Synthesis of task-specific ionic liquids with grafted diglycolamide moiety. Complexation and stripping of lanthanides

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• 作者：Wu Yun (3)
  Zhang Youwen (1)
  Fan Fuyou (1)
  Luo Huimin (2)
  Hu Peizhuo (1)
  Shen Yinglin (1)
  
• 关键词：Task ; specific ionic liquids ; Diglycolamide ; Solvent extraction ; Stripping ; Lanthanides
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2014
• 出版时间：March 2014
• 年：2014
• 卷：299
• 期：3
• 页码：1213-1218
• 全文大小：389 KB
• 作者单位：Wu Yun (3)
  Zhang Youwen (1)
  Fan Fuyou (1)
  Luo Huimin (2)
  Hu Peizhuo (1)
  Shen Yinglin (1)
  
  3. Northwest University for Nationalities, Lanzhou, 730000, People’s Republic of China
  1. Radiochemistry Laboratory, Lanzhou University, Lanzhou, 730000, People’s Republic of China
  2. Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
  
• ISSN：1588-2780

文摘

Task-specific ionic liquids (TSILs) of a novel class, with the diglycolamide moietity grafted in the alkyl chain of imidazolium cation, were synthesized and characterized. Lanthanide complexation capabilities of TSILs as active components of solid phase extractants were evaluated by studies on the adsorption of lanthanides from aqueous solutions. The TSIL-based solid adsorbents prepared by immobilization of long-alkyl-chain TSILs in siliceous mesostructured cellular foams adsorb trivalent lanthanides. No extraction of lanthanides from aqueous solution into 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C6mim][Nf2T]) was observed at any acidity in the presence of these TSILs in the aqueous phase. This implies that TSILs suppress the extraction of lanthanides by formation of water-soluble complexes. The TSILs added to solvent extraction systems consisting of N,N,N-em class="a-plus-plus">,N-tetraoctyl-3-oxapentanediamide (TODGA) in [C6mim][Nf2T] and aqueous HNO3 solutions show very good stripping properties for lanthanides.