Recent work on the chemistry of the actinides has seen a larger focus on actinides outside of Th, U, Np, and Pu. In particular, the number of studies featuring Bk has allowed for a more thorough look at the entire actinide series up to Cf. Here, the local structure of actinide coordination compounds of Th through Cf using the EXAFS technique are presented in order to begin to elucidate the fundamental bonding interactions, presenting a fresh look at understanding the roles of covalence and structure. The EXAFS technique allows for a broad look at many complexes due to its ability to obtain structural information on microgram quantities of material in the liquid form. Ligands are typically chosen in relation to separations and chelation strategies, including bio-inspired hydroxypyridinone hard oxygen-donors and about a dozen other ligands. The structural results are presented in the context of other characterizations, including luminescence, and in their relation to protein interactions. Combined with theoretical predictions, these data add significant insight to the field of actinide chemistry, and may lead to innovative characterization methods and separation processes.

Bonding in the actinide series: Using EXAFS to systematically probe coordination compound structures of Th through Cf

2019 Spring National Meeting

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