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Aggregation and metal ion extraction properties of novel, silicon-substituted alkylenediphosphonic acids [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2001.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
vp : digital, PDF file
Additional Creators:
Argonne National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
In conjunction with efforts to develop novel actinide extractants exhibiting solubility in supercritical carbon dioxide, the effect of adding silicon-based functionalities to diphosphonic acids has been investigated. Specifically, a series of silyl-substituted diphosphonic acids has been prepared and characterized, and their aggregation and metal ion extraction properties compared with alkyl-substituted diphosphonic acids, reagents previously demonstrated to be effective extractants of actinides from acidic aqueous media into various organic solvents. In addition, the influence of the number of methylene groups bridging the phosphorus atoms of the diphosphonic acids on their extraction behavior has been investigated. Variations in the extraction behavior of the compounds arising from differences in the number of bridging methylene groups have been shown to be attributable to a combination of factors, in particular, the aggregation state of the ligand, the size of the chelate rings formed upon complexation, the basicity of the phosphoryl group and the relative acidities of the ligands.
Report Numbers:
E 1.99:anl/chm/cp-103997
anl/chm/cp-103997
Subject(s):
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Note:
Published through SciTech Connect.
05/10/2001.
"anl/chm/cp-103997"
16th International Solvent Extraction Conference (ISEC 2002), Capetown (ZA), 03/18/2002--03/21/2002.
Chiarizia, R.; Dietz, M. L.; Herlinger, A. W.; McAlister, D. R.
Funding Information:
W-31-109-ENG-38
View MARC record | catkey: 14411310