3919402

Properties of lanthanides and actinides in carboxylate-functionalized task-specific ionic liquids

Date
August 13, 2023
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Task-specific ionic liquids (TSILs) have attracted much attention as environmentally friendly solvents for metal dissolution and separation of f-elements. The carboxylate-functionalized TSIL family is of interest due to the ability to complex metal centers, which leads to increased metal solubility, as well as displaying a temperature-dependent phase-switching behavior. Betaine bis(trifluoromethylsulfonyl)imide, ([Hbet][Tf2N]), is a noteworthy IL that solubilizes both lanthanides(III) and uranium(VI). We have systematically varied the cation to probe chemistry across a family of betaine-derivative TSILs. We compare the coordination and speciation changes of Ln(III) and An (IV, VI) with alterations in the cation structures. In addition, we explore the properties of this family of TSILs with addition of Ln(III) and An (IV, VI) for exploitation in separation schemes.

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