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Complexation of Actinides with Amide Derivatives of Oxydiacetic Acid

Published online by Cambridge University Press:  26 February 2011

Linfeng Rao  and
Guoxin Tian
Linfeng Rao
Affiliation:
LRao@lbl.gov, Lawrence Berkeley National Laboratory, 70A-1150, One Cyclotron Road, Berkeley, CA, 94720, United States
Guoxin Tian
Affiliation:
GTian@lbl.gov, Lawrence Berkeley National Laboratory
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Abstract

Complexation of Np(V), U(VI) and Nd(III) with dimethyl-3-oxa-glutaramic acid (DMOGA) and tetramethyl-3-oxa-glutaramide (TMOGA) was studied in comparison with the complexation with oxydiacetic acid (ODA). Stability constants and enthalpy of complexation were determined by potentiometry, spectrophotometry and calorimetry. Thermodynamic parameters, in conjunction with structural information of solid compounds, indicate that DMOGA and TMOGA form tridentate complexes with the ether-oxygen participating in bonding with actinide/lanthanide ions. The trends in the stability constants, enthalpy and entropy of complexation are discussed in terms of the difference in the hydration of the amide groups and carboxylate groups and the difference in the charge density of the metal ions.

Keywords

actinidelanthanidebonding
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 893: Symposium JJ – Actinides 2005 – Basic Science, Applications and Technology , 2005 , 0893-JJ08-06
Copyright
Copyright © Materials Research Society 2006

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References

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