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Dumas T, Guillaumont D, Fillaux C, Scheinost A, Moisy P, Petit S, Shuh DK, Tyliszczak T, Den Auwer C. The nature of chemical bonding in actinide and lanthanide ferrocyanides determined by X-ray absorption spectroscopy and density functional theory. Phys Chem Chem Phys 2016; 18:2887-95. [PMID: 26733312 DOI: 10.1039/c5cp05820a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The electronic properties of actinide cations are of fundamental interest to describe intramolecular interactions and chemical bonding in the context of nuclear waste reprocessing or direct storage. The 5f and 6d orbitals are the first partially or totally vacant states in these elements, and the nature of the actinide ligand bonds is related to their ability to overlap with ligand orbitals. Because of its chemical and orbital selectivities, X-ray absorption spectroscopy (XAS) is an effective probe of actinide species frontier orbitals and for understanding actinide cation reactivity toward chelating ligands. The soft X-ray probes of the light elements provide better resolution than actinide L3-edges to obtain electronic information from the ligand. Thus coupling simulations to experimental soft X-ray spectral measurements and complementary quantum chemical calculations yields quantitative information on chemical bonding. In this study, soft X-ray XAS at the K-edges of C and N, and the L2,3-edges of Fe was used to investigate the electronic structures of the well-known ferrocyanide complexes K4Fe(II)(CN)6, thorium hexacyanoferrate Th(IV)Fe(II)(CN)6, and neodymium hexacyanoferrate KNd(III)Fe(II)(CN)6. The soft X-ray spectra were simulated based on quantum chemical calculations. Our results highlight the orbital overlapping effects and atomic effective charges in the Fe(II)(CN)6 building block. In addition to providing a detailed description of the electronic structure of the ferrocyanide complex (K4Fe(II)(CN)6), the results strongly contribute to confirming the actinide 5f and 6d orbital oddity in comparison to lanthanide 4f and 5d.
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Affiliation(s)
- Thomas Dumas
- CEA, Nuclear Energy Division, Radiochemistry and Process Department, 30207 Bagnols-sur-Cèze, France.
| | - Dominique Guillaumont
- CEA, Nuclear Energy Division, Radiochemistry and Process Department, 30207 Bagnols-sur-Cèze, France.
| | - Clara Fillaux
- CEA, Nuclear Energy Division, Radiochemistry and Process Department, 30207 Bagnols-sur-Cèze, France.
| | | | - Philippe Moisy
- CEA, Nuclear Energy Division, Radiochemistry and Process Department, 30207 Bagnols-sur-Cèze, France.
| | - Sébastien Petit
- CEA, Nuclear Energy Division, Radiochemistry and Process Department, 30207 Bagnols-sur-Cèze, France.
| | - David K Shuh
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Tolek Tyliszczak
- Advanced Light Source Division, Lawrence Berkeley National Laboratory, LBNL, Berkeley, CA 94720, USA
| | - Christophe Den Auwer
- CEA, Nuclear Energy Division, Radiochemistry and Process Department, 30207 Bagnols-sur-Cèze, France. and University of Nice Sophia Antipolis, Nice Chemistry Institute, UMR 7272, 06108 Nice, France
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Pecheur O, Guillaumont D, Dourdain S, Berthon L, Turgis R, Fillaux C, Arrachart G, Testard F. Uranium Extraction by a Bifunctional Amido-Phosphonic Acid: Coordination Structure and Aggregation. Solvent Extraction and Ion Exchange 2016. [DOI: 10.1080/07366299.2016.1169146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Dumas T, Charbonnel MC, Charushnikova IA, Conradson SD, Fillaux C, Hennig C, Moisy P, Petit S, Scheinost AC, Shuh DK, Tyliszczak T, Auwer CD. Multi-edge X-ray absorption spectroscopy of thorium, neptunium and plutonium hexacyanoferrate compounds. NEW J CHEM 2013. [DOI: 10.1039/c3nj00318c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Fillaux C, Guillaumont D, Berthet JC, Copping R, Shuh DK, Tyliszczak T, Auwer CD. Investigating the electronic structure and bonding in uranyl compounds by combining NEXAFS spectroscopy and quantum chemistry. Phys Chem Chem Phys 2010; 12:14253-62. [DOI: 10.1039/c0cp00386g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Lozano JM, Clark DL, Conradson SD, Den Auwer C, Fillaux C, Guilaumont D, Webster Keogh D, Mustre de Leon J, Palmer PD, Simoni E. Influence of the local atomic structure in the X-ray absorption near edge spectroscopy of neptunium oxo ions. Phys Chem Chem Phys 2009; 11:10396-402. [DOI: 10.1039/b911731h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Poger D, Fillaux C, Miras R, Crouzy S, Delangle P, Mintz E, Den Auwer C, Ferrand M. Interplay between glutathione, Atx1 and copper: X-ray absorption spectroscopy determination of Cu(I) environment in an Atx1 dimer. J Biol Inorg Chem 2008; 13:1239-48. [PMID: 18704523 DOI: 10.1007/s00775-008-0408-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2008] [Accepted: 07/05/2008] [Indexed: 01/18/2023]
Abstract
X-ray absorption techniques have been used to characterise the primary coordination sphere of Cu(I) bound to glutathionate (GS-), to Atx1 and in Cu2I(GS-)2(Atx1)2, a complex recently proposed as the major form of Atx1 in the cytosol. In each complex, Cu(I) was shown to be triply coordinated. When only glutathione is provided, each Cu(I) is triply coordinated by sulphur atoms in the binuclear complex CuI2(GS-)5, involving bridging and terminal thiolates. In the presence of Atx1 and excess of glutathione, under conditions where CuI2(GS-)2(Atx1)2 is formed, each Cu(I) is triply coordinated by sulphur atoms. Given these constraints, there are two different ways for Cu(I) to bridge the Atx1 dimer: either both Cu(I) ions contribute to bridging the dimer, or only one Cu(I) ion is responsible for bridging, the other one being coordinated to two glutathione molecules. These two models are discussed as regards Cu(I) transfer to Ccc2a.
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Affiliation(s)
- David Poger
- CNRS Laboratoire de Chimie et Biologie des Métaux, UMR 5249, 17 rue des Martyrs, 38054, Grenoble, France
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Le Naour C, Trubert D, Di Giandomenico MV, Fillaux C, Den Auwer C, Moisy P, Hennig C. First Structural Characterization of a Protactinium(V) Single Oxo Bond in Aqueous Media. Inorg Chem 2005; 44:9542-6. [PMID: 16323942 DOI: 10.1021/ic0512330] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The present work describes the first structural studies of protactinium(V) in sulfuric and hydrofluoric acid media using X-ray absorption spectroscopy. The results show unambiguously the absence of the trans-dioxo bond that characterizes the other early actinide elements such as U and Np. In concentrated sulfuric acid (13 M), Pa(V) is proved to exhibit a single oxo bond as postulated in the literature for species in more dilute media. In a 0.5 M HF medium, XANES and EXAFS spectra indicate the absence of any oxo bond: Pa(V) exists in the form of a pure fluoro complex.
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Affiliation(s)
- Claire Le Naour
- Centre National de la Recherche Scientifique/IN2P3/Paris XI, Institut de Physique Nucléaire, 91406 Orsay Cedex, France
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