Aggregation and metal ion extraction properties of novel, silicon-substituted alkylenediphosphonic acids..

摘要

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 beha ior has been investigated.