ga(O8Q)3]org[H+]3/[Ga3+][HO8Q]org3)、Ga(OH)(H2O)(MO8Q)2(Kex= [Ga(OH)(H2O)(MO8Q)2]org[H+]3/[Ga3+][HMO8Q]org2) 的提取常数，从酸性溶液中用庚烷萃取的 Ga(OH)(H2O)2(MO6Q)2 和 Ga(OH)(H2O)(NBO6Q)2 在 I = 0.1 M 和25℃。在铝 (III) 存在下，HNBO6Q 对镓 (III) 表现出非常高的选择性。即使铝(III)比镓(III)过量100倍(1.43 × 10−5M)，镓(III)也被完全萃取，并且发现铝(III)的分配比小于2.0 × 10−3。
The extraction of gallium(III) with newly prepared 5-alkyloxymethyl-8-quinolinol derivatives with alkyl substituent at the 2-position in 8-quinolinol moiety has been studied. The Ga(III)-5-octyloxymethyl-8-quinolinol (HO8Q), Ga(III)-2-methyl-5-octyloxymethyl-8-quinolinol (HMO8Q), Ga(III)-2-methyl-5-hexyloxymethyl-8-quinolinol (HM-O6Q), and Ga(HI)-2-n-butyl-5-hexyloxymethyl-8-quinolinol (HNBO6Q) complexes extracted in heptane from a perchloric acid medium were Ga(O8Q)3, Ga(OH)(H2O)(MO8Q)2, Ga(OH)(H2O)(MO6Q)2and Ga(OH)H2O)(NBO6Q)2, respectively. The 2-tert-butyl-5-hexyloxymethyl-8-quinolinol did not exhibit any reactivity toward gallium(III). The extraction constants for Ga(O8Q)3(Kex= [Ga(O8Q)3]org[H+]3/[Ga3+][HO8Q]org3), Ga(OH)(H2O)(MO8Q)2(Kex= [Ga(OH) (H2O)(MO8Q)2]org[H+]3/[Ga3+][HMO8Q]org2), Ga(OH)(H2O)2(MO6Q)2and Ga(OH)(H2O)(NBO6Q)2, which were extracted in heptane from an acidic solution, are 103.21 ± 0.12, 10−4.24 ± 0.16, 10−3.84 ± 0.16and 10−4.07 ± 0.07, respectively at I = 0.1 M and 25 °C. HNBO6Q exhibited very high selectivity toward gallium(III) in the presence of aluminum(III). Even in the presence of a 100 fold excess of aluminum(III) to gallium(III) (1.43 × 10−5M), gallium(III) was completely extracted and the distribution ratio of aluminum(III) was found to be less than 2.0 × 10−3.