Complexation of NpO2+ with (2-Hydroxyethyl)ethylenediaminetriacetic Acid (HEDTA) in Aqueous Solutions: Thermodynamic Studies and Structural Analysis

Li, Xingliang; Zhang, Zhicheng; Martin, Leigh R; Luo, Shunzhong; Rao, Linfeng

doi:10.1039/C6RA17818A

Title: Complexation of NpO2+ with (2-Hydroxyethyl)ethylenediaminetriacetic Acid (HEDTA) in Aqueous Solutions: Thermodynamic Studies and Structural Analysis

Abstract

Complexation of Np(V) with N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA) was studied in aqueous solution (I = 1.0 mol L^-1 NaClO₄, t = 25 °C) by spectrophotometry, microcalorimetry and Extended X-ray absorption fine structure (EXAFS) spectroscopy. Equilibrium constants for the formation of three complexes, NpO₂L^2-, NpO₂(HL)^-, and (NpO₂)2(OH)2L26^-, were determined to be (6.91 ± 0.06), (4.28 ± 0.03) and -(4.93 ± 0.03), respectively. The enthalpies of complexation were determined to be -(8.0 ± 2.0) kJ mol^-1 for NpO₂L₂^- and -(2.2 ± 2.0) kJ mol-1 for NpO₂(HL)^-. Thermodynamic data of the complexation of Np(V) with HEDTA were compared to those of Np(V) with other aminopolycarboxylic acids, gaining insight into the possible coordination modes of the complexes. The EXAFS studies provided further structural information on those modes. In both NpO₂L₂^- and NpO₂(HL)^- complexes, HEDTA coordinates to Np(V) in a tridentate mode through two oxygens of two carboxylic groups and one nitrogen of the amine group. In the (NpO₂)₂(OH)₂L₂^6- complex, two Np(V) atoms are bridged by two hydroxides and each HEDTA maintains the tridentate coordination mode.

Authors:

Li, Xingliang ^[1]; Zhang, Zhicheng ^[1]; Martin, Leigh R ^[2]; Luo, Shunzhong ^[1]; Rao, Linfeng ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Fri Dec 02 00:00:00 EST 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1337050

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: RSC Advances

Additional Journal Information:: Journal Volume: 6; Journal ID: ISSN 2046-2069

Publisher:: Royal Society of Chemistry

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Neptunium

Citation Formats


                    Li, Xingliang, Zhang, Zhicheng, Martin, Leigh R, Luo, Shunzhong, and Rao, Linfeng. Complexation of NpO2+ with (2-Hydroxyethyl)ethylenediaminetriacetic Acid (HEDTA) in Aqueous Solutions: Thermodynamic Studies and Structural Analysis.  United States: N. p., 2016. 
Web.  doi:10.1039/C6RA17818A.

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                    Li, Xingliang, Zhang, Zhicheng, Martin, Leigh R, Luo, Shunzhong, & Rao, Linfeng. Complexation of NpO2+ with (2-Hydroxyethyl)ethylenediaminetriacetic Acid (HEDTA) in Aqueous Solutions: Thermodynamic Studies and Structural Analysis.  United States.  https://doi.org/10.1039/C6RA17818A

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                    Li, Xingliang, Zhang, Zhicheng, Martin, Leigh R, Luo, Shunzhong, and Rao, Linfeng. Fri .  
"Complexation of NpO2+ with (2-Hydroxyethyl)ethylenediaminetriacetic Acid (HEDTA) in Aqueous Solutions: Thermodynamic Studies and Structural Analysis".  United States.  https://doi.org/10.1039/C6RA17818A.  https://www.osti.gov/servlets/purl/1337050.

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@article{osti_1337050,

  title        = {Complexation of NpO2+ with (2-Hydroxyethyl)ethylenediaminetriacetic Acid (HEDTA) in Aqueous Solutions: Thermodynamic Studies and Structural Analysis},

  author       = {Li, Xingliang and Zhang, Zhicheng and Martin, Leigh R and Luo, Shunzhong and Rao, Linfeng},

  abstractNote = {Complexation of Np(V) with N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA) was studied in aqueous solution (I = 1.0 mol L-1 NaClO4, t = 25 °C) by spectrophotometry, microcalorimetry and Extended X-ray absorption fine structure (EXAFS) spectroscopy. Equilibrium constants for the formation of three complexes, NpO2L2-, NpO2(HL)-, and (NpO2)2(OH)2L26-, were determined to be (6.91 ± 0.06), (4.28 ± 0.03) and -(4.93 ± 0.03), respectively. The enthalpies of complexation were determined to be -(8.0 ± 2.0) kJ mol-1 for NpO2L2- and -(2.2 ± 2.0) kJ mol-1 for NpO2(HL)-. Thermodynamic data of the complexation of Np(V) with HEDTA were compared to those of Np(V) with other aminopolycarboxylic acids, gaining insight into the possible coordination modes of the complexes. The EXAFS studies provided further structural information on those modes. In both NpO2L2- and NpO2(HL)- complexes, HEDTA coordinates to Np(V) in a tridentate mode through two oxygens of two carboxylic groups and one nitrogen of the amine group. In the (NpO2)2(OH)2L26- complex, two Np(V) atoms are bridged by two hydroxides and each HEDTA maintains the tridentate coordination mode.},

  doi          = {10.1039/C6RA17818A},

  journal      = {RSC Advances},

  number       = ,

  volume       = 6,

  place        = {United States},

  year         = {Fri Dec 02 00:00:00 EST 2016},

  month        = {Fri Dec 02 00:00:00 EST 2016}

}

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Works referenced in this record:

ATHENA , ARTEMIS , HEPHAESTUS : data analysis for X-ray absorption spectroscopy using IFEFFIT
journal, June 2005

Ravel, B.; Newville, M.
Journal of Synchrotron Radiation, Vol. 12, Issue 4
DOI: 10.1107/S0909049505012719

Complexation of NpO2+ with N-methyl-iminodiacetic acid: a comparison with iminodiacetic and dipicolinic acids
journal, January 2010

Tian, Guoxin; Rao, Linfeng
Dalton Transactions, Vol. 39, Issue 41
DOI: 10.1039/c0dt00779j

Hydrolysis of neptunium(V) at variable temperatures (10–85°C)
journal, December 2004

Rao, Linfeng; Srinivasan, Thandankorai G.; Garnov, Alexander Yu
Geochimica et Cosmochimica Acta, Vol. 68, Issue 23
DOI: 10.1016/j.gca.2004.06.007

Investigation of equilibria in solution. Determination of equilibrium constants with the HYPERQUAD suite of programs
journal, October 1996

Gans, P.; Sabatini, A.; Vacca, A.
Talanta, Vol. 43, Issue 10
DOI: 10.1016/0039-9140(96)01958-3

Structural Variability in Neptunium(V) Oxalate Compounds: Synthesis and Structural Characterization of Na ₂ NpO ₂ (C ₂ O ₄ )OH·H ₂ O
journal, October 2004

Bean, Amanda C.; Garcia, Eduardo; Scott, Brian L.
Inorganic Chemistry, Vol. 43, Issue 20
DOI: 10.1021/ic0492082

Structural Environment and Stability of the Complexes Formed Between Calmodulin and Actinyl Ions
journal, March 2016

Brulfert, Florian; Safi, Samir; Jeanson, Aurélie
Inorganic Chemistry, Vol. 55, Issue 6
DOI: 10.1021/acs.inorgchem.5b02440

EXAFS spectroscopic study of neptunium(V) sorption at the .alpha.-iron hydroxide oxide (.alpha.-FeOOH)/water interface
journal, February 1992

Combes, Jean Marie; Chisholm-Brause, Catherine J.; Brown, Gordon E.
Environmental Science & Technology, Vol. 26, Issue 2
DOI: 10.1021/es00026a020

Determination of the equivalence point in potentiometric titrations. Part II
journal, January 1952

Gran, Gunnar
The Analyst, Vol. 77, Issue 920
DOI: 10.1039/an9527700661

Synthesis and Characterization of Uranyl Compounds with Iminodiacetate and Oxydiacetate Displaying Variable Denticity
journal, May 2002

Jiang, J.; Sarsfield, M. J.; Renshaw, J. C.
Inorganic Chemistry, Vol. 41, Issue 10
DOI: 10.1021/ic020121v

Reverse polarity capillary zone electrophoretic determination of ethylenediaminetetraacetic acid andN-hydroxyethyl ethylenediaminetriacetic acid in Hanford defense waste
journal, January 2000

Okemgbo, Asopuru A.; Hill, Herbert H.; Metcalf, Steven G.
Journal of Microcolumn Separations, Vol. 12, Issue 1
DOI: 10.1002/(SICI)1520-667X(2000)12:1<48::AID-MCS7>3.0.CO;2-A

Analysis of organics in highly radioactive nuclear wastes
journal, July 1988

Toste, A. P.; Lechner-Fish, T. J.; Hendren, D. J.
Journal of Radioanalytical and Nuclear Chemistry Articles, Vol. 123, Issue 1
DOI: 10.1007/BF02036387

Study of the complexes of Np(V) with organic ligands by solvent extraction with TTA and 1, 10-phenanthroline
journal, January 1983

Inoue, Yasushi; Tochiyama, Osamu
Polyhedron, Vol. 2, Issue 7
DOI: 10.1016/S0277-5387(00)81523-5

Chelatgleichgewichte fünfwertiger transurane mit aminopolykarbonsäuren
journal, January 1970

Eberle, S. H.; Wede, U.
Journal of Inorganic and Nuclear Chemistry, Vol. 32, Issue 1
DOI: 10.1016/0022-1902(70)80454-7

Complexation of Neptunium(V) by Halo- and Hydroxycarboxylate Ligands
journal, January 1990

Rizkalla, E. N.; Nectoux, F.; Dabos-Seignon, S.
Radiochimica Acta, Vol. 51, Issue 3
DOI: 10.1524/ract.1990.51.3.113

Simultaneous Calculation of Equilibrium Constants and Standard Formation Enthalpies from Calorimetric Data for Systems with Multiple Equilibria in Solution
journal, February 2008

Gans, Peter; Sabatini, Antonio; Vacca, Alberto
Journal of Solution Chemistry, Vol. 37, Issue 4
DOI: 10.1007/s10953-008-9246-6

Hyperquad simulation and speciation (HySS): a utility program for the investigation of equilibria involving soluble and partially soluble species
journal, April 1999

Alderighi, Lucia; Gans, Peter; Ienco, Andrea
Coordination Chemistry Reviews, Vol. 184, Issue 1
DOI: 10.1016/S0010-8545(98)00260-4

Interaction of Neptunyl(V) and Uranyl(VI) with EDTA in NaCl Media: Experimental Study and Pitzer Modeling
journal, January 1998

Pokrovsky, Oleg S.; Bronikowski, Michael G.; Moore, Robert C.
Radiochimica Acta, Vol. 80, Issue 1
DOI: 10.1524/ract.1998.80.1.23

Multiple-scattering calculations of x-ray-absorption spectra
journal, July 1995

Zabinsky, S. I.; Rehr, J. J.; Ankudinov, A.
Physical Review B, Vol. 52, Issue 4
DOI: 10.1103/PhysRevB.52.2995

Effect of temperature on the protonation of N-(2-hydroxyethyl)ethylenediamine-N,N′,N′-triacetic acid in aqueous solutions: Potentiometric and calorimetric studies
journal, June 2015

Li, Xingliang; Zhang, Zhicheng; Endrizzi, Francesco
The Journal of Chemical Thermodynamics, Vol. 85
DOI: 10.1016/j.jct.2014.12.026

Alternatives to HDEHP and DTPA for Simplified TALSPEAK Separations
journal, June 2011

Braley, Jenifer C.; Grimes, Travis S.; Nash, Kenneth L.
Industrial & Engineering Chemistry Research, Vol. 51, Issue 2
DOI: 10.1021/ie200285r

Mixed Hydroxo-Carbonate Complexes of Neptunium(V)
journal, January 1997

Neck, V.; Fanghänel, Th.; Kim, J. I.
Radiochimica Acta, Vol. 77, Issue 3
DOI: 10.1524/ract.1997.77.3.167

Organic analyses of an actual and simulated mixed waste: Hanford's organic complexant waste revisited
journal, July 1995

Toste, A. P.; Osborn, B. C.; Polach, K. J.
Journal of Radioanalytical and Nuclear Chemistry Articles, Vol. 194, Issue 1
DOI: 10.1007/BF02037609

Binary and ternary complexation of NpO2+ with carboxylate and aminocarboxylate ligands
journal, January 2014

Thakur, Punam; Van Luik, Abraham E. 
Radiochimica Acta, Vol. 102, Issue 9
DOI: 10.1515/ract-2013-2205

Investigation of Aquo and Chloro Complexes of UO ₂ ²⁺ , NpO ₂ ⁺ , Np ⁴⁺ , and Pu ³⁺ by X-ray Absorption Fine Structure Spectroscopy
journal, October 1997

Allen, P. G.; Bucher, J. J.; Shuh, D. K.
Inorganic Chemistry, Vol. 36, Issue 21
DOI: 10.1021/ic970502m

Metal ion interferences in reverse polarity capillary zone electrophoretic analysis of Hanford Defense Waste for ethylenediaminetetraacetic acid (EDTA) and n-hydroxyethylethylenediaminetriacetic acid (HEDTA)
journal, September 1999

Okemgbo, Asopuru A.; Hill, Herbert H.; Metcalf, Steven G.
Analytica Chimica Acta, Vol. 396, Issue 2-3
DOI: 10.1016/S0003-2670(99)00449-3

Symmetry, Optical Properties and Thermodynamics of Neptunium(V) Complexes
journal, December 2009

Rao, Linfeng; Tian, Guoxin
Symmetry, Vol. 2, Issue 1
DOI: 10.3390/sym2010001

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Title: Complexation of NpO2+ with (2-Hydroxyethyl)ethylenediaminetriacetic Acid (HEDTA) in Aqueous Solutions: Thermodynamic Studies and Structural Analysis

Abstract

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