1
|
Yu Y, Hao Y, Xiao B, Langer E, Novikov SA, Ramanantoanina H, Pidchenko I, Schild D, Albrecht-Schoenzart TE, Eichel RA, Vitova T, Alekseev EV. U(V) Stabilization via Aliovalent Incorporation of Ln(III) into Oxo-salt Framework. Chemistry 2024:e202401033. [PMID: 38775406 DOI: 10.1002/chem.202401033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Indexed: 06/29/2024]
Abstract
Pentavalent uranium compounds are key components of uranium's redox chemistry and play important roles in environmental transport. Despite this, well-characterized U(V) compounds are scarce primarily because of their instability with respect to disproportionation to U(IV) and U(VI). In this work, we provide an alternate route to incorporation of U(V) into a crystalline lattice where different oxidation states of uranium can be stabilized through the incorporation of secondary cations with different sizes and charges. We show that iriginite-based crystalline layers allow for systematically replacing U(VI) with U(V) through aliovalent substitution of 2+ alkaline-earth or 3+ rare-earth cations as dopant ions under high-temperature conditions, specifically Ca(UVIO2)W4O14 and Ln(UVO2)W4O14 (Ln=Nd, Sm, Eu, Gd, Yb). Evidence for the existence of U(V) and U(VI) is supported by single-crystal X-ray diffraction, high energy resolution X-ray absorption near edge structure, X-ray photoelectron spectroscopy, and optical absorption spectroscopy. In contrast with other reported U(V) materials, the U(V) single crystals obtained using this route are relatively large (several centimeters) and easily reproducible, and thus provide a substantial improvement in the facile synthesis and stabilization of U(V).
Collapse
Affiliation(s)
- Yi Yu
- School of Physics and Electronics information, Gannan Normal University, Ganzhou, 341000, PR China
| | - Yucheng Hao
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei, 230000, PR China
| | - Bin Xiao
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich, D-52428, Jülich, Germany
| | - Eike Langer
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich, D-52428, Jülich, Germany
| | - Sergei A Novikov
- Department of Chemistry, University of Georgia, 302 East Campus Road, Athens, GA 30602, USA
| | - Harry Ramanantoanina
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, D-76125, Karlsruhe, Germany g
| | - Ivan Pidchenko
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, D-76125, Karlsruhe, Germany g
| | - Dieter Schild
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, D-76125, Karlsruhe, Germany g
| | - Thomas E Albrecht-Schoenzart
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado, 80401, USA
| | - Rüdiger-A Eichel
- Institute of Energy and Climate Research (IEK-9), Forschungszentrum Jülich, D-52428, Jülich, Germany
| | - Tonya Vitova
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, D-76125, Karlsruhe, Germany g
| | - Evgeny V Alekseev
- Institute of Energy and Climate Research (IEK-9), Forschungszentrum Jülich, D-52428, Jülich, Germany
| |
Collapse
|
2
|
Ehrman J, Shumilov K, Jenkins AJ, Kasper JM, Vitova T, Batista ER, Yang P, Li X. Unveiling Hidden Shake-Up Features in the Uranyl M 4-Edge Spectrum. JACS AU 2024; 4:1134-1141. [PMID: 38559711 PMCID: PMC10976573 DOI: 10.1021/jacsau.3c00838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 04/04/2024]
Abstract
The M4,5-edge high energy resolution X-ray absorption near-edge structure (HR-XANES) spectra of actinyls offer valuable insights into the electronic structure and bonding properties of heavy-element complexes. To conduct a comprehensive spectral analysis, it is essential to employ computational methods that accurately account for relativistic effects and electron correlation. In this work, we utilize variational relativistic multireference configurational interaction methods to compute and analyze the X-ray M4-edge absorption spectrum of uranyl. By employing these advanced computational techniques, we achieve excellent agreement between the calculated spectral features and experimental observations. Moreover, the calculations unveil significant shake-up features, which arise from the intricate interplay between strongly correlated 3d core-electron and ligand excitations. This research provides important theoretical insights into the spectral characteristics of heavy-element complexes. Furthermore, it establishes the foundation for utilizing M4,5-edge spectroscopy as a means to investigate the chemical activities of such complexes. By leveraging this technique, we can gain a deeper understanding of the bonding behavior and reactivity of heavy-element compounds.
Collapse
Affiliation(s)
- Jordan
N. Ehrman
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Kirill Shumilov
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Andrew J. Jenkins
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Joseph M. Kasper
- Theoretical
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Tonya Vitova
- Institute
for Nuclear Waste Disposal (INE), Karlsruhe
Institute of Technology, P.O. Box 3640, Karlsruhe D-76021, Germany
| | - Enrique R. Batista
- Theoretical
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Theoretical
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Xiaosong Li
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| |
Collapse
|
3
|
Misael WA, Severo Pereira Gomes A. Core Excitations of Uranyl in Cs 2UO 2Cl 4 from Relativistic Embedded Damped Response Time-Dependent Density Functional Theory Calculations. Inorg Chem 2023; 62:11589-11601. [PMID: 37432868 DOI: 10.1021/acs.inorgchem.3c01302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
X-ray spectroscopies, by their high selectivity and sensitivity to the chemical environment around the atoms probed, provide significant insights into the electronic structures of molecules and materials. Interpreting experimental results requires reliable theoretical models, accounting for environmental, relativistic, electron correlation, and orbital relaxation effects in a balanced manner. In this work, we present a protocol for the simulation of core excited spectra with damped response time-dependent density functional theory based on the Dirac-Coulomb Hamiltonian (4c-DR-TD-DFT), in which environmental effects are accounted for through the frozen density embedding (FDE) method. We showcase this approach for the uranium M4- and L3-edges and oxygen K-edge of the uranyl tetrachloride (UO2Cl42-) unit as found in a host Cs2UO2Cl4 crystal. We have found that the 4c-DR-TD-DFT simulations yield excitation spectra that very closely match the experiment for the uranium M4-edge and the oxygen K-edge, with good agreement for the broad experimental spectra for the L3-edge. By decomposing the complex polarizability in terms of its components, we have been able to correlate our results with angle-resolved spectra. We have observed that for all edges, but in particular the uranium M4-edge, an embedded model in which the chloride ligands are replaced by an embedding potential reproduces rather well the spectral profile obtained for UO2Cl42-. Our results underscore the importance of the equatorial ligands to simulating core spectra at both uranium and oxygen edges.
Collapse
Affiliation(s)
- Wilken Aldair Misael
- Univ. Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | | |
Collapse
|
4
|
Kohlgruber TA, Surbella III RG. (NH 4) 2[UO 2Cl 4]·2H 2O, a new uranyl tetra-chloride with ammonium charge-balancing cations. Acta Crystallogr E Crystallogr Commun 2023; 79:702-706. [PMID: 37601403 PMCID: PMC10439412 DOI: 10.1107/s2056989023005753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 06/29/2023] [Indexed: 08/22/2023]
Abstract
A new uranyl tetra-chloride salt with chemical formula, (NH4)2[UO2Cl4]·2H2O, namely, di-ammonium uranyl tetra-chloride dihydrate, 1, was prepared and crystallized via slow evaporation from a solution of 2 M hydro-chloric acid. As confirmed by powder X-ray diffraction, the title compound crystallizes with an ammonium chloride impurity that formed as a result of the breakdown of a triazine precursor. The (UO2Cl4)2- dianion is charge balanced by ammonium cations, while an extensive hydrogen-bond network donated from structural water mol-ecules stabilize the overall assembly. Compound 1 adds to the extensive collection of actinyl tetra-chloride salts, but it represents the first without an alkali cation for purely inorganic compounds. Diffuse reflectance and luminescence spectra show typical absorption and emission behavior, respectively, of uranyl materials.
Collapse
|
5
|
Vitova T, Faizova R, Amaro-Estrada JI, Maron L, Pruessmann T, Neill T, Beck A, Schacherl B, Tirani FF, Mazzanti M. The mechanism of Fe induced bond stability of uranyl(v). Chem Sci 2022; 13:11038-11047. [PMID: 36320468 PMCID: PMC9517057 DOI: 10.1039/d2sc03416f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 08/03/2022] [Indexed: 08/02/2023] Open
Abstract
The stabilization of uranyl(v) (UO2 1 + ) by Fe(ii) in natural systems remains an open question in uranium chemistry. Stabilization of UVO2 1+ by Fe(ii) against disproportionation was also demonstrated in molecular complexes. However, the relation between the Fe(ii) induced stability and the change of the bonding properties have not been elucidated up to date. We demonstrate that U(v) - oaxial bond covalency decreases upon binding to Fe(ii) inducing redirection of electron density from the U(v) - oaxial bond towards the U(v) - equatorial bonds thereby increasing bond covalency. Our results indicate that such increased covalent interaction of U(v) with the equatorial ligands resulting from iron binding lead to higher stability of uranyl(v). For the first time a combination of U M4,5 high energy resolution X-ray absorption near edge structure (HR-XANES) and valence band resonant inelastic X-ray scattering (VB-RIXS) and ab initio multireference CASSCF and DFT based computations were applied to establish the electronic structure of iron-bound uranyl(v).
Collapse
Affiliation(s)
- Tonya Vitova
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) P.O. 3640 D-76021 Karlsruhe Germany
| | - Radmila Faizova
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Jorge I Amaro-Estrada
- LPCNO, University of Toulouse INSA Toulouse 135, Avenue de Rangueil Toulouse Cedex 31077 France
| | - Laurent Maron
- LPCNO, University of Toulouse INSA Toulouse 135, Avenue de Rangueil Toulouse Cedex 31077 France
| | - Tim Pruessmann
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) P.O. 3640 D-76021 Karlsruhe Germany
| | - Thomas Neill
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) P.O. 3640 D-76021 Karlsruhe Germany
| | - Aaron Beck
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) P.O. 3640 D-76021 Karlsruhe Germany
| | - Bianca Schacherl
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) P.O. 3640 D-76021 Karlsruhe Germany
| | - Farzaneh Fadaei Tirani
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Marinella Mazzanti
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| |
Collapse
|
6
|
Köhler L, Patzschke M, Bauters S, Vitova T, Butorin SM, Kvashnina KO, Schmidt M, Stumpf T, März J. Insights into the Electronic Structure of a U(IV) Amido and U(V) Imido Complex. Chemistry 2022; 28:e202200119. [PMID: 35179271 PMCID: PMC9310906 DOI: 10.1002/chem.202200119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Indexed: 01/02/2023]
Abstract
Reaction of the N‐heterocylic carbene ligand iPrIm (L1) and lithium bis(trimethylsilyl)amide (TMSA) as a base with UCl4 resulted in U(IV) and U(V) complexes. Uranium's +V oxidation state in (HL1)2[U(V)(TMSI)Cl5] (TMSI=trimethylsilylimido) (2) was confirmed by HERFD‐XANES measurements. Solid state characterization by SC‐XRD and geometry optimisation of [U(IV)(L1)2(TMSA)Cl3] (1) indicated a silylamido ligand mediated inverse trans influence (ITI). The ITI was examined regarding different metal oxidation states and was compared to transition metal analogues by theoretical calculations.
Collapse
Affiliation(s)
- Luisa Köhler
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Michael Patzschke
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Stephen Bauters
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.,The Rossendorf Beamline at ESRF at the European Synchrotron, CS40220, 38043, Grenoble Cedex 9, France
| | - Tonya Vitova
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021, Karlsruhe, Germany
| | - Sergei M Butorin
- Condensed Matter Physics of Energy Materials, X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20, Uppsala, Sweden
| | - Kristina O Kvashnina
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.,The Rossendorf Beamline at ESRF at the European Synchrotron, CS40220, 38043, Grenoble Cedex 9, France
| | - Moritz Schmidt
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Juliane März
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany
| |
Collapse
|
7
|
Kasper JM, Li X, Kozimor SA, Batista ER, Yang P. Relativistic Effects in Modeling the Ligand K-Edge X-ray Absorption Near-Edge Structure of Uranium Complexes. J Chem Theory Comput 2022; 18:2171-2179. [PMID: 35274960 DOI: 10.1021/acs.jctc.1c00851] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Accurate modeling of the complex electronic structure of actinide complexes requires full inclusion of relativistic effects. In this study, we examine the effect of explicit inclusion of spin-orbit coupling (SOC) versus scalar relativistic effects on the predicted spectra for heavy-element complexes. In this study, we employ a relativistic two-component Hamiltonian in the X2C form with all of the electrons in the system being considered explicitly to compare and contrast with previous studies that included the relativistic effects by means of relativistic effective core potentials (RECPs). A few uranium complexes are chosen as model systems. Comparison of the computed Cl K-edge X-ray absorption spectra with experimental data shows significantly improved agreement when a variational relativistic treatment of SOC is performed. In particular, we note the importance of SOC terms to obtain not only correct transition energies but also correct intensities for these heavy-element complexes because of the redistribution of ligand bonding character among the valence MOs. While RECPs generally agree well with all-electron scalar relativistic calculations, there are some differences in the predicted spectra of open-shell systems. These methods are still suitable for broad application to analyze the qualitative nature of transitions in X-ray absorption spectra, but caution is recommended for quantitative analysis, as SOC can be non-negligible for both open- and closed-shell heavy-element systems.
Collapse
Affiliation(s)
- Joseph M Kasper
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States.,Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States.,Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Stosh A Kozimor
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique R Batista
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| |
Collapse
|
8
|
Schacherl B, Joseph C, Lavrova P, Beck A, Reitz C, Prüssmann T, Fellhauer D, Lee JY, Dardenne K, Rothe J, Geckeis H, Vitova T. Paving the way for examination of coupled redox/solid-liquid interface reactions: 1 ppm Np adsorbed on clay studied by Np M5-edge HR-XANES spectroscopy. Anal Chim Acta 2022; 1202:339636. [DOI: 10.1016/j.aca.2022.339636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 02/06/2022] [Accepted: 02/17/2022] [Indexed: 11/01/2022]
|
9
|
Kvashnina KO, Butorin SM. High-energy resolution X-ray spectroscopy at actinide M 4,5 and ligand K edges: what we know, what we want to know, and what we can know. Chem Commun (Camb) 2022; 58:327-342. [PMID: 34874022 PMCID: PMC8725612 DOI: 10.1039/d1cc04851a] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/15/2021] [Indexed: 12/20/2022]
Abstract
In recent years, scientists have progressively recognized the role of electronic structures in the characterization of chemical properties for actinide containing materials. High-energy resolution X-ray spectroscopy at the actinide M4,5 edges emerged as a promising direction because this method can probe actinide properties at the atomic level through the possibility of reducing the experimental spectral width below the natural core-hole lifetime broadening. Parallel to the technical developments of the X-ray method and experimental discoveries, theoretical models, describing the observed electronic structure phenomena, have also advanced. In this feature article, we describe the latest progress in the field of high-energy resolution X-ray spectroscopy at the actinide M4,5 and ligand K edges and we show that the methods are able to (a) provide fingerprint information on the actinide oxidation state and ground state characters (b) probe 5f occupancy, non-stoichiometry, defects, and ligand/metal ratio and (c) investigate the local symmetry and effects of the crystal field. We discuss the chemical aspects of the electronic structure in terms familiar to chemists and materials scientists and conclude with a brief description of new opportunities and approaches to improve the experimental methodology and theoretical analysis for f-electron systems.
Collapse
Affiliation(s)
- Kristina O Kvashnina
- The Rossendorf Beamline at ESRF, The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France.
- Institute of Resource Ecology, Helmholtz Zentrum Dresden-Rossendorf (HZDR), PO Box 510119, 01314 Dresden, Germany
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Sergei M Butorin
- Condensed Matter Physics of Energy Materials, X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
| |
Collapse
|
10
|
Schacherl B, Prüssmann T, Dardenne K, Hardock K, Krepper V, Rothe J, Vitova T, Geckeis H. Implementation of cryogenic tender X-ray HR-XANES spectroscopy at the ACT station of the CAT-ACT beamline at the KIT Light Source. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:80-88. [PMID: 34985425 PMCID: PMC8733978 DOI: 10.1107/s1600577521012650] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/28/2021] [Indexed: 06/07/2023]
Abstract
The ACT experimental station of the CAT-ACT wiggler beamline at the Karlsruhe Institute of Technology (KIT) Light Source is dedicated to the investigation of radionuclide materials with radioactivities up to 1000000 times the exemption limit by various speciation techniques applying monochromatic X-rays. In this article, the latest technological developments at the ACT station that enable high-resolution X-ray absorption near-edge structure (HR-XANES) spectroscopy for low radionuclide loading samples are highlighted - encompassing the investigation of actinide elements down to 1 p.p.m. concentration - combined with a cryogenic sample environment reducing beam-induced sample alterations. One important part of this development is a versatile gas tight plexiglass encasement ensuring that all beam paths in the five-analyzer-crystal Johann-type X-ray emission spectrometer run within He atmosphere. The setup enables the easy exchange between different experiments (conventional X-ray absorption fine structure, HR-XANES, high-energy or wide-angle X-ray scattering, tender to hard X-ray spectroscopy) and opens up the possibility for the investigation of environmental samples, such as specimens containing transuranium elements from contaminated land sites or samples from sorption and diffusion experiments to mimic the far field of a breached nuclear waste repository.
Collapse
Affiliation(s)
- Bianca Schacherl
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tim Prüssmann
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Kathy Dardenne
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Kirsten Hardock
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Volker Krepper
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Jörg Rothe
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tonya Vitova
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Horst Geckeis
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| |
Collapse
|
11
|
Sergentu DC, Autschbach J. Covalency in Actinide(IV) Hexachlorides in Relation to Chlorine K-Edge X-ray Absorption Structure. Chem Sci 2022; 13:3194-3207. [PMID: 35414875 PMCID: PMC8926251 DOI: 10.1039/d1sc06454a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 02/03/2022] [Indexed: 12/02/2022] Open
Abstract
Chlorine K-edge X-ray absorption near edge structure (XANES) in actinideIV hexachlorides, [AnCl6]2− (An = Th–Pu), is calculated with relativistic multiconfiguration wavefunction theory (WFT). Of particular focus is a 3-peak feature emerging from U toward Pu, and its assignment in terms of donation bonding to the An 5f vs. 6d shells. With or without spin–orbit coupling, the calculated and previously measured XANES spectra are in excellent agreement with respect to relative peak positions, relative peak intensities, and peak assignments. Metal–ligand bonding analyses from WFT and Kohn–Sham theory (KST) predict comparable An 5f and 6d covalency from U to Np and Pu. Although some frontier molecular orbitals in the KST calculations display increasing An 5f–Cl 3p mixing from Th to Pu, because of energetic stabilization of 5f relative to the Cl 3p combinations of the matching symmetry, increasing hybridization is neither seen in the WFT natural orbitals, nor is it reflected in the calculated bond orders. The appearance of the pre-edge peaks from U to Pu and their relative intensities are rationalized simply by the energetic separation of transitions to 6d t2gversus transitions to weakly-bonded and strongly stabilized a2u, t2u and t1u orbitals with 5f character. The study highlights potential pitfalls when interpreting XANES spectra based on ground state Kohn–Sham molecular orbitals. Chlorine K-edge XANES of An(iv) hexachlorides, calculated with multiconfiguration wavefunction theory, is interpreted in terms of similar metal–ligand covalency along the An = Th–Pu series.![]()
Collapse
Affiliation(s)
- Dumitru-Claudiu Sergentu
- Department of Chemistry, University at Buffalo State University of New York Buffalo NY 14260-3000 USA
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo State University of New York Buffalo NY 14260-3000 USA
| |
Collapse
|
12
|
Pruessmann T, Nagel P, Simonelli L, Batchelor D, Gordon R, Schimmelpfennig B, Trumm M, Vitova T. Opportunities and challenges of applying advanced X-ray spectroscopy to actinide and lanthanide N-donor ligand systems. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:53-66. [PMID: 34985423 PMCID: PMC8733980 DOI: 10.1107/s1600577521012091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/12/2021] [Indexed: 06/14/2023]
Abstract
N-donor ligands such as n-Pr-BTP [2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine] preferentially bind trivalent actinides (An3+) over trivalent lanthanides (Ln3+) in liquid-liquid separation. However, the chemical and physical processes responsible for this selectivity are not yet well understood. Here, an explorative comparative X-ray spectroscopy and computational (L3-edge) study for the An/Ln L3-edge and the N K-edge of [An/Ln(n-Pr-BTP)3](NO3)3, [Ln(n-Pr-BTP)3](CF3SO3)3 and [Ln(n-Pr-BTP)3](ClO4)3 complexes is presented. High-resolution X-ray absorption near-edge structure (HR-XANES) L3-edge data reveal additional features in the pre- and post-edge range of the spectra that are investigated using the quantum chemical codes FEFF and FDMNES. X-ray Raman spectroscopy studies demonstrate the applicability of this novel technique for investigations of liquid samples of partitioning systems at the N K-edge.
Collapse
Affiliation(s)
- Tim Pruessmann
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Peter Nagel
- Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - Laura Simonelli
- ALBA Synchrotron Light Facility, Cerdanyola del Vallès 08290, Spain
| | - David Batchelor
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Robert Gordon
- PNCSRF, APS Sector 20, Argonne, IL 60439, USA
- Moyie Institute, Burnaby, BC, Canada
| | - Bernd Schimmelpfennig
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Michael Trumm
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tonya Vitova
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| |
Collapse
|
13
|
Polly R, Schacherl B, Rothe J, Vitova T. Relativistic Multiconfigurational Ab Initio Calculation of Uranyl 3d4f Resonant Inelastic X-ray Scattering. Inorg Chem 2021; 60:18764-18776. [PMID: 34818001 PMCID: PMC8693175 DOI: 10.1021/acs.inorgchem.1c02364] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Indexed: 11/27/2022]
Abstract
We applied relativistic multiconfigurational all-electron ab initio calculations including the spin-orbit interaction to calculate the 3d4f resonant inelastic X-ray scattering (RIXS) map (3d3/2 → 5f5/2 U M4 absorption edge and 4f5/2 → 3d3/2 U Mβ emission) of uranyl (UO22+). The calculated data are in excellent agreement with experimental results and allow a detailed understanding of the observed features and an unambiguous assignment of all involved intermediate and final states. The energies corresponding to the maxima of the resonant emission and the non-resonant (normal) emission were determined with high accuracy, and the corresponding X-ray absorption near edge structure spectra extracted at these two positions were simulated and agree well with the measured data. With the high quality of our theoretical data, we show that the cause of the splitting of the three main peaks in emission is due to the fine structure splitting of the 4f orbitals induced through the trans di-oxo bonds in uranyl and that we are able to obtain direct information about the energy differences between the 5f and 4f orbitals: Δ5f δ/ϕ - 4f δ/ϕ, Δ5f π* - 4f π, and Δ5f σ* - 4f σ from the 3d4f RIXS map. RIXS maps contain a wealth of information, and ab initio calculations facilitate an understanding of their complex structure in a clear and transparent way. With these calculations, we show that the multiconfigurational protocol, which is nowadays applied as a standard tool to study the X-ray spectra of transition metal complexes, can be extended to the calculation of RIXS maps of systems containing actinides.
Collapse
Affiliation(s)
- Robert Polly
- Karlsruher Institut für Technologie
(KIT), Institut für Nukleare Entsorgung
(INE), Campus Nord, Postfach
3640, 76021 Karlsruhe, Germany
| | - Bianca Schacherl
- Karlsruher Institut für Technologie
(KIT), Institut für Nukleare Entsorgung
(INE), Campus Nord, Postfach
3640, 76021 Karlsruhe, Germany
| | - Jörg Rothe
- Karlsruher Institut für Technologie
(KIT), Institut für Nukleare Entsorgung
(INE), Campus Nord, Postfach
3640, 76021 Karlsruhe, Germany
| | - Tonya Vitova
- Karlsruher Institut für Technologie
(KIT), Institut für Nukleare Entsorgung
(INE), Campus Nord, Postfach
3640, 76021 Karlsruhe, Germany
| |
Collapse
|
14
|
Sergentu DC, Gendron F, Walter ED, Park S, Capan C, Surbella RG, Soderquist CZ, Hall GB, Sinkov SI, Autschbach J, Cho H. Equatorial Electronic Structure in the Uranyl Ion: Cs 2UO 2Cl 4 and Cs 2UO 2Br 4. Inorg Chem 2021; 61:3821-3831. [PMID: 34817159 DOI: 10.1021/acs.inorgchem.1c02832] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electric field gradient (EFG) tensors in the equatorial plane of the linear UO22+ ion have been measured by nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) experiments and computed by relativistic Kohn-Sham methods with and without environment embedding for Cs2UO2Cl4 and Cs2UO2Br4. This approach expands the possibilities for probing the electronic structure in uranyl complexes beyond the strongly covalent U-O bonds. The combined analyses find that one of the two largest principal EFG tensor components at the halogen sites points along the U-X bond (X = Cl, Br), and the second is parallel to the UO22+ ion; in Cs2UO2Cl4, the components are nearly equal in magnitude, whereas in Cs2UO2Br4, due to short-range bromide-cesium interactions, the equatorial component is dominant for one pair of Br sites and the axial component is larger for the second pair. The directions and relative magnitudes of the field gradient principal axes are found to be sensitive to the σ and π electron donation by the ligands and the model of the environment. Chlorine-35 NQR spectra of 235U-depleted and 235U-enriched Cs2UO2Cl4 exhibited no uranium-isotope-dependent shift, but the resonance of the depleted sample displayed a 58% broader line width.
Collapse
Affiliation(s)
- Dumitru-Claudiu Sergentu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Frédéric Gendron
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Eric D Walter
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Sejun Park
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Cigdem Capan
- Washington State University, Richland, Washington 99354, United States
| | - R Gian Surbella
- National Security Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Chuck Z Soderquist
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Gabriel B Hall
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Sergey I Sinkov
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Herman Cho
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| |
Collapse
|
15
|
Amidani L, Retegan M, Volkova A, Popa K, Martin PM, Kvashnina KO. Probing the Local Coordination of Hexavalent Uranium and the Splitting of 5f Orbitals Induced by Chemical Bonding. Inorg Chem 2021; 60:16286-16293. [PMID: 34677932 DOI: 10.1021/acs.inorgchem.1c02107] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report here a detailed experimental and theoretical investigation of hexavalent uranium in various local configurations with a high-energy-resolution fluorescence-detected X-ray absorption near-edge structure at the U M4 edge. We show the pronounced sensitivity of the technique to the arrangement of atoms around the absorber and provide a detailed theoretical interpretation revealing the nature of spectral features. Calculations based on density functional theory and on crystal field multiplet theory indicate that for all local configurations analyzed, the main peak corresponds to nonbonding 5f orbitals, and the highest energy peak corresponds to antibonding 5f orbitals. Our findings agree with the accepted interpretation of uranyl spectral features and embed the latter in a broader field of view, which interprets the spectra of a large variety of U6+-containing samples on a common theoretical ground.
Collapse
Affiliation(s)
- Lucia Amidani
- The Rossendorf Beamline at ESRF, The European Synchrotron, 38043 Grenoble Cedex 9, France.,Institute of Resource Ecology, Helmholtz Zentrum Dresden-Rossendorf (HZDR), P.O. Box 510119, 01314 Dresden, Germany
| | - Marius Retegan
- ESRF-The European Synchrotron, 38043 Grenoble Cedex 9, France
| | - Anna Volkova
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Karin Popa
- European Commission, Joint Research Centre, Nuclear Safety and Security Directorate, Karlsruhe 76344, Germany
| | - Philippe M Martin
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Kristina O Kvashnina
- The Rossendorf Beamline at ESRF, The European Synchrotron, 38043 Grenoble Cedex 9, France.,Institute of Resource Ecology, Helmholtz Zentrum Dresden-Rossendorf (HZDR), P.O. Box 510119, 01314 Dresden, Germany.,Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| |
Collapse
|
16
|
Boulanger N, Kuzenkova AS, Iakunkov A, Romanchuk AY, Trigub AL, Egorov AV, Bauters S, Amidani L, Retegan M, Kvashnina KO, Kalmykov SN, Talyzin AV. Enhanced Sorption of Radionuclides by Defect-Rich Graphene Oxide. ACS APPLIED MATERIALS & INTERFACES 2020; 12:45122-45135. [PMID: 32902246 PMCID: PMC7684581 DOI: 10.1021/acsami.0c11122] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
Extremely defect graphene oxide (dGO) is proposed as an advanced sorbent for treatment of radioactive waste and contaminated natural waters. dGO prepared using a modified Hummers oxidation procedure, starting from reduced graphene oxide (rGO) as a precursor, shows significantly higher sorption of U(VI), Am(III), and Eu(III) than standard graphene oxides (GOs). Earlier studies revealed the mechanism of radionuclide sorption related to defects in GO sheets. Therefore, explosive thermal exfoliation of graphite oxide was used to prepare rGO with a large number of defects and holes. Defects and holes are additionally introduced by Hummers oxidation of rGO, thus providing an extremely defect-rich material. Analysis of characterization by XPS, TGA, and FTIR shows that dGO oxygen functionalization is predominantly related to defects, such as flake edges and edge atoms of holes, whereas standard GO exhibits oxygen functional groups mostly on the planar surface. The high abundance of defects in dGO results in a 15-fold increase in sorption capacity of U(VI) compared to that in standard Hummers GO. The improved sorption capacity of dGO is related to abundant carboxylic group attached hole edge atoms of GO flakes as revealed by synchrotron-based extended X-ray absorption fine structure (EXAFS) and high-energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) spectroscopy.
Collapse
Affiliation(s)
| | - Anastasiia S. Kuzenkova
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
| | - Artem Iakunkov
- Department
of Physics, Umeå University, S-90187 Umeå, Sweden
| | - Anna Yu. Romanchuk
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
| | - Alexander L. Trigub
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
- National
Research Centre “Kurchatov Institute”, Moscow 123098, Russia
| | - Alexander V. Egorov
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
| | - Stephen Bauters
- The
Rossendorf Beamline at ESRF − The
European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
- Helmholtz
Zentrum Dresden-Rossendorf (HZDR), Institute
of Resource Ecology, P. O. Box 510119, 01314 Dresden, Germany
| | - Lucia Amidani
- The
Rossendorf Beamline at ESRF − The
European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
- Helmholtz
Zentrum Dresden-Rossendorf (HZDR), Institute
of Resource Ecology, P. O. Box 510119, 01314 Dresden, Germany
| | - Marius Retegan
- The
European
Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
| | - Kristina O. Kvashnina
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
- The
Rossendorf Beamline at ESRF − The
European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
- Helmholtz
Zentrum Dresden-Rossendorf (HZDR), Institute
of Resource Ecology, P. O. Box 510119, 01314 Dresden, Germany
| | - Stepan N. Kalmykov
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
| | | |
Collapse
|
17
|
Ditter AS, Holden WM, Cary SK, Mocko V, Latimer MJ, Nelson EJ, Kozimor SA, Seidler GT. Resonant inelastic X-ray scattering using a miniature dispersive Rowland refocusing spectrometer. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:446-454. [PMID: 32153283 PMCID: PMC7064111 DOI: 10.1107/s1600577520001022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 01/25/2020] [Indexed: 06/07/2023]
Abstract
X-ray absorption spectroscopy (XAS) beamlines worldwide are steadily increasing their emphasis on full photon-in/photon-out spectroscopies, such as resonant inelastic X-ray scattering (RIXS), resonant X-ray emission spectroscopy (RXES) and high energy resolution fluorescence detection XAS (HERFD-XAS). In such cases, each beamline must match the choice of emission spectrometer to the scientific mission of its users. Previous work has recently reported a miniature tender X-ray spectrometer using a dispersive Rowland refocusing (DRR) geometry that functions with high energy resolution even with a large X-ray spot size on the sample [Holden et al. (2017). Rev. Sci. Instrum. 88, 073904]. This instrument has been used in the laboratory in multiple studies of non-resonant X-ray emission spectroscopy using a conventional X-ray tube, though only for preliminary measurements at a low-intensity microfocus synchrotron beamline. This paper reports an extensive study of the performance of a miniature DRR spectrometer at an unfocused wiggler beamline, where the incident monochromatic flux allows for resonant studies which are impossible in the laboratory. The results support the broader use of the present design and also suggest that the DRR method with an unfocused beam could have important applications for materials with low radiation damage thresholds and that would not survive analysis on focused beamlines.
Collapse
Affiliation(s)
- Alexander S. Ditter
- Department of Physics, University of Washington, PO Box 351650, Seattle, WA 98195-1560, USA
- C-IIAC, Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA
| | - William M. Holden
- Department of Physics, University of Washington, PO Box 351650, Seattle, WA 98195-1560, USA
| | - Samantha K. Cary
- C-IIAC, Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA
| | - Veronika Mocko
- C-IIAC, Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA
| | - Matthew J. Latimer
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Erik J. Nelson
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Stosh A. Kozimor
- C-IIAC, Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA
| | - Gerald T. Seidler
- Department of Physics, University of Washington, PO Box 351650, Seattle, WA 98195-1560, USA
| |
Collapse
|
18
|
Platts JA, Baker RJ. A computational investigation of orbital overlap versus energy degeneracy covalency in [UE2]2+ (E = O, S, Se, Te) complexes. Dalton Trans 2020; 49:1077-1088. [DOI: 10.1039/c9dt04484a] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covalency in analogues of uranyl with heavy chalcogens is explored using DFT, and traced to increased energy-degeneracy as the group is descended.
Collapse
Affiliation(s)
| | - Robert J. Baker
- School of Chemistry
- University of Dublin
- Trinity College
- Dublin 2
- Ireland
| |
Collapse
|
19
|
Vitova T, Pidchenko I, Schild D, Prüßmann T, Montoya V, Fellhauer D, Gaona X, Bohnert E, Rothe J, Baker RJ, Geckeis H. Competitive Reaction of Neptunium(V) and Uranium(VI) in Potassium–Sodium Carbonate-Rich Aqueous Media: Speciation Study with a Focus on High-Resolution X-ray Spectroscopy. Inorg Chem 2019; 59:8-22. [DOI: 10.1021/acs.inorgchem.9b02463] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tonya Vitova
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | - Ivan Pidchenko
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | - Dieter Schild
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | - Tim Prüßmann
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | - Vanessa Montoya
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | - David Fellhauer
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | - Xavier Gaona
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | - Elke Bohnert
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| | | | - Robert J. Baker
- School of Chemistry, University of Dublin, Trinity College, Dublin 2, Ireland
| | - Horst Geckeis
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, P.O. 3640, D-76021 Karlsruhe, Germany
| |
Collapse
|
20
|
Zegke M, Zhang X, Pidchenko I, Hlina JA, Lord RM, Purkis J, Nichol GS, Magnani N, Schreckenbach G, Vitova T, Love JB, Arnold PL. Differential uranyl(v) oxo-group bonding between the uranium and metal cations from groups 1, 2, 4, and 12; a high energy resolution X-ray absorption, computational, and synthetic study. Chem Sci 2019; 10:9740-9751. [PMID: 32055343 PMCID: PMC6993744 DOI: 10.1039/c8sc05717f] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 08/26/2019] [Indexed: 11/21/2022] Open
Abstract
Uranyl Pacman takes them all: the bonding of s- and d-block cations to uranyl is compared by experiment, spectroscopy and theory.
The uranyl(vi) ‘Pacman’ complex [(UO2)(py)(H2L)] A (L = polypyrrolic Schiff-base macrocycle) is reduced by Cp2Ti(η2-Me3SiC
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
CSiMe3) and [Cp2TiCl]2 to oxo-titanated uranyl(v) complexes [(py)(Cp2TiIIIOUO)(py)(H2L)] 1 and [(ClCp2TiIVOUO)(py)(H2L)] 2. Combination of ZrII and ZrIV synthons with A yields the first ZrIV–uranyl(v) complex, [(ClCp2ZrOUO)(py)(H2L)] 3. Similarly, combinations of Ae0 and AeII synthons (Ae = alkaline earth) afford the mono-oxo metalated uranyl(v) complexes [(py)2(ClMgOUO)(py)(H2L)] 4, [(py)2(thf)2(ICaOUO)(py) (H2L)] 5; the zinc complexes [(py)2(XZnOUO)(py)(H2L)] (X = Cl 6, I 7) are formed in a similar manner. In contrast, the direct reactions of Rb or Cs metal with A generate the first mono-rubidiated and mono-caesiated uranyl(v) complexes; monomeric [(py)3(RbOUO)(py)(H2L)] 8 and hexameric [(MOUO)(py)(H2L)]6 (M = Rb 8b or Cs 9). In these uranyl(v) complexes, the pyrrole N–H atoms show strengthened hydrogen-bonding interactions with the endo-oxos, classified computationally as moderate-strength hydrogen bonds. Computational DFT MO (density functional theory molecular orbital) and EDA (energy decomposition analysis), uranium M4 edge HR-XANES (High Energy Resolution X-ray Absorption Near Edge Structure) and 3d4f RIXS (Resonant Inelastic X-ray Scattering) have been used (the latter two for the first time for uranyl(v) in 7 (ZnI)) to compare the covalent character in the UV–O and O–M bonds and show the 5f orbitals in uranyl(vi) complex A are unexpectedly more delocalised than in the uranyl(v) 7 (ZnI) complex. The Oexo–Zn bonds have a larger covalent contribution compared to the Mg–Oexo/Ca–Oexo bonds, and more covalency is found in the U–Oexo bond in 7 (ZnI), in agreement with the calculations.
Collapse
Affiliation(s)
- Markus Zegke
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh EH9 3FJ , UK . ; ; ; Tel: +44(0) 130 650 5429
| | - Xiaobin Zhang
- Department of Chemistry , University of Manitoba , Winnipeg , MB R3T 2N2 , Canada . ; ; Tel: +1-204-474-6261
| | - Ivan Pidchenko
- Institute for Nuclear Waste Disposal (INE) , Karlsruhe Institute of Technology (KIT) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
| | - Johann A Hlina
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh EH9 3FJ , UK . ; ; ; Tel: +44(0) 130 650 5429
| | - Rianne M Lord
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh EH9 3FJ , UK . ; ; ; Tel: +44(0) 130 650 5429
| | - Jamie Purkis
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh EH9 3FJ , UK . ; ; ; Tel: +44(0) 130 650 5429
| | - Gary S Nichol
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh EH9 3FJ , UK . ; ; ; Tel: +44(0) 130 650 5429
| | - Nicola Magnani
- Institute for Transuranium Elements , Joint Research Centre , European Commission , PO Box 2340 , 76125 Karlsruhe , Germany
| | - Georg Schreckenbach
- Department of Chemistry , University of Manitoba , Winnipeg , MB R3T 2N2 , Canada . ; ; Tel: +1-204-474-6261
| | - Tonya Vitova
- Institute for Nuclear Waste Disposal (INE) , Karlsruhe Institute of Technology (KIT) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
| | - Jason B Love
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh EH9 3FJ , UK . ; ; ; Tel: +44(0) 130 650 5429
| | - Polly L Arnold
- EaStCHEM School of Chemistry , The University of Edinburgh , David Brewster Road , Edinburgh EH9 3FJ , UK . ; ; ; Tel: +44(0) 130 650 5429
| |
Collapse
|
21
|
Fifteen Years of Radionuclide Research at the KIT Synchrotron Source in the Context of the Nuclear Waste Disposal Safety Case. GEOSCIENCES 2019. [DOI: 10.3390/geosciences9020091] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
For more than 120 years, systematic studies of X-ray interaction with matter have been the basis for our understanding of materials—both of natural or man-made origin—and their structure-function relationships. Beginning with simple radiographic imaging at the end of the 19th century, X-ray based analytical tools such as X-ray diffraction, X-ray fluorescence and photoemission or X-ray absorption techniques are indispensable in almost any field of chemical and material sciences—including basic and applied actinide and radionuclide studies. The advent of dedicated synchrotron radiation (SR) sources in the second half of the last century has revolutionized the analytical power of X-ray probes, while—with increasing number of SR facilities—beamline instrumentation followed a trend towards increasing specialization and adaption to a major research topic. The INE-Beamline and ACT station at the KIT synchrotron source belong to the exclusive club of a few synchrotron beamline facilities—mostly located in Europe—dedicated to the investigation of highly radioactive materials. Since commissioning of the INE-Beamline in 2005, capabilities for synchrotron-based radionuclide and actinide sciences at KIT have been continuously expanded, driven by in-house research programs and external user needs.
Collapse
|
22
|
Tondreau AM, Duignan TJ, Stein BW, Fleischauer VE, Autschbach J, Batista ER, Boncella JM, Ferrier MG, Kozimor SA, Mocko V, Neidig ML, Cary SK, Yang P. A Pseudotetrahedral Uranium(V) Complex. Inorg Chem 2018; 57:8106-8115. [DOI: 10.1021/acs.inorgchem.7b03139] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aaron M. Tondreau
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Thomas J. Duignan
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Benjamin W. Stein
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Valerie E. Fleischauer
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Enrique R. Batista
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - James M. Boncella
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Maryline G. Ferrier
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Stosh A. Kozimor
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Veronika Mocko
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Michael L. Neidig
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Samantha K. Cary
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| |
Collapse
|
23
|
Vitova T, Pidchenko I, Biswas S, Beridze G, Dunne PW, Schild D, Wang Z, Kowalski PM, Baker RJ. Dehydration of the Uranyl Peroxide Studtite, [UO2(η2-O2)(H2O)2]·2H2O, Affords a Drastic Change in the Electronic Structure: A Combined X-ray Spectroscopic and Theoretical Analysis. Inorg Chem 2018; 57:1735-1743. [DOI: 10.1021/acs.inorgchem.7b02326] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tonya Vitova
- Institute for Nuclear Waste Disposal (INE), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Ivan Pidchenko
- Institute for Nuclear Waste Disposal (INE), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Saptarshi Biswas
- School
of Chemistry, University of Dublin, Trinity College, College Green, Dublin 2, Ireland
| | - George Beridze
- Institute of Energy and Climate Research,
IEK-6, Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse, 52428 Jülich, Germany
- JARA High-Performance Computing, Schinkelstrasse 2, 52062 Aachen, Germany
| | - Peter W. Dunne
- School
of Chemistry, University of Dublin, Trinity College, College Green, Dublin 2, Ireland
| | - Dieter Schild
- Institute for Nuclear Waste Disposal (INE), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Zheming Wang
- Pacific Northwest National Laboratory, MSIN K8-96, P.O. Box 999, Richland, Washington 99352, United States
| | - Piotr M. Kowalski
- Institute of Energy and Climate Research,
IEK-6, Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse, 52428 Jülich, Germany
- JARA High-Performance Computing, Schinkelstrasse 2, 52062 Aachen, Germany
| | - Robert J. Baker
- School
of Chemistry, University of Dublin, Trinity College, College Green, Dublin 2, Ireland
| |
Collapse
|
24
|
Vitova T, Pidchenko I, Fellhauer D, Pruessmann T, Bahl S, Dardenne K, Yokosawa T, Schimmelpfennig B, Altmaier M, Denecke M, Rothe J, Geckeis H. Exploring the electronic structure and speciation of aqueous and colloidal Pu with high energy resolution XANES and computations. Chem Commun (Camb) 2018; 54:12824-12827. [DOI: 10.1039/c8cc06889e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pu L3 HR-XANES fingerprints loss of inversion symmetry: rising pre-edge (d,e), shorter A–B distance (d,e), split Pu d-DOS (e).
Collapse
|
25
|
Zimina A, Dardenne K, Denecke MA, Doronkin DE, Huttel E, Lichtenberg H, Mangold S, Pruessmann T, Rothe J, Spangenberg T, Steininger R, Vitova T, Geckeis H, Grunwaldt JD. CAT-ACT-A new highly versatile x-ray spectroscopy beamline for catalysis and radionuclide science at the KIT synchrotron light facility ANKA. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:113113. [PMID: 29195371 DOI: 10.1063/1.4999928] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
CAT-ACT-the hard X-ray beamline for CATalysis and ACTinide/radionuclide research at the KIT synchrotron radiation facility ANKA-is dedicated to X-ray spectroscopy, including "flux hungry" photon-in/photon-out and correlative techniques and combines state-of-the-art optics with a unique infrastructure for radionuclide and catalysis research. Measurements can be performed at photon energies varying between 3.4 keV and 55 keV, thus encompassing the actinide M- and L-edge or potassium K-edge up to the K-edges of the lanthanide series such as cerium. Well-established X-ray absorption fine structure spectroscopy in transmission and fluorescence detection modes is available in combination with high energy-resolution X-ray emission spectroscopy or X-ray diffraction techniques. The modular beamline design with two alternately operated in-line experimental stations enables sufficient flexibility to adapt sample environments and detection systems to many scientific challenges. The ACT experimental station focuses on various aspects of nuclear waste disposal within the mission of the Helmholtz association to contribute to the solution of one of the greatest scientific and social challenges of our time-the safe disposal of heat producing, highly radioactive waste forms from nuclear energy production. It augments present capabilities at the INE-Beamline by increasing the flux and extending the energy range into the hard X-ray regime. The CAT experimental station focuses on catalytic materials, e.g., for energy-related and exhaust gas catalysis. Characterization of catalytically active materials under realistic reaction conditions and the development of in situ and operando cells for sample environments close to industrial reactors are essential aspects at CAT.
Collapse
Affiliation(s)
- A Zimina
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - K Dardenne
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - M A Denecke
- The University of Manchester, Dalton Nuclear Institute, Manchester, United Kingdom
| | - D E Doronkin
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - E Huttel
- Institute for Beam Physics and Technology (IBPT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - H Lichtenberg
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - S Mangold
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - T Pruessmann
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - J Rothe
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - Th Spangenberg
- Institute for Beam Physics and Technology (IBPT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - R Steininger
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - T Vitova
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - H Geckeis
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - J-D Grunwaldt
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| |
Collapse
|
26
|
Bahl S, Peuget S, Pidchenko I, Pruessmann T, Rothe J, Dardenne K, Delrieu J, Fellhauer D, Jégou C, Geckeis H, Vitova T. Pu Coexists in Three Oxidation States in a Borosilicate Glass: Implications for Pu Solubility. Inorg Chem 2017; 56:13982-13990. [PMID: 29087699 DOI: 10.1021/acs.inorgchem.7b02118] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pu(III), Pu(IV), and a higher oxidation state of Pu, likely Pu(VI), are for the first time characterized simultaneously present in a borosilicate glass using Pu M5 edge high energy resolution X-ray absorption near edge structure (HR-XANES) technique. We illustrate that the method can be very efficiently used to determine Pu oxidation states, which control the solubility limit of Pu in a glass matrix. HR-XANES results show that the addition of excess Si3N4 is not sufficient for complete reduction of Pu to Pu(III), which has a relatively high solubility limit (9-22 wt % Pu) due to its network-modifying behavior in glasses. We provide evidence that the initially added Pu(VI) might be partly preserved during vitrification at 1200/1400 °C in Ar atmosphere. Pu(VI) could be very advantageous for vitrification of Pu-rich wastes, since it might reach solubility limits of 40 wt % comparable to U(VI).
Collapse
Affiliation(s)
- Sebastian Bahl
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Sylvain Peuget
- Institut de Chimie Séparative de Marcoule, CEA Valrhô Marcoule, UMR 5257 , BP 17171, 30207 Bagnols-sur-Cèze, France
| | - Ivan Pidchenko
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Tim Pruessmann
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Jörg Rothe
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Kathy Dardenne
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Julien Delrieu
- Institut de Chimie Séparative de Marcoule, CEA Valrhô Marcoule, UMR 5257 , BP 17171, 30207 Bagnols-sur-Cèze, France
| | - David Fellhauer
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Christophe Jégou
- Institut de Chimie Séparative de Marcoule, CEA Valrhô Marcoule, UMR 5257 , BP 17171, 30207 Bagnols-sur-Cèze, France
| | - Horst Geckeis
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Tonya Vitova
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe, Germany
| |
Collapse
|
27
|
Vitova T, Pidchenko I, Fellhauer D, Bagus PS, Joly Y, Pruessmann T, Bahl S, Gonzalez-Robles E, Rothe J, Altmaier M, Denecke MA, Geckeis H. The role of the 5f valence orbitals of early actinides in chemical bonding. Nat Commun 2017; 8:16053. [PMID: 28681848 PMCID: PMC5504295 DOI: 10.1038/ncomms16053] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 05/24/2017] [Indexed: 12/22/2022] Open
Abstract
One of the long standing debates in actinide chemistry is the level of localization and participation of the actinide 5f valence orbitals in covalent bonds across the actinide series. Here we illuminate the role of the 5f valence orbitals of uranium, neptunium and plutonium in chemical bonding using advanced spectroscopies: actinide M4,5 HR-XANES and 3d4f RIXS. Results reveal that the 5f orbitals are active in the chemical bonding for uranium and neptunium, shown by significant variations in the level of their localization evidenced in the spectra. In contrast, the 5f orbitals of plutonium appear localized and surprisingly insensitive to different bonding environments. We envisage that this report of using relative energy differences between the 5fδ/φ and 5fπ*/5fσ* orbitals as a qualitative measure of overlap-driven actinyl bond covalency will spark activity, and extend to numerous applications of RIXS and HR-XANES to gain new insights into the electronic structures of the actinide elements.
Collapse
Affiliation(s)
- T. Vitova
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - I. Pidchenko
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - D. Fellhauer
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - P. S. Bagus
- Department of Chemistry, University of North Texas, Denton, Texas 76203-5017, USA
| | - Y. Joly
- University Grenoble Alpes, Inst NEEL, F-38042 Grenoble, France
- CNRS, Inst NEEL, F-38042 Grenoble, France
| | - T. Pruessmann
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - S. Bahl
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - E. Gonzalez-Robles
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - J. Rothe
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - M. Altmaier
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - M. A. Denecke
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| | - H. Geckeis
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. 3640, D-76021 Karlsruhe, Germany
| |
Collapse
|
28
|
Cross JN, Su J, Batista ER, Cary SK, Evans WJ, Kozimor SA, Mocko V, Scott BL, Stein BW, Windorff CJ, Yang P. Covalency in Americium(III) Hexachloride. J Am Chem Soc 2017; 139:8667-8677. [DOI: 10.1021/jacs.7b03755] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Justin N. Cross
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Jing Su
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique R. Batista
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Samantha K. Cary
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - William J. Evans
- University of California, Irvine, California 92697-2025, United States
| | - Stosh A. Kozimor
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Veronika Mocko
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brian L. Scott
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Benjamin W. Stein
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Cory J. Windorff
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
- University of California, Irvine, California 92697-2025, United States
| | - Ping Yang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| |
Collapse
|
29
|
Pidchenko I, Kvashnina KO, Yokosawa T, Finck N, Bahl S, Schild D, Polly R, Bohnert E, Rossberg A, Göttlicher J, Dardenne K, Rothe J, Schäfer T, Geckeis H, Vitova T. Uranium Redox Transformations after U(VI) Coprecipitation with Magnetite Nanoparticles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2217-2225. [PMID: 28094921 DOI: 10.1021/acs.est.6b04035] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Uranium redox states and speciation in magnetite nanoparticles coprecipitated with U(VI) for uranium loadings varying from 1000 to 10 000 ppm are investigated by X-ray absorption spectroscopy (XAS). It is demonstrated that the U M4 high energy resolution X-ray absorption near edge structure (HR-XANES) method is capable to clearly characterize U(IV), U(V), and U(VI) existing simultaneously in the same sample. The contributions of the three different uranium redox states are quantified with the iterative transformation factor analysis (ITFA) method. U L3 XAS and transmission electron microscopy (TEM) reveal that initially sorbed U(VI) species recrystallize to nonstoichiometric UO2+x nanoparticles within 147 days when stored under anoxic conditions. These U(IV) species oxidize again when exposed to air. U M4 HR-XANES data demonstrate strong contribution of U(V) at day 10 and that U(V) remains stable over 142 days under ambient conditions as shown for magnetite nanoparticles containing 1000 ppm U. U L3 XAS indicates that this U(V) species is protected from oxidation likely incorporated into octahedral magnetite sites. XAS results are supported by density functional theory (DFT) calculations. Further characterization of the samples include powder X-ray diffraction (pXRD), scanning electron microscopy (SEM) and Fe 2p X-ray photoelectron spectroscopy (XPS).
Collapse
Affiliation(s)
- Ivan Pidchenko
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Kristina O Kvashnina
- European Synchrotron Radiation Facility (ESRF) , CS40220, 38043 Grenoble Cedex 9, France
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology , P.O. Box 510119, D-01314 Dresden, Germany
| | - Tadahiro Yokosawa
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Nicolas Finck
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Sebastian Bahl
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Dieter Schild
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Robert Polly
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Elke Bohnert
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - André Rossberg
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology , P.O. Box 510119, D-01314 Dresden, Germany
| | - Jörg Göttlicher
- Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation (IPS) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Kathy Dardenne
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Jörg Rothe
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Thorsten Schäfer
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Horst Geckeis
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Tonya Vitova
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, D-76021 Karlsruhe, Germany
| |
Collapse
|
30
|
Zimina A, Dardenne K, Denecke MA, Grunwaldt JD, Huttel E, Lichtenberg H, Mangold S, Pruessmann T, Rothe J, Steininger R, Vitova T. The CAT-ACT Beamline at ANKA: A new high energy X-ray spectroscopy facility for CATalysis and ACTinide research. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/712/1/012019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
31
|
La Pierre HS, Rosenzweig M, Kosog B, Hauser C, Heinemann FW, Liddle ST, Meyer K. Charge control of the inverse trans-influence. Chem Commun (Camb) 2015; 51:16671-4. [PMID: 26430823 DOI: 10.1039/c5cc07211e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of uranium(VI) mono(imido) complexes, by the oxidation of corresponding uranium(V) species, are presented. These experimental results, paired with DFT analyses, allow for the comparison of the electronic structure of uranium(VI) mono(oxo) and mono(imido) ligands within a conserved ligand framework and demonstrate that the magnitude of the ground state stabilization derived from the inverse trans-influence (ITI) is governed by the relative charge localization on the multiply bonded atom or group.
Collapse
Affiliation(s)
- Henry S La Pierre
- Friedrich-Alexander-University of Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Inorganic Chemistry, Egerlandstr. 1, 91058 Erlangen, Germany.
| | | | | | | | | | | | | |
Collapse
|
32
|
Kvashnina KO, Kvashnin YO, Vegelius JR, Bosak A, Martin PM, Butorin SM. Sensitivity to Actinide Doping of Uranium Compounds by Resonant Inelastic X-ray Scattering at Uranium L3 Edge. Anal Chem 2015; 87:8772-80. [DOI: 10.1021/acs.analchem.5b01699] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kristina O. Kvashnina
- European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043, Grenoble, France
| | - Yaroslav O. Kvashnin
- European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043, Grenoble, France
- Department
of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
| | - Johan R. Vegelius
- Department
of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
| | - Alexei Bosak
- European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043, Grenoble, France
| | | | - Sergei M. Butorin
- Department
of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
| |
Collapse
|