For decades, heavy metals such as actinides and lanthanides have been raising environmental concerns due to contamination of ground water and the natural environment. However, since the lanthanide complexes have complicated electronic structure, there has been limited understanding of their spectral and magnetic properties, chemical reactivity, and binding effects. In order to design materials or extract lanthanides from their complexes, fundamental studies on the spectral properties are essential. We report 31P chemical shifts of tributyl phosphate (TBP) when equilibrated with varying ratios of the lanthanides Eu, Nd, and Pr. For example, in the study of Nd, we observed that chemical shifts remained constant from TBP:Nd ratios 1:1 to 2.75:1, then the chemical shift systematically moved toward the shift of free TBP as the ratio increased. This trend was also observed in the study of Eu and Pr. A knowledge of the systematic variation in chemical shift has potential application in characterization of extractant phases.

Utilization of <sup>31</sup>P NMR spectroscopy for understanding lanthanide complexes

247th National Meeting (2014)

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Utilization of 31P NMR spectroscopy for understanding lanthanide complexes

Utilization of ³¹P NMR spectroscopy for understanding lanthanide complexes