【作者】 邓巧； 王清贵； 夏传琴；

【Author】 DENG Qiao,WANG Qing-gui,XIA Chuan-qin (College of Chemistry,Sichuan University,Sichun of Chengdu Prov.610064,China)

【机构】 四川大学化学学院；

【摘要】 论文分别研究了含氮配体1,4,7,10-四对硝基苄基-1,4,7,10-四氮杂环十二烷（L）在不同pH,不同浓度的盐析剂（硝酸钠）,不同萃取剂浓度以及不同稀释剂下对钍的萃取效果,结果显示用二氯甲烷作稀释剂在pH=4.63,盐析剂浓度为1 mol/L的条件下对钍离子有很好的萃取效果,E%=94.90%;同时也考察了该化合物对UO₂²⁺、Th⁴⁺、La³⁺、Sm³⁺、Eu³⁺、Y³⁺、Sr²⁺、Cs⁺的萃取选择性,结果表明该化合物对钍有很好的选择性。最后对萃合物结构进行了研究:用斜率法和等摩尔系列法都得出萃合物中钍和配体L是1:2结合的,用核磁证明了萃合物的结构。更多还原

【Abstract】 In this article,the 1,4,7,10-tetraazacyclotetradecane-l,4,7,10-tetra(4-nitrobenzyl)(L) has been synthesized successfully.The paper studies the extraction properties for thorium at different pH,different concentrations of salting agents(sodium nitrate),different extractant concentrations and different dilution respectively.The results showed that using dichloromethane as diluent in the pH = 4.63,salting-out agent concentration of 1mol / L thorium ions have a good extraction efficiency,E%= 94.90%。Finally,the structures of the chelates are studied:using the slope method and equimolar series method both obtained the formation of 1:2 Th-L complex,and proved the structure of the extracted complex by NMR.更多还原