Interfacial reaction in the synergistic extraction rate of Ni(II) with dithizone and 1,10-phenanthroline.
Interfacial reaction in the synergistic extraction rate of Ni(II) with dithizone and 1,10-phenanthroline.
复制标题
Ni(II)与双硫腙和1,10-菲咯啉协同萃取率中的界面反应。
DOI：
10.1016/0039-9140(95)01630-9
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发表时间：
1995
期刊：
影响因子：
6.1
通讯作者：
J. Murakami
中科院分区：
文献类型：
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作者：
H. Watarai;K. Sasaki;K. Takahashi;J. Murakami
采用高速搅拌-二极管阵列分光光度法研究了邻菲罗啉（phen）对双硫腙（HDz）萃取镍（II）的动力学协同效应。加合物NiDz 2 phen的初始萃取速率取决于HDz和phen的浓度，表明NiDzphen+的形成是速率控制步骤。当[HDz] < [phen]时，NiDz 2 phen的初始萃取与中间络合物的形成竞争，该中间络合物吸附在界面处，并且最可能归属于NiDzphen+2。在萃取的后期阶段，中间体络合物逐渐转化为NiDz 2 phen。测定了中间体的生成和消耗速率常数，讨论了协同萃取的动力学机理。
The kinetic synergistic effect of 1,10-phenanthroline (phen) on the extraction rate of Ni(II) with dithizone (HDz) into chloroform was studied by means of a high-speed stirring method combined with photodiode-array spectrophotometry. The initial extraction rate of the adduct complex NiDz2phen depended upon the concentrations of both HDz and phen, suggesting the formation of NiDzphen+as the rate-controlling step. When [HDz] < [phen], the initial extraction of NiDz2phen competed with the formation of an intermediate complex, which was adsorbed at the interface and assigned most probably to NiDzphen+2. The intermediate complex was gradually converted to NiDz2phen at a later stage of the extraction. The rate constants for the formation and consumption of the intermediate were determined, and the kinetic mechanism in the synergistic extraction was discussed.
H. Watarai：“铁 (II) 与 1,10-菲咯啉的离子缔合萃取动力学中的界面现象”。
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