Towards understanding the correlation between UO_2^(2+) extraction and substitute groups in 2,9-diamide-1,10-phenanthroline

作     者：Xinrui Zhang Liyong Yuan Zhifang Chai Weiqun Shi 

作者机构：Laboratory of Nuclear Energy Chemistry Institute of High Energy Physics Chinese Academy of Sciences School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2018年第61卷第10期

页      面：1285-1292页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (21471153, 21777161, 21477130, 21790373) the Youth Innovation Promotion Association, Chinese Academy of Sciences and the Science Challenge Project (JCKY2016212A504) 

主　　题：2,9-diamide-1,10-phenanthroline UO2^2+ extraction UV-Vis titration EXAFS 

摘      要：2,9-Diamide-1,10-phenanthroline(DAPhen)ligands represent a new family of tetradentate extractants given their strong affinity to actinides and the CHON *** this family,N,N′-diethyl-N,N′-ditolyl-2,9-diamide-1,10-phenanthroline(Et-TolDAPhen),initially reported by us,exhibits excellent selectivity towards actinides(U,Th,Am,Pu)over lanthanides and thus can be potentially applied in the group actinide extraction(GANEX)process for the group separation of *** this article,by tailoring the lengths of alkyl chains,we synthesized other four DAPhen ligands with different substitute groups in the diamide moieties,and characterized the relationship between properties and substitute groups of DAPhen *** extraction results show that three of the ligands exhibit high performance in UO_2^(2+)extraction from an acidic solution and the extracted UO_2^(2+)can be easily stripped by only using ultrapure *** titration confirms that UO_2^(2+)combined with all the four ligands in 1:1 *** extended X-ray absorption finestructure(EXAFS)study shows that six donor atoms comprise the first equatorial shell of the UO_2^(2+)ions bonded by the DAPhen ligands,among which two nitrogen and two oxygen atoms are from the DAPhen ligand,while other two oxygen atoms are from one nitrate *** article promises to provide basic data for assessing the feasibility of this kind of DAPhen ligands applied in actinides separation from nuclear wastes.