TY - GEN
T1 - Recent progress in the development of supercritical carbon dioxide-soluble metal ion extractants
T2 - Solubility enhancement through silicon functionalization
AU - Dietz, Mark L.
AU - McAlister, Daniel R.
AU - Stepinski, Dominique
AU - Zalupski, Peter R.
AU - Dzielawa, Julie A.
AU - Barrans, Richard E.
AU - Hess, J. N.
AU - Rubas, Audris V.
AU - Chiarizia, Renato
AU - Lubbers, Christopher
AU - Scurto, Aaron M.
AU - Brennecke, Joan F.
AU - Herlinger, Albert W.
PY - 2006
Y1 - 2006
N2 - Efforts to employ partially-esterified alkylenediphosphonic acids (DPAs) in the supercritical fluid extraction of actinides have been hampered by their modest solubility in unmodified supercritical carbon dioxide (SC-CO 2). In an effort to design DPAs that are soluble in SC-CO 2, various silicon-substituted alkylenediphosphonic acids have been prepared and characterized, and their behavior compared with that of conventional alkyl-substituted reagents. Silicon substitution is shown to enhance the CO 2-philicity of the reagents, while other structural features (e.g., alkylene bridge length) determine their aggregation and extraction properties. The identification of DPAs combining desirable extraction properties with adequate solubility in SC-CO 2 is shown to be facilitated by the use of molecular connectivity indices.
AB - Efforts to employ partially-esterified alkylenediphosphonic acids (DPAs) in the supercritical fluid extraction of actinides have been hampered by their modest solubility in unmodified supercritical carbon dioxide (SC-CO 2). In an effort to design DPAs that are soluble in SC-CO 2, various silicon-substituted alkylenediphosphonic acids have been prepared and characterized, and their behavior compared with that of conventional alkyl-substituted reagents. Silicon substitution is shown to enhance the CO 2-philicity of the reagents, while other structural features (e.g., alkylene bridge length) determine their aggregation and extraction properties. The identification of DPAs combining desirable extraction properties with adequate solubility in SC-CO 2 is shown to be facilitated by the use of molecular connectivity indices.
UR - https://www.scopus.com/pages/publications/36749038298
M3 - Conference contribution
AN - SCOPUS:36749038298
SN - 0841239479
SN - 9780841239470
T3 - ACS Symposium Series
SP - 250
EP - 267
BT - Nuclear Waste Management Acconplishments of the Environmental Management Science Program
A2 - Wang, Paul
A2 - Zachry, Tiffany
ER -