skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Quantifying the binding strength of salicylaldoxime–uranyl complexes relative to competing salicylaldoxime–transition metal ion complexes in aqueous solution: a combined experimental and computational study

Journal Article · · Dalton Transactions
DOI:https://doi.org/10.1039/c6dt00116e· OSTI ID:1462912

Here, the design of new ligands and investigation of UO22+ complexations are an essential aspect of reducing the cost of extracting uranium from seawater, improving the sorption efficiency for uranium and the selectivity for uranium over competing ions (such as the transition metal cations). The binding strengths of salicylaldoxime–UO22+ complexes were quantified for the first time and compared with the binding strengths of salicylic acid–UO22+ and representative amidoxime–UO22+ complexes. We found that the binding strengths of salicylaldoxime–UO22+ complexes are ~2–4 log β2 units greater in magnitude than their corresponding salicylic acid–UO22+ and representative amidoxime–UO22+ complexes; moreover, the selectivity of salicylaldoxime towards the UO22+ cation over competing Cu2+ and Fe3+ cations is far greater than those reported for salicylic acid and glutarimidedioxime in the literature. The higher UO22+ selectivity can likely be attributed to the different coordination modes observed for salicylaldoxime–UO22+ and salicylaldoxime–transition metal complexes. Density functional theory calculations indicate that salicylaldoxime can coordinate with UO22+ as a dianion species formed by η2 coordination of the aldoximate and monodentate binding of the phenolate group. In contrast, salicylaldoxime coordinates with transition metal cations as a monoanion species via a chelate formed between phenolate and the oxime N; the complexes are stabilized via hydrogen bonding interactions between the oxime OH group and phenolate. By coupling the experimentally determined thermodynamic constants and the results of theoretical computations, we are able to derive a number of ligand design principles to further improve the UO22+ cation affinity, and thus further increase the selectivity of salicylaldoxime derivatives.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1462912
Journal Information:
Dalton Transactions, Vol. 45, Issue 22; ISSN 1477-9226
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

References (57)

Vanadium speciation and cycling in coastal waters journal December 2009
Relativistic and correlation effects for element 105 (hahnium, Ha): a comparative study of M and MO (M = Nb, Ta, Ha) using energy-adjusted ab initio pseudopotentials journal June 1993
Predicting Stability Constants for Uranyl Complexes Using Density Functional Theory journal March 2015
IronIII and aluminiumIII complexes with substituted salicyl-aldehydes and salicylic acids journal November 2013
Removal of Toxic Uranium from Synthetic Nuclear Power Reactor Effluents Using Uranyl Ion Imprinted Polymer Particles journal May 2006
Insight into Technetium Amidoxime Complex: Oxo Technetium(V) Complex of N- Substituted Benzamidoxime as New Basic Structure for Molecular Imaging journal February 2011
Some theoretical and practical problems in the use of organic reagents in chemical analysis—V journal November 1965
Metal complexes of purine-N-oxides. I. The crystal structure of a copper(II) complex of doubly deprotonated adenine-N1-oxide journal September 1984
Sequestering uranium from seawater: binding strength and modes of uranyl complexes with glutarimidedioxime journal January 2012
Universal Solvation Model Based on Solute Electron Density and on a Continuum Model of the Solvent Defined by the Bulk Dielectric Constant and Atomic Surface Tensions
  • Marenich, Aleksandr V.; Cramer, Christopher J.; Truhlar, Donald G.
  • The Journal of Physical Chemistry B, Vol. 113, Issue 18, p. 6378-6396 https://doi.org/10.1021/jp810292n
journal May 2009
Coordination chemistry of polyoxomolybdates: The versatile behavior of amidoximes journal December 1996
Acidity of the Amidoxime Functional Group in Aqueous Solution: A Combined Experimental and Computational Study journal February 2015
The structures of phenolic oximes and their complexes journal June 2003
The M06 suite of density functionals for main group thermochemistry, thermochemical kinetics, noncovalent interactions, excited states, and transition elements: two new functionals and systematic testing of four M06-class functionals and 12 other functionals journal July 2007
Surface Coordination Chemistry: Corrosion Inhibition by Tetranuclear Cluster Formation of Iron with Salicylaldoxime journal April 1999
Raman spectroscopic determination of the acidity constants of salicylaldoxime in aqueous solution journal March 2011
Development of Sorbers for the Recovery of Uranium from Seawater. 1. Assessment of Key Parameters and Screening Studies of Sorber Materials journal August 1982
Extraction of Uranium from Sea Water journal September 1964
Complexation of glutarimidedioxime with Fe(iii), Cu(ii), Pb(ii), and Ni(ii), the competing ions for the sequestration of U(vi) from seawater journal January 2013
A Dimeric Copper(II) Complex of Oxalate and Oxamide Dioxime Ligands: Synthesis, Crystal Structure, Thermal Stability, and Magnetic Properties journal March 2014
Amidoximes as ligand functionalities for braided polymeric materials for the recovery of uranium from seawater journal April 2016
The Salicylate Method for Determining Microgram Amounts of Uranium report March 1955
Supramolecular chemistry in metal recovery; H-bond buttressing to tune extractant strength journal January 2007
How Amidoximate Binds the Uranyl Cation journal February 2012
Novel Dinuclear Uranyl Complexes with Asymmetric Schiff Base Ligands:  Synthesis, Structural Characterization, Reactivity, and Extraction Studies journal October 2007
Intermolecular interactions from a natural bond orbital, donor-acceptor viewpoint journal September 1988
Seawater Uranium Sorbents: Preparation from a Mesoporous Copolymer Initiator by Atom-Transfer Radical Polymerization journal October 2013
Determination of copper complexation in sea water by cathodic stripping voltammetry and ligand competition with salicylaldoxime journal January 1994
Spectrophotometric determination of acidity constants of salicylaldoxime in aqueous solution at 25°C and ionic strength of 0.5M controlled with NaCl journal April 2007
Development of Sorbers for the Recovery of Uranium from Seawater. Part 2. The Accumulation of Uranium from Seawater by Resins Containing Amidoxime and Imidoxime Functional Groups journal April 1983
Use of Solution-Phase Vibrational Frequencies in Continuum Models for the Free Energy of Solvation journal December 2011
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
New Insight of Coordination and Extraction of Uranium(VI) with N-Donating Ligands in Room Temperature Ionic Liquids: N , N ′-Diethyl- N , N ′-ditolyldipicolinamide as a Case Study journal January 2015
Chemical Forms of Uranium in Artificial Seawater journal February 1982
Reaction of oxomolybdenum complexes with amidoximes. Synthesis and structure of a nitrosylacetamidoximato(1-) complex with a N,O-side-on bonded acetamidoximate(1-) ligand: [Mo(acac)2 (CH3C(NH2)NO) (no)] journal October 1987
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density journal January 1988
Chemical Speciation of Uranium(VI) in Marine Environments: Complexation of Calcium and Magnesium Ions with [(UO 2 )(CO 3 ) 3 ] 4− and the Effect on the Extraction of Uranium from Seawater journal September 2014
Probing the Nature of Chemical Bonding in Uranyl(VI) Complexes with Quantum Chemical Methods journal November 2012
Natural hybrid orbitals journal September 1980
Recovery of Uranium from Seawater: A Review of Current Status and Future Research Needs journal January 2013
Crystal structures of bis[2,2'-iminobis(acetamidoxime)]nickel(II) chloride dihydrate and bis[2,2'-iminobis(acetamidoxime)]copper(II) chloride journal August 1970
Bis[N-(2,6-dimethylphenyl)aminoglyoximato-N,N']nickel(II) journal November 1996
Crystal structure of bis(acetato-κ O )bis(pyridine-2-carboxamide oxime-κ 2 N , N ′)cadmium ethanol disolvate journal August 2014
Hyperquad simulation and speciation (HySS): a utility program for the investigation of equilibria involving soluble and partially soluble species journal April 1999
Soluble rare earth and actinide species in seawater journal December 1989
The crystal structure of bis(5-chlorosalicylaldoximato)copper(II) journal September 1964
Using the Outer Coordination Sphere to Tune the Strength of Metal Extractants journal May 2011
Electronic Structure and Bonding in Actinyl Ions and their Analogs journal May 2007
The Cambridge Structural Database: a quarter of a million crystal structures and rising journal May 2002
Computational Study of Copper(II) Complexation and Hydrolysis in Aqueous Solutions Using Mixed Cluster/Continuum Models journal August 2009
Preparation of hydrophilic amidoxime fibers by cografting acrylonitrile and methacrylic acid from an optimized monomer composition journal October 2000
Fractional Elution and Determination of Uranium and Vanadium Adsorbed on Amidoxime Fiber from Seawater. journal January 2000
Protonation Constants of Some N-Substituted Amidoximes in a 50% Ethanol-Water Mixture (v/v). journal January 2000
Comparison of Amidoxime Adsorbents Prepared by Cografting Methacrylic Acid and 2-Hydroxyethyl Methacrylate with Acrylonitrile onto Polyethylene journal August 2000
Stereochemistry of nucleic acids and their constituents. XXI. The crystal and molecular structure of bis-(4-aminoimidazole-5-carboxamidoxime)copper(II) perchlorate, a degradation product of adenine N 1 -oxide journal July 1972
Thermodynamic studies of U(vi) complexation with glutardiamidoxime for sequestration of uranium from seawater journal January 2013
catena -Poly{[bis(2-amino-2-methyl-1-propanol)copper(II)-μ-salicylato(2–)- O : O ', O '']-copper(II)-μ-[salicylato(2–)- O ', O '': O ]} tetrakis(2-propanol) journal July 1982

Cited By (5)

Origin of the unusually strong and selective binding of vanadium by polyamidoximes in seawater journal November 2017
Bio-inspired nano-traps for uranium extraction from seawater and recovery from nuclear waste journal April 2018
Siderophore-inspired chelator hijacks uranium from aqueous medium journal February 2019
Paper-Based Analytical Device for Zinc Ion Quantification in Water Samples with Power-Free Analyte Concentration journal April 2017
Predicting Stability Constants for Terbium(III) Complexes with Dipicolinic Acid and 4-Substituted Dipicolinic Acid Analogues using Density Functional Theory journal November 2019