Preorganization of diglycolamides on the calix[4]arene platform and its effect on the extraction of Am(III)/Eu(III)

TETRAHEDRON

卷:68

Article

Iqbal, Mudassir¹  Mohapatra, Prasanta K.²  Ansari, Seraj A.²  Huskens, Jurriaan¹  Verboom, Willem¹ 

[1] Univ Twente, Lab Mol Nanofabricat, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[2] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India

关键词: Actinide/lanthanide extraction;    Diglycolamides;    TODGA;    Calixarenes;    Preorganization;   

DOI  :  10.1016/j.tet.2012.07.036

来源: Elsevier

【 摘 要 】

Different diglycolamide (DGA)-substituted calix[4]arene-based extractants were synthesized and evaluated for the extraction of Am(III) and Eu(III), representative trivalent actinide and lanthanide ions, respectively. On the narrow rim of the calix[4]arene platform, the DGA moiety was either 1,3-di- or tetrasubstituted with a varying spacer length between the oxygen and amide nitrogen atom. In addition, DGA groups were appended both to the wide rim and to both rims of calix[4]arenes and their efficiencies were compared for Am(III) and Eu(III) extraction at three different feed acidities. The extraction and separation efficiencies strongly depended on the N-alkyl substituent as well as the spacer length. 1,3-Di-DGA-substituted calix[4]arenes are inferior extractants to the corresponding tetra-DGA-substituted ones. Narrow rim DGA-functionalized derivatives resulted in high extraction efficiencies, while the wide rim DGA-functionalized calix[4]arenes showed practically no extraction. (c) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

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