Synthesis of bis(amidoxime)s and evaluation of their properties as uranyl-complexing agents
作者:Jérémy Stemper、Wei Tuo、Eva Mazarío、Ahmed S. Helal、Alexandre Djurovic、Claude Lion、Jean-Michel El Hage Chahine、François Maurel、Miryana Hémadi、Thierry Le Gall
DOI:10.1016/j.tet.2018.04.016
日期:2018.5
cations efficiently. To this end, various bis(amidoxime)s were synthesized by reaction of hydroxylamine with the corresponding dinitriles. In these compounds the amidoximes are separated by chains of various lengths, some including a heterocycle (pyridine or 1,3,5-triazine). The abilities of these bis(amidoxime)s to complex uranyl cation in water were evaluated by determining their affinity constants
铀污染涉及高毒性和放射性,因此对人类健康和环境构成严重威胁。螯合是螯合铀的有效方法。众所周知,基于肟基的螯合剂能够有效地络合铀酰阳离子。为此,通过羟胺与相应的二腈反应合成了各种双(ami胺肟)。在这些化合物中,a胺肟被各种长度的链隔开,有些长度包括杂环(吡啶或1,3,5-三嗪)。通过等温滴定热量法(ITC)测定它们的亲和常数和热力学参数,评估了这些双(ami胺肟)在水中复合铀酰阳离子的能力。还进行了DFT计算,确定在铀酰阳离子和肟酸基团之间形成的配合物的最佳结构。在这项工作中也合成的四(ami胺肟)对铀显示出良好的亲和力,并且一个分子能够螯合几个铀酰阳离子。这些结果对铀污染废水的修复具有重要意义,并为设计和合成新型a胺肟化合物开辟了一些前景。