Prediction of trivalent actinide amino(poly)carboxylate complex stability constants using linear free energy relationships with the lanthanide series

ABSTRACT

There is a gap in the literature regarding the complexation of amino(poly)carboxylate (APC) ligands with trivalent actinides. The chemistry of the trivalent actinides is considered to be nearly identical to that of the trivalent lanthanides, but the trivalent actinides express a slight enhancement when binding APC ligands. Presented in this report is a method of predicting the stability constants of the Pu(III), Am(III), Cm(III), Bk(III) and Cf(III) using linear free energy relationships of the actinides and the lanthanide series for 91 APCs. This method produced actinide stability constants within uncertainties to those in available literature values for most ligands.

KEYWORDS:

• Trivalent Actinide
• Lanthanide
• LFER
• Stability Constants
• APC Ligands

Funding

This work was supported by a U.S. Department of Homeland Security Domestic Nuclear Detection Office under a Nuclear Technical Nuclear Forensics Center Postdoctoral Fellowship.

Supplemental data

Supplemental data for this article can be accessed on the publisher’s website.

Notes

¹ CDTA was excluded from this study due to the structural contributions to the thermodynamics imposed by its cyclohexane backbone.

Additional information

Funding

This work was supported by a U.S. Department of Homeland Security Domestic Nuclear Detection Office under a Nuclear Technical Nuclear Forensics Center Postdoctoral Fellowship.