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Structural and Spectroscopic Characterization of Plutonium and Other Tetravalent Metals Complexed to a Keggin Ion

Journal Article · · Inorganic Chemistry
 [1];  [2];  [3];  [2];  [2];  [4];  [2]
  1. Oregon State Univ., Corvallis, OR (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  3. Sandia National Laboratories (SNL), Livermore, CA (United States)
  4. Oregon State Univ., Corvallis, OR (United States)
Here, we report the isolation of the first plutonium(IV) complex with a Keggin ion chelator: Cs20[Pu(PW11O39)2]2·13H2O. Single crystal XRD and solid-state UV–vis absorbance analysis demonstrate the stabilization of Pu4+ by the Keggin ligand. The unit cell contains two [Pu(PW11O39)2]10– complexes (Pu(PW11)2) bridged by Cs+. Raman and 31P NMR spectra of Pu(PW11)2 are consistent with the analogous Zr4+, Hf4+, Ce4+, and Th4+ complexes. The Pu–O bond distances at the two Pu sites are 2.35(3) and 2.34(3) Å, matching the value extrapolated from the bonding trend built with the other 8-coordinated tetravalent cations. However, the long-range arrangement of the Pu(PW11)2 complexes within the lattice is unique in the series of MIV(PW11)2 compounds: pairs of Pu(PW11)2 are organized perpendicular to each other. Based on solution-state UV–visible absorbance, small-angle X-ray scattering (SAXS), and 31P NMR, the tetravalent cations quantitatively form the 1:2 species in solution ([Pu(PW11O39)2]10–(aq)) and no 1:1 species ([Pu(PW11O39)(H2O)x]3–(aq)). Finally, a linear correlation exists between the metal–oxygen distances in the MIV(PW11)2 compounds and the corresponding metal dioxides, allowing for extrapolation for Pa4+, Am4+, and Bk4+. The results indicate that our microscale POM approach represents a viable pathway to probe properties of rare actinide ions in discrete molecules, beyond the traditional oxide extended solids.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-07NA27344; NA0003525
OSTI ID:
3003811
Report Number(s):
LLNL--JRNL-2009847
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry; ISSN 0020-1669; ISSN 1520-510X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (70)

Potassium Octadecatungstodiphosphates(V) and Related Lacunary Compounds other December 2006
The Structure of the Plutonium Oxide Nanocluster [Pu38O56Cl54(H2O)8]14− journal January 2008
Neptunium Diverges Sharply from Uranium and Plutonium in Crystalline Borate Matrixes: Insights into the Complex Behavior of the Early Actinides Relevant to Nuclear Waste Storage journal January 2010
Separation of Plutonium Oxide Nanoparticles and Colloids journal September 2011
A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO 2 Nanoparticles journal December 2019
Spatiotemporal Studies of Soluble Inorganic Nanostructures with X‐rays and Neutrons journal October 2023
Solid-State Structure of Tris-Cyclopentadienide Uranium(III) and Plutonium(III) journal December 2017
Extension of the Plutonium Oxide Nanocluster Family to Include {Pu 16 } and {Pu 22 } journal January 2019
How Does Iron Storage Protein Ferritin Interact with Plutonium (and Thorium)? journal December 2020
Preparation of rare metallic actinides (248Cm,249Bk,249Cf) and investigation of their crystal structure journal November 1990
On the californium oxide system journal February 1972
Neptunium compounds under high pressure journal July 1986
Low temperature lattice expansion of americium dioxide journal October 1980
Small-angle X-ray scattering to determine solution speciation of metal-oxo clusters journal December 2017
Recent developments in nonaqueous plutonium coordination chemistry journal June 2010
A Single Small-Scale Plutonium Redox Reaction System Yields Three Crystallographically-Characterizable Organoplutonium Complexes journal September 2020
Contrasting Trivalent Lanthanide and Actinide Complexation by Polyoxometalates via Solution-State NMR journal December 2022
Stabilization of Pu(IV) in PuBr4(OPCy3)2 and Comparisons with Structurally Similar ThX4(OPR3)2 (R = Cy, Ph) Molecules journal October 2023
From +I to +IV, Alkalis to Actinides: Capturing Cations across the Periodic Table with Keggin Polyoxometalate Ligands journal August 2024
Breaking the Neptunyl Barrier: Direct Access to Neptunium(IV) in Aqueous Solution via Polyoxometalate-Mediated Reduction and Stabilization journal September 2025
Vacancy Generation and Oxygen Uptake in Cu-Doped Pr-CeO2 Materials using Neutron and in Situ X-ray Diffraction journal December 2016
Sol–Gel Synthesis of High-Purity Actinide Oxide ThO2 and Its Solid Solutions with Technologically Important Tin and Zinc Ions journal December 2016
Evaluation of Point Group Symmetry in Lanthanide(III) Complexes: A New Implementation of a Continuous Symmetry Operation Measure with Autonomous Assignment of the Principal Axis journal June 2024
The Structure and Synthesis of Plutonium(III) Chlorides from Aqueous Solution journal October 2006
Comparisons of Pu(IV) and Ce(IV) Diphosphonates journal April 2010
Surprising Coordination for Plutonium in the First Plutonium(III) Borate journal March 2011
Plutonium Transport in the Environment journal June 2012
Stabilization of Plutonium(III) in the Preyssler Polyoxometalate journal September 2008
Neutron Diffraction Study of the in Situ Oxidation of UO 2 journal August 2009
Synthesis and Structural Examination of Complexes of Am(IV) and Other Tetravalent Actinides with Lacunary Heteropolyanion α 2 -P 2 W 17 O 61 10− journal October 2009
A new structural type for heteropoly anions. The crystal structure of (NH4)2H6(CeMo12O42).12H2O journal June 1968
The Preparation of Some Protactinium Compounds and the Metal 1 journal December 1954
Advancement of Actinide Metal–Organic Framework Chemistry via Synthesis of Pu-UiO-66 journal April 2020
MOFs with 12-Coordinate 5f-Block Metal Centers journal February 2022
Carbene Complexes of Plutonium: Structure, Bonding, and Divergent Reactivity to Lanthanide Analogs journal February 2024
Identification of the Formal +2 Oxidation State of Plutonium: Synthesis and Characterization of {Pu II [C 5 H 3 (SiMe 3 ) 2 ] 3 } journal March 2017
Polyoxometalate Ligands Reveal Different Coordination Chemistries Among Lanthanides and Heavy Actinides journal May 2024
Incipient class II mixed valency in a plutonium solid-state compound journal May 2017
An iron-dependent and transferrin-mediated cellular uptake pathway for plutonium journal June 2011
Polyoxometalates as ligands to synthesize, isolate and characterize compounds of rare isotopes on the microgram scale journal September 2022
Ultrafiltration separation of Am(VI)-polyoxometalate from lanthanides journal April 2023
Luminescence in CeIV polyoxometalate [Ce(W5O18)2]8−: a combined experimental and theoretical study journal January 2010
Origins of the odd optical observables in plutonium and americium tungstates journal January 2019
First observation of [Pu6(OH)4O4]12+ cluster during the hydrolytic formation of PuO2 nanoparticles using H/D kinetic isotope effect journal January 2022
Synthesis and multi-scale properties of PuO2 nanoparticles: recent advances and open questions journal January 2022
Chronicles of plutonium peroxides: spectroscopic characterization of a new peroxo compound of Pu(iv) journal January 2024
Characterization of the first Peacock–Weakley polyoxometalate containing a transplutonium element: curium bis-pentatungstate [Cm(W5O18)2]9− journal May 2024
Isolation of a new polyoxometalate complex of plutonium journal January 2025
Probing the 5f electrons in a plutonyl(vi) cluster complex journal January 2009
Receptor recognition of transferrin bound to lanthanides and actinides: a discriminating step in cellular acquisition of f-block metals journal January 2013
Heteropolytungstate complexes of the lanthanide elements. Part I. Preparation and reactions journal January 1971
X-ray diffraction "fingerprinting" of DNA structure in solution for quantitative evaluation of molecular dynamics simulation journal February 2006
Siderocalin-mediated recognition, sensitization, and cellular uptake of actinides journal August 2015
The Structure and Formula of 12-Phosphotungstic Acid journal March 1934
The crystal structure of H 3PW12O40. 29H2O
  • Bradley, Albert James; Illingworth, J. W.
  • Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, Vol. 157, Issue 890, p. 113-131 https://doi.org/10.1098/rspa.1936.0183
journal September 1936
Radioactive Element 94 from Deuterons on Uranium journal April 1946
Low-temperature polymorphs of Zr O 2 and Hf O 2 : A density-functional theory study journal October 2005
New hermetic sample holder for radioactive materials fitting to Siemens D5000 and Bruker D8 X-ray diffractometers: application to the Rietveld analysis of plutonium dioxide journal November 2004
OLEX2 : a complete structure solution, refinement and analysis program journal January 2009
Irena : tool suite for modeling and analysis of small-angle scattering journal February 2009
Small-angle scattering. Information content and error analysis journal April 1980
A short history of SHELX journal December 2007
The structure of the 9(18)-heteropoly anion in potassium 9(18)-tungstophosphate, K6(P2W18O62).14H2O journal February 1953
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides journal September 1976
The geometry of polyhedral distortions. Predictive relationships for the phosphate group journal May 1974
Recent developments in the Inorganic Crystal Structure Database: theoretical crystal structure data and related features journal September 2019
The Cambridge Structural Database
  • Groom, Colin R.; Bruno, Ian J.; Lightfoot, Matthew P.
  • Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, Vol. 72, Issue 2, p. 171-179 https://doi.org/10.1107/S2052520616003954
journal April 2016
SHELXT – Integrated space-group and crystal-structure determination journal January 2015
Synthesis and structure of dodecamolybdates of tetravalent cerium, thorium, uranium, neptunium, and plutonium journal September 2016
NMR nomenclature. Nuclear spin properties and conventions for chemical shifts(IUPAC Recommendations 2001) journal January 2001

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