溶剂热和离子热法制备锕系元素有机膦酸盐晶体及其光谱表征

项目名称： 溶剂热和离子热法制备锕系元素有机膦酸盐晶体及其光谱表征

项目编号： No.21471107

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 化学工业

项目作者： 第五娟

作者单位： 苏州大学

项目金额： 85万元

中文摘要： 有机膦类萃取剂能够与有机溶剂或离子液体等稀释剂结合高效的从水相中选择性分离锕系元素，在核废料后处理中应用广泛。目前研究的一大热点在于如何进一步提高萃取效率，其中首要的工作就是要深入系统的了解萃取过程的机理。因此，本课题拟首次以溶剂热和离子热为手段制备锕系膦酸盐晶体，系统探讨溶剂、共存离子、配体构型和反应条件对配位环境和成键模式的影响，并以固态吸收光谱对结构进行表征，旨在从微观角度探索锕系元素与有机磷酸类萃取剂的结构构型，并与紫外可见近红外吸收光谱建立一一对应的联系，为改进和设计新型核废料萃取剂提供重要的理论基础。

中文关键词： 锕系元素；膦酸盐；晶体；结构；紫外可见吸收光谱

英文摘要： Phosphonates have played a critical role in nuclear industry primarily from the perspective of their application in separation process. They are able to selectively extract actinide ions from aqueous phase into organic solvent or ionic liquid. Now, most of the research have been focused on improving the extraction efficiency, yet the most critical part is the systematic understanding of the extraction mechanism. Thus, this project will utilize the organic solvent used in solvent extraction process as well as the newly developed ionic liquids, to synthesized actinide phosphonate crystals via solvothermal and ionothermal method for the first time. The crystals will be characterized by single-crystal/powder X-ray diffraction to get coordination environment and bonding mode information. The single crystal UV-vis-NIR absorption spectrum will be collected and related to each structure. By comparison of those structural features, the effects of solvent, coexist ions and reaction conditions will be discussed to further illustrate the interaction between actinide ions and phosphonate ligands to provide new aspects for improving nuclear waste processing technologies.

英文关键词： Actinide;Phosphonate;Crystal;Structure;UV-vis absorption spectrum