Two novel aqueous based synthetic routes for the production of NpI4 have been developed. The first method involves reduction of Np(V) in nitrate media to Np(IV) by controlled potential electrolysis. Following this reduction, Np(IV) is extracted into an organic phase using thenoyltrifluoroacetone (TTA) whereby it is then stripped into concentrated iodide media where the complex is formed. The second method uses controlled potential electrolysis techniques to directly reduce Np in iodide media, thus generating Np(IV)-Iodide in situ. Confirmation of successful synthesis was performed using UV-visible-nIR spectroscopy. Solid NpI4 is made from these solutions by inducing crystallization. Both methods represent facile, low-hazard techniques to synthesize materials in sufficient quantities for actinide organometallic chemistry studies. Additionally, adequate quantities of material can be made for investigations regarding the thermodynamic properties and vapor pressure of this material. Techniques for synthesis of the similar NpI3 compound and characterization will also be discussed.

Facile synthesis of NpI4 in solution

249th National Meeting (2015)

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