可完全焚烧二酰胺荚醚能从硝酸介质中有效共萃取镧系和锕系离子，极有希望用于核工业高放废液处理。然而，即使目前公认最佳的酰胺荚醚TODGA由于存在萃取容量低，易出现三相的缺点，不得不使用大量相改性剂，使萃取体系变得复杂，这极大限制了其应用，因此对酰胺荚醚的结构进行改进十分必要！本项目拟通过采取醚链延伸链长的方式，合成系列一端酰胺N原子上含有长链取代基，另一端酰胺N原子上含有短链或结构较紧凑基团（如吡咯环、哌啶环、吗啉环）的新型二酰胺荚醚，并对其结构进行表征。系统研究配体的组成与结构对其萃取锕系、镧系以及过渡金属、碱金属与碱土金属离子等，在萃取能力、萃取容量、三相形成、抗辐照与耐水解稳定性等方面的影响，揭示组成、结构与性能之间的内在规律，并探究萃取机理。目标是为寻找无需使用相改性剂的有工业应用前景的从酸性高放废液中共萃取锕系和镧系的二酰胺荚醚体系，提供理论与实验依据。

The fully incinerable diamides pod-ether ligands can effectively coextract actinides and lanthanides from nitric acid medium, and hold great promise for treating high level liquid waste of nuclear industry. However, TODGA as the currently acknowledged best-performing diamides pod-ether ligand, has low extraction capacity, leading to the easy formation of the second organic phase. And a large amount of phase modifier has to be used, resulting in a complicated extraction system. This greatly limits its applications. Therefore, it is necessary to improve the structure of diamides pod-ether ligand. By means of the ether-chain extention, a series of diamides pod-ether ligands, which contain long chain substituents on the one amide nitrogen atom, and short chain or small substituents on the other amide nitrogen atom, will be synthesized and characterized. The influences of the composition and structure of the synthesized ligands on the extracting power, the extraction capacity, the formation of the second organic phase, and hydrolytic stability and resistance to irradiation will be systematically investigated for the extraction of actinides, lanthanides, transition metals, alkali metals and alkaline earths. Meanwhile, the relationships between the composition and structures, and extraction properties, as well as the extraction mechanism will also be explored. Through the execution of this project, the theoretical and experimental foundation can be obtained for the development of the extraction system with the industry application prospect for the co-extraction of actinides and lanthanides from acidic high level liquid waste.