While Frank would eventually contribute significantly to our Division of Nuclear Science & Technology (NUCL), both as long time NUCL Secretary and educator at the San Jose Nuclear Chemistry Summer School, his early technical contributions were in the lab of Gregg Choppin examining the solution thermodyanamics of f-element complexation.  This presentation will examine his contributions in the broader scope of using thermodyanamics to understand actinide covalency � particularly in the vein of (poly)aminopolycarboxylate (APC) ligands. Courtesy application of APC ligands in over fifty years of actinide separation science, the best defined interactions of actinides with soft donors in aqueous solutions involve APC ligands.  These interactions are usually defined in terms of stability constants, especially for the trans-americium actinides, with minimal dialogue regarding enthalpic and entropic contributions to the binding.  To better understand the role of covalency in the binding of actinides heavier than Cm, radiotracer techniques, such as those used by Frank, will be necessary due to limited material availability and radiological hazards.  An argument is presented that expansion of APC thermodynamic data with heavier actinides could be instructive regarding fundamental f-element science.  The benefit of producing lanthanide-normalized linear free energy diagrams to describe actinide covalency is also highlighted

Thermodynamics of actinide interactions with soft donors: Observations of our friend, Frank Kinard, and future directions

248th National Meeting (2014)

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