Tuning the solubilities of bis-triazinylphenanthroline ligands (BTPhens) and their complexes
Tuning the solubilities of bis-triazinylphenanthroline ligands (BTPhens) and their complexes
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DOI：
10.3987/com-12-s(n)102
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发表时间：
2012-10
期刊：
影响因子：
0.6
通讯作者：
Dominic M. Laventine;A. Afsar;M. Hudson;Laurence M. Harwood
中科院分区：
文献类型：
--
作者：
Dominic M. Laventine;A. Afsar;M. Hudson;Laurence M. Harwood
通过对三嗪取代基的修饰，合成了一系列双三嗪基邻菲咯啉配体（BTPhens）。结果发现，改变这些取代基改变了在一些非极性溶剂中的配体的溶解度。因此，C5-BTPhen在辛醇中显示出比C1-BTPhen显著更高的溶解度。利用C5-BTPhen及其络合物的高溶解度来促进NMR滴定实验。这些实验表明，即使在高Ln浓度下，溶液中的主要物质也是1：2络合物[Ln（III）（BTPhen）2]，并且2：1至1：1 BTPhen-Ln络合物的相对稳定性随不同镧系元素而变化。因此，C5-BTPhen对于单程选择性锕系元素分离方法显示出相当大的前景。
A series of bis-triazinylphenanthroline ligands (BTPhens) was synthesized by modifying the triazine substituents. It was found that varying these substituents altered the solubilities of the ligands in a number of non-polar solvents. Thus C5-BTPhen showed significantly higher solubility in octanol than C1-BTPhen. The high solubility of C5-BTPhen and its complexes was exploited to facilitate the NMR titration experiments. These experiments shown that the dominant species in solution were the 1:2 complexes [Ln(III)(BTPhen)2], even at high Ln concentrations, and that the relative stability of the 2:1 to 1:1 BTPhen-Ln complexes varied with different lanthanides. C5-BTPhen therefore shows considerable promise for a once-through selective actinide separation process.