1
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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.
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2
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Löffler ST, Hümmer J, Scheurer A, Heinemann FW, Meyer K. Unprecedented pairs of uranium (iv/v) hydroxido and (iv/v/vi) oxido complexes supported by a seven-coordinate cyclen-anchored tris-aryloxide ligand. Chem Sci 2022; 13:11341-11351. [PMID: 36320575 PMCID: PMC9533418 DOI: 10.1039/d2sc02736d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/30/2022] [Indexed: 08/05/2023] Open
Abstract
We present the synthesis and reactivity of a newly developed, cyclen-based tris-aryloxide ligand precursor, namely cyclen(Me)( t-Bu,t-BuArOH)3, and its coordination chemistry to uranium. The corresponding uranium(iii) complex [UIII((OAr t-Bu,t-Bu)3(Me)cyclen)] (1) was characterized by 1H NMR analysis, CHN elemental analysis and UV/vis/NIR electronic absorption spectroscopy. Since no single-crystals suitable for X-ray diffraction analysis could be obtained from this precursor, 1 was oxidized with methylene chloride or silver fluoride to yield [(cyclen(Me)( t-Bu,t-BuArO)3)UIV(X)] (X = Cl (2), F (3)), which were unambiguously characterized and successfully crystallized to gain insight into the molecular structure by single-crystal X-ray diffraction analysis (SC-XRD). Further, the activation of H2O and N2O by 1 is presented, resulting in the U(iv) complex [(cyclen(Me)( t-Bu,t-BuArO)3)UIV(OH)] (4) and the U(v) complex [(cyclen(Me)( t-Bu,t-BuArO)3)UV(O)] (6). Complexes 2, 3, 4, and 6 were characterized by 1H NMR analysis, CHN elemental analysis, UV/vis/NIR electronic absorption spectroscopy, IR vibrational spectroscopy, and SQUID magnetization measurements as well as cyclic voltammetry. Furthermore, chemical oxidation of 3, 4, and 6 with AgF or AgSbF6 was achieved leading to complexes [(cyclen(Me)( t-Bu,t-BuArO)3)UV(F)2] (5), [(cyclen(Me)( t-Bu,t-BuArO)3)UV(OH)][SbF6] (7), and [(cyclen(Me)( t-Bu,t-BuArO)3)UVI(O)][SbF6] (8). Finally, reduction of 7 with KC8 yielded a U(iv) complex, spectroscopically and magnetochemically identified as K[(cyclen(Me)( t-Bu,t-BuArO)3)UIV(O)].
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Affiliation(s)
- Sascha T Löffler
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy Inorganic Chemistry Egerlandstraße 1 91058 Erlangen Germany
| | - Julian Hümmer
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy Inorganic Chemistry Egerlandstraße 1 91058 Erlangen Germany
| | - Andreas Scheurer
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy Inorganic Chemistry Egerlandstraße 1 91058 Erlangen Germany
| | - Frank W Heinemann
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy Inorganic Chemistry Egerlandstraße 1 91058 Erlangen Germany
| | - Karsten Meyer
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy Inorganic Chemistry Egerlandstraße 1 91058 Erlangen Germany
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3
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DiMucci IM, Root HD, Jones ZR, Kozimor SA, MacInnes MM, Miller JL, Mocko V, Oldham WJ, Stein BW. Photochemical separation of plutonium from uranium. Chem Commun (Camb) 2022; 58:10961-10964. [PMID: 36083292 DOI: 10.1039/d2cc04225h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Plutonium-based technologies would benefit if chemical hazards for purifying plutonium were reduced. One critical processing step where improvements could be impactful is the adjustment of plutonium oxidation-states during separations. This transformation often requires addition of redox agents. Unfortunately, many of the redox agents used previously cannot be used today because their properties are deemed incompatible with modern day processing facilities and waste stream safety requirements. We demonstrated herein that photochemistry can be used as an alternative to those chemical agents. We observed that (1) Pu4+ → Pu3+ and UO22+ → U4+ photoreduction proceeded in HCl(aq) and HNO3(aq) and (2) photogenerated Pu3+(aq) and U4+(aq) could be separated using anion exchange chromatography (high yield, >90%; good separation factor, 322).
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Affiliation(s)
- Ida M DiMucci
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Harrison D Root
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Zachary R Jones
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Stosh A Kozimor
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Molly M MacInnes
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Jeffrey L Miller
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Veronika Mocko
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Warren J Oldham
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Benjamin W Stein
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
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4
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Godsall M, Chilton NF. Investigation of the Electronic Structure and Optical Spectra of Uranium (IV), (V), and (VI) Complexes Using Multiconfigurational Methods. J Phys Chem A 2022; 126:6059-6066. [PMID: 36067502 PMCID: PMC9483975 DOI: 10.1021/acs.jpca.2c03314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Interpreting electronic
spectra of uranium-containing compounds
is an important component of fundamental chemistry as well as in the
assessment of waste streams in the nuclear fuel cycle. Here we employ
multiconfigurational calculations with CASSCF or DMRGSCF methods on
exemplar uranium molecules [UVIO2Cl4]2–, [UV(TRENTIPS)(N)]−, and [UIVCl5(THF)]−, featuring an array of geometries and oxidation states, to determine
their effectiveness in predicting electronic spectra, compared to
literature calculations and experimental data. For [UVIO2Cl4]2–, DMRGSCF alone shows
poor agreement with experiment, which can be improved by adding corrections
for dynamic correlation with MC-PDFT to give results of similar quality
to TD-DFT. However, for [UV(TRENTIPS)(N)]− the addition of dynamical correlation via MC-PDFT
or CASPT2 made no improvements over CASSCF, suggesting that perhaps
other factors such as solvation effects could be more important in
this case. Finally, for [UIVCl5(THF)]−, dynamical correlation included via MS-CASPT2 on top of CASSCF calculations
is crucial to obtaining a quantitatively correct spectrum. Here, MC-PDFT
fails to even qualitatively describe the spectrum, highlighting the
shortcomings of single-state methods in cases of near-degeneracy.
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Affiliation(s)
- Michael Godsall
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K
| | - Nicholas F Chilton
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K
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5
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Yoshida T, Shabana A, Zhang H, Izuogu DC, Sato T, Fuku K, Abe H, Horii Y, Cosquer G, Hoshino N, Akutagawa T, Thom AJW, Takaishi S, Yamashita M. Insight into the Gd–Pt Bond: Slow Magnetic Relaxation of a Heterometallic Gd–Pt Complex. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20210429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takefumi Yoshida
- Department of Chemistry, Graduate School of Science Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan
| | - Ahmed Shabana
- Department of Chemistry, Graduate School of Science Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Haitao Zhang
- Department of Chemistry, Graduate School of Science Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan
| | - David Chukwuma Izuogu
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road, Cambridge, CB2 1EW, UK
- Department of Pure and Industrial Chemistry University of Nigeria, Nsukka, 410001, Enugu State (Nigeria)
| | - Tetsu Sato
- Department of Chemistry, Graduate School of Science Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan
| | - Kentaro Fuku
- Department of Chemistry, Graduate School of Science Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan
| | - Hitoshi Abe
- Institute of Materials Structure Science High Energy Accelerator Research Organization (KEK) 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
- Department of Materials Structure Science, School of High Energy Accelerator Science, SOKENDAI(the Graduate University for Advanced Studies) 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
- 7Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
| | - Yoji Horii
- Department of Chemistry, Nara Womens` University, Kitauoyanishimachi, Nara 630-8503, Japan
| | - Goulven Cosquer
- Department of Chemistry, Graduate School of Science Hiroshima University, 1-3-1 Kagamiyama Higashihiroshima 739-8526, Japan
| | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan
| | - Alex J. W. Thom
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road, Cambridge, CB2 1EW, UK
| | - Shinya Takaishi
- Department of Chemistry, Graduate School of Science Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan
| | - Masahiro Yamashita
- Department of Chemistry, Graduate School of Science Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan
- School of Materials Science and Engineering Nankai University, Tianjin 300350, P.R. China
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6
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Functionalized Tris(anilido)triazacyclononanes as Hexadentate Ligands for the Encapsulation of U(III), U(IV) and La(III) Cations. INORGANICS 2021. [DOI: 10.3390/inorganics9120086] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Tripodal multidentate ligands have become increasingly popular in f-element chemistry for stabilizing unusual bonding motifs and supporting small molecule activation processes. The steric and electronic effects of ligand donor atom substituents have proved crucial in both of these applications. In this study we functionalized the previously reported tris-anilide ligand {tacn(SiMe2NPh)3} (tacn = 1,3,7-triazacyclononane) to incorporate substituted aromatic rings, with the aim of modifying f-element complex solubility and ligand steric effects. We report the synthesis of two proligands, {tacn(SiMe2NHAr)3} (Ar = C6H3Me2-3,5 or C6H4Me-4), and their respective group 1 transfer agents—{tacn(SiMe2NKAr)3}, M(III) complexes [M{tacn(SiMe2NAr)3}] for M = La and U, and U(IV) complexes [M{tacn(SiMe2NAr)3}(Cl)]. These compounds were characterized by multinuclear NMR and FTIR spectroscopy and elemental analysis. The paramagnetic uranium complexes were also characterized by solid state magnetic measurements and UV/Vis/NIR spectroscopy. U(III) complexes were additionally studied by EPR spectroscopy. The solid state structures of all f-block complexes were authenticated by single-crystal X-ray diffraction (XRD), together with a minor byproduct [U{tacn(SiMe2NC6H4Me-4)3}(I)]. Comparisons of the characterization data of our f-element complexes with similar literature examples containing the {tacn(SiMe2NPh)3} ligand set showed minor changes in physicochemical properties resulting from the different aromatic ring substitution patterns we investigated.
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7
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Perala R, Singh BP, Putta VN, Acharya R, Ningthoujam RS. Enrichment of Crystal Field Modification via Incorporation of Alkali K + Ions in YVO 4:Ho 3+/Yb 3+ Nanophosphor and Its Hybrid with Superparamagnetic Iron Oxide Nanoparticles for Optical, Advanced Anticounterfeiting, Uranyl Detection, and Hyperthermia Applications. ACS OMEGA 2021; 6:19517-19528. [PMID: 34368538 PMCID: PMC8340087 DOI: 10.1021/acsomega.1c01813] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 05/25/2021] [Indexed: 05/13/2023]
Abstract
In this work, we report a polyol route for easy synthesis of upconversion (UC) phosphor nanoparticles, YVO4:Ho3+-Yb3+-K+, which enables large-scale production and enhancement of luminescence. Upon 980 nm laser excitation, the UC emission spectrum shows a sharp bright peak at ∼650 nm of Ho3+ ion; and the luminescence intensity increases twofold upon K+ codoping. Upon 300 nm excitation, the downconversion emission spectrum shows a broad peak in the 400-500 nm range (related to the charge transfer band of V-O) along with Ho3+ peaks. In addition, the polyethylene glycol-coated UC nanoparticles are highly water-dispersible and their hybrid with Fe3O4 nanoparticles shows magnetic-luminescence properties. A hyperthermia temperature is achieved from this hybrid. Both UC and hybrid nanoparticles show interesting security ink properties upon excitation by a 980 nm laser. The particles are invisible in normal light but visible upon 980 nm excitation and are useful in display devices, advanced anticounterfeiting purposes, and therapy of cancer via hyperthermia and bioimaging (since it shows red emission at ∼650 nm). Using UC nanoparticles, detection of uranyl down to 20 ppm has been achieved.
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Affiliation(s)
- Ramaswamy
Sandeep Perala
- Department
of Chemistry, GITAM University, Hyderabad 502329, India
- Chemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Bheeshma Pratap Singh
- Chemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- . Tel.: +91-22-25592321
| | | | - Raghunath Acharya
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi
Bhabha National Institute, Mumbai 400094, India
- . Tel.: +91-22-25594590
| | - Raghumani Singh Ningthoujam
- Chemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi
Bhabha National Institute, Mumbai 400094, India
- . Tel.: +91-22-25592321
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8
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Faizova R, Fadaei‐Tirani F, Chauvin A, Mazzanti M. Synthesis and Characterization of Water Stable Uranyl(V) Complexes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Radmila Faizova
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Farzaneh Fadaei‐Tirani
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Anne‐Sophie Chauvin
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
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9
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Faizova R, Fadaei‐Tirani F, Chauvin A, Mazzanti M. Synthesis and Characterization of Water Stable Uranyl(V) Complexes. Angew Chem Int Ed Engl 2021; 60:8227-8235. [DOI: 10.1002/anie.202016123] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/04/2021] [Indexed: 12/13/2022]
Affiliation(s)
- Radmila Faizova
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Farzaneh Fadaei‐Tirani
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Anne‐Sophie Chauvin
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
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10
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Zhang Y, Karatchevtseva I, Liu M, Tao Z, Wei G. Thorium(IV) and uranium(IV) complexes with cucurbit[8]uril: Supramolecular structures via direct coordination and second-shell interactions. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Kushwaha S, Mane M, Ravindranathan S, Das A. Polymer Nanorings with Uranium Specific Clefts for Selective Recovery of Uranium from Acidic Effluents via Reductive Adsorption. ACS Sens 2020; 5:3254-3263. [PMID: 32975114 DOI: 10.1021/acssensors.0c01684] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nanostructured polymeric materials, functionalized with an appropriate receptor, have opened up newer possibilities for designing a reagent that shows analyte-specific recognition and efficient scavenging of an analyte that has either a detrimental influence on human physiology and environment or on its recovery for further value addition. Higher active surface area, morphological diversity, synthetic tunability for desired surface functionalization, and the ease of regeneration of a nanostructured material for further use have provided such materials with a distinct edge over conventional reagents. The use of a biodegradable polymeric backbone has an added significance owing to the recent concern over the impact of polymers on the environment. Functionalization of biodegradable sodium alginate with AENA (6.85% grafting) as the receptor functionality led to a unique open framework nanoring (NNRG) morphology with a favorable spatial orientation for specific recognition and efficient binding to uranyl ions (U) in an aqueous medium over a varied pH range. Nanoring morphology was confirmed by transmission electron microscopy and atomic force microscopy images. The nanoscale design maximizes the surface area for the molecular scavenger. A combination of all these features along with the reversible binding phenomenon has made NNRG a superior reagent for specific, efficient uptake of UO22+ species from an acidic (pH 3-4) solution and compares better than all existing UO22+-scavengers reported till date. This could be utilized for the recovery of uranyl species from a synthetic acidic effluent of the nuclear power. The results of the U uptake experiments reveal a maximum adsorption capacity of 268 mg of U per g of NNRG in a synthetic nuclear effluent. X-ray photoelectron spectroscopy studies revealed a reductive complexation process and stabilization of U(IV)-species in adsorbed uranium species (U@NNRG).
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Affiliation(s)
- Shilpi Kushwaha
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
- Analytical and Environmental Sciences Division and Centralized Instrumentation Facility, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Manoj Mane
- KAUST Catalysis Centre, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-900, Saudi Arabia
| | - Sapna Ravindranathan
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
- Central NMR Facility, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Amitava Das
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
- Department of Chemical Sciences, Indian Institute of Science and Education and Research Kolkata, Mohanpur 741246, West Bengal, India
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12
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Cha W, Kim HK, Cho H, Cho HR, Jung EC, Lee SY. Studies of aqueous U(iv) equilibrium and nanoparticle formation kinetics using spectrophotometric reaction modeling analysis. RSC Adv 2020; 10:36723-36733. [PMID: 35517939 PMCID: PMC9057037 DOI: 10.1039/d0ra05352j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 09/21/2020] [Indexed: 01/31/2023] Open
Abstract
Hydrolysis of tetravalent uranium (U(iv)) and U(iv)-nanoparticle formation kinetics were examined over a wide range of temperatures using spectrophotometric reaction modeling analysis. The characteristic absorption bands representing U4+, U(OH)3+, and a proposed oxohydroxo species were newly identified in the UV region (190–300 nm). Dynamic absorption band changes in the UV and visible regions (360–800 nm) were explored to reevaluate the binary ion interaction coefficients for U(iv) ions and the thermodynamic constants of the primary hydrolysis reaction, including complexation constants, enthalpy, and entropy. No further hydrolysis equilibrium beyond the formation of U(OH)3+ was identified. Instead, an irreversible transformation of U(iv) ions to U(iv)-nanoparticles (NPs) was found to occur exclusively via the formation of a new intermediate species possessing characteristic absorption bands. The kinetic analysis, based on a two-step, pseudo-first-order reaction model, revealed that the rate of the initial step producing the intermediates is highly temperature-dependent with the measured kinetic energy barrier of ∼188 kJ mol−1. With additional experimental evidence, we conclude that the intermediates are oligomeric oxohydroxo U(iv) species occurring from the condensation of U(iv) ions and simultaneously participating in the nucleation and growth process of UO2(cr)-NPs. The primary hydrolysis equilibrium of U4+ and the kinetics of U(iv)-nanoparticle formation were investigated by using spectrophotometric reaction modeling analysis and the spectral data collected in the UV and visible regions.![]()
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Affiliation(s)
- Wansik Cha
- Nuclear Chemistry Research Laboratory, Korea Atomic Energy Research Institute 989-111 Daedeok-daero, Yuseong-gu Daejeon 34057 Republic of Korea
| | - Hee-Kyung Kim
- Nuclear Chemistry Research Laboratory, Korea Atomic Energy Research Institute 989-111 Daedeok-daero, Yuseong-gu Daejeon 34057 Republic of Korea
| | - Hyejin Cho
- Nuclear Chemistry Research Laboratory, Korea Atomic Energy Research Institute 989-111 Daedeok-daero, Yuseong-gu Daejeon 34057 Republic of Korea
| | - Hye-Ryun Cho
- Nuclear Chemistry Research Laboratory, Korea Atomic Energy Research Institute 989-111 Daedeok-daero, Yuseong-gu Daejeon 34057 Republic of Korea
| | - Euo Chang Jung
- Nuclear Chemistry Research Laboratory, Korea Atomic Energy Research Institute 989-111 Daedeok-daero, Yuseong-gu Daejeon 34057 Republic of Korea
| | - Seung Yeop Lee
- Radioactive Waste Management Research Division, Korea Atomic Energy Research Institute 989-111 Daedeok-daero, Yuseong-gu Daejeon 34057 Republic of Korea
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13
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Rice NT, McCabe K, Bacsa J, Maron L, La Pierre HS. Two-Electron Oxidative Atom Transfer at a Homoleptic, Tetravalent Uranium Complex. J Am Chem Soc 2020; 142:7368-7373. [PMID: 32248676 DOI: 10.1021/jacs.0c02693] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A tetrahomoleptic, pseudotetrahedral U4+ imidophosphorane complex, [U(NP(pip)3)4], 1-U(PN), is reported. This complex can be oxidized by two electrons with either mesityl azide or nitrous oxide. This two-electron atom/group transfer oxidation is the first example observed at a homoleptic, tetravalent uranium complex. The mesityl imido compound [U(NMes)(NP(pip)3)4], 2-U(PN)NMes, exhibits a unique square pyramidal geometry in contrast to the expected trigonal bipyramidal geometry of the oxo complex [U(O)(NP(pip)3)4], 2-U(PN)O. The bonding driving the structural dichotomy of these structures and the absence of a structurally observable inverse trans-influence in 2-U(PN)NMes were examined by DFT and natural bonding orbital analysis.
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Affiliation(s)
- Natalie T Rice
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Karl McCabe
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquees, 31077 Toulouse, Cedex 4 France
| | - John Bacsa
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquees, 31077 Toulouse, Cedex 4 France
| | - Henry S La Pierre
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States.,Nuclear and Radiological Engineering and Medical Physics Program, School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
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14
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Wacker JN, Han SY, Murray AV, Vanagas NA, Bertke JA, Sperling JM, Surbella RG, Knope KE. From Thorium to Plutonium: Trends in Actinide(IV) Chloride Structural Chemistry. Inorg Chem 2019; 58:10578-10591. [DOI: 10.1021/acs.inorgchem.9b01279] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jennifer N. Wacker
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Sae Young Han
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Aphra V. Murray
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Nicole A. Vanagas
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Jeffery A. Bertke
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Joseph M. Sperling
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Robert G. Surbella
- Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States
| | - Karah E. Knope
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
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15
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Pandit P, Kumar S, Mohapatra M, Bangotra P, Mehra R, Singh AK. Structural, photoluminescence and dielectric investigations of phosphatic shale. LUMINESCENCE 2019; 34:212-221. [PMID: 30697953 DOI: 10.1002/bio.3598] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 11/21/2018] [Accepted: 12/24/2018] [Indexed: 11/10/2022]
Abstract
In the current study, the structural and spectroscopic properties of phosphatic shale samples obtained from the Atomic Minerals Directorate for Exploration and Research were probed for potential use as a phosphor material. X-ray diffraction and Raman and Fourier transform infrared spectroscopy revealed that the beneficiated phosphatic shale samples were primarily monophasic consisting of fluorapatite [Ca5 (PO4 )3 F, (FAP)] with minor traces of haematite (α-Fe2 O3 ) and calcite (CaCO3 ). Energy dispersive X-ray fluorescence revealed the presence of U, Eu, Dy and Tb in the FAP matrix substituted at Ca(I) and Ca(II) sites of FAP. A reduced optical direct band gap of 4.46 eV was calculated from the Tauc plot. Photoluminescence spectral studies revealed multicolour emissions (red, yellow, green and blue) on ultraviolet light excitation that were attributed to luminescence spectra from rare earth ions Eu3+ , Tb3+ , U4+ and U6+ in the FAP matrix. The overall emissions for the rare earth and actinide-doped FAP were obtained in the cool white region and the corresponding Commission Internationale de l'Eclairage chromaticity coordinates were calculated to be (0.274, 0.317). The corresponding colour correlated temperature obtained was 9342 K. Furthermore, phosphatic shale had a high room temperature dielectric constant of 11 at a frequency of 1 kHz that demonstrated its suitability for use in biological sensors. The study showed that natural phosphatic shale could be a potential material for optical, biological and dielectric applications.
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Affiliation(s)
- Pragya Pandit
- Atomic Minerals Department for Exploration and Research, New Delhi, India.,USICT, GGSIPU, New Delhi, India
| | - Shailendra Kumar
- Atomic Minerals Department for Exploration and Research, New Delhi, India
| | - Manoj Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Center, Mumbai, India
| | - Pargin Bangotra
- B.R. Ambedkar National Institute of Technology, Jalandhar, India
| | - Rohit Mehra
- B.R. Ambedkar National Institute of Technology, Jalandhar, India
| | - A K Singh
- Maharaja Surajmal Institute of Technology, USICT, GGSIPU, New Delhi, India
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16
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Nuzzo S, van Leusen J, Twamley B, Platts JA, Kögerler P, Baker RJ. Oxidation of uranium(iv) thiocyanate complexes: cation–cation interactions in mixed-valent uranium coordination chains. Dalton Trans 2019; 48:6704-6708. [DOI: 10.1039/c9dt01005j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Oxidation of Cs4[U(NCS)8] in different solvents results in two mixed-valent uranium compounds. Spectroscopic, magnetic and computational data support a unique [UIVUVUIV][UVI] oxidation state assignment in [U(DMF)8(μ-O)U(NCS)5(μ-O)U(DMF)7(NCS)][UO2(NCS)5].
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Affiliation(s)
- Stefano Nuzzo
- School of Chemistry
- University of Dublin
- Trinity College
- Dublin 2
- Ireland
| | - Jan van Leusen
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52074 Aachen
- Germany
| | - Brendan Twamley
- School of Chemistry
- University of Dublin
- Trinity College
- Dublin 2
- Ireland
| | | | - Paul Kögerler
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52074 Aachen
- Germany
| | - Robert J. Baker
- School of Chemistry
- University of Dublin
- Trinity College
- Dublin 2
- Ireland
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17
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Behrle AC, Myers AJ, Kerridge A, Walensky JR. Coordination Chemistry and QTAIM Analysis of Homoleptic Dithiocarbamate Complexes, M(S2CNiPr2)4 (M = Ti, Zr, Hf, Th, U, Np). Inorg Chem 2018; 57:10518-10524. [DOI: 10.1021/acs.inorgchem.8b00077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew C. Behrle
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7600, United States
| | - Alexander J. Myers
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7600, United States
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, U.K
| | - Justin R. Walensky
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7600, United States
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18
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Zhang Y, Bhadbhade M, Avdeev M, Price JR, Karatchevtseva I, Li Q, Tao Z, Wei G. Thorium(IV) and Uranium(IV) Complexes with Cucurbit[5]uril. Inorg Chem 2018; 57:8588-8598. [PMID: 29949372 DOI: 10.1021/acs.inorgchem.8b01347] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tetravalent thorium and uranium complexes with cucurbit[5]uril (Q[5]) were investigated with eight new complexes being synthesized and structurally characterized. [Th(Q[5])(OH)(H2O)2]6·18NO3· nH2O (1) has a hexagonal nanowheel structure with each of the six Th4+ ions being cap-coordinated by a Q[5] and monodentate-coordinated to the nearby Q[5]. [Th(Q[5])(HCOO)(H2O)4][Th(NO3)5(H2O)2]2[Th(NO3)3(HCOO)(H2O)2]0.5·NO3· nH2O (2) has a heteroleptic mononuclear structure with a Th4+ ion cap-coordinated on one side of the Q[5] portal and monodentate-coordinated to a formate anion inside the Q[5] cavity. [KTh1.5(Q[5])Cl(NO3)3][Th(NO3)5(H2O)2]·2NO3·2.5H2O (3) has a heterometallic structure with both Th4+ and K+ ions each occupying one side of the two Q[5] portals forming a capsule. [CsTh(Q[5])Cl(NO3)2(H2O)3]·2NO3· nH2O (4) has a heterometallic 1D polymeric structure with both Th4+ and Cs+ ions each occupying one side of the two Q[5] portals, forming monomers which are linked together by sharing two water molecules and one carbonyl oxygen atom between Th4+ and Cs+ ions. [Th(Q[5])Cl(H2O)][CdCl3][CdCl4]·0.5HCl·4H2O (5), [Th(Q[5])Cl(H2O)][Ru2OCl9(H2O)]·0.5HCl·9.5H2O (6), [Th(Q[5])Cl(H2O)][IrCl6]1.5·3H2O (7), and [U(Q[5])Cl(H2O)][ZnCl3(H2O)][(ZnCl4)]·8H2O (8) have similar 1D polymeric structures with Th4+/U4+ ions cap-coordinated on one side of a Q[5] and bidentate coordinated to the nearby Q[5]. The transition metal chlorides act as anions for charge compensation as well as structure inducers via cation-anion interactions forming various anion patterns around the 1D polymers. Actinide contraction has been observed in the early actinide series.
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Affiliation(s)
- Yingjie Zhang
- Australian Nuclear Science and Technology Organization , Locked Bag 2001 , Kirrawee DC , NSW 2232 , Australia
| | - Mohan Bhadbhade
- Mark Wainwright Analytical Centre , University of New South Wales , Kensington , NSW 2052 , Australia
| | - Maxim Avdeev
- Australian Nuclear Science and Technology Organization , Locked Bag 2001 , Kirrawee DC , NSW 2232 , Australia
| | - Jason R Price
- Australian Synchrotron , 800 Blackburn Road , Clayton , VIC 3168 , Australia
| | - Inna Karatchevtseva
- Australian Nuclear Science and Technology Organization , Locked Bag 2001 , Kirrawee DC , NSW 2232 , Australia
| | - Qing Li
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province , Guizhou University , Guiyang , Guizhou 550025 , P. R. China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province , Guizhou University , Guiyang , Guizhou 550025 , P. R. China
| | - Gang Wei
- CSIRO Manufacturing , PO Box 218, Lindfield , NSW 2070 , Australia
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19
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Vanagas NA, Wacker JN, Rom CL, Glass EN, Colliard I, Qiao Y, Bertke JA, Van Keuren E, Schelter EJ, Nyman M, Knope KE. Solution and Solid State Structural Chemistry of Th(IV) and U(IV) 4-Hydroxybenzoates. Inorg Chem 2018; 57:7259-7269. [DOI: 10.1021/acs.inorgchem.8b00919] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicole A. Vanagas
- Department of Chemistry, Georgetown University, 37th and O Streets Northwest, Washington, D.C. 20057, United States
| | - Jennifer N. Wacker
- Department of Chemistry, Georgetown University, 37th and O Streets Northwest, Washington, D.C. 20057, United States
| | - Christopher L. Rom
- Department of Chemistry, Georgetown University, 37th and O Streets Northwest, Washington, D.C. 20057, United States
| | - Elliot N. Glass
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Ian Colliard
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Jeffery A. Bertke
- Department of Chemistry, Georgetown University, 37th and O Streets Northwest, Washington, D.C. 20057, United States
| | - Edward Van Keuren
- Department of Physics, Georgetown University, 37th and O Streets Northwest, Washington, D.C. 20057, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Karah E. Knope
- Department of Chemistry, Georgetown University, 37th and O Streets Northwest, Washington, D.C. 20057, United States
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20
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Baselga-Cervera B, Romero-López J, García-Balboa C, Costas E, López-Rodas V. Improvement of the Uranium Sequestration Ability of a Chlamydomonas sp. (ChlSP Strain) Isolated From Extreme Uranium Mine Tailings Through Selection for Potential Bioremediation Application. Front Microbiol 2018; 9:523. [PMID: 29662476 PMCID: PMC5890155 DOI: 10.3389/fmicb.2018.00523] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 03/08/2018] [Indexed: 12/22/2022] Open
Abstract
The extraction and processing of uranium (U) have polluted large areas worldwide, rendering anthropogenic extreme environments inhospitable to most species. Noticeably, these sites are of great interest for taxonomical and applied bioprospection of extremotolerant species successfully adapted to U tailings contamination. As an example, in this work we have studied a microalgae species that inhabits extreme U tailings ponds at the Saelices mining site (Salamanca, Spain), characterized as acidic (pH between 3 and 4), radioactive (around 4 μSv h−1) and contaminated with metals, mainly U (from 25 to 48 mg L−1) and zinc (from 17 to 87 mg L−1). After isolation of the extremotolerant ChlSP strain, morphological characterization and internal transcribed spacer (ITS)-5.8S gene sequences placed it in the Chlamydomonadaceae, but BLAST analyses identity values, against the nucleotide datasets at the NCBI database, were very low (<92%). We subjected the ChlSP strain to an artificial selection protocol to increase the U uptake and investigated its response to selection. The ancestral strain ChlSP showed a U-uptake capacity of ≈4.30 mg U g−1 of dry biomass (DB). However, the artificially selected strain ChlSG was able to take up a total of ≈6.34 mg U g−1 DB, close to the theoretical maximum response (≈7.9 mg U g−1 DB). The selected ChlSG strain showed two possible U-uptake mechanisms: the greatest proportion by biosorption onto cell walls (ca. 90%), and only a very small quantity, ~0.46 mg g−1 DB, irreversibly bound by bioaccumulation. Additionally, the kinetics of the U-uptake process were characterized during a microalgae growth curve; ChlSG cells removed close to 4 mg L−1 of U in 24 days. These findings open up promising prospects for sustainable management of U tailings waters based on newly evolved extremotolerants and outline the potential of artificial selection in the improvement of desired features in microalgae by experimental adaptation and selection.
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Affiliation(s)
- Beatriz Baselga-Cervera
- Department of Animal Production (Genetics), School of Veterinary Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Julia Romero-López
- Department of Animal Production (Genetics), School of Veterinary Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Camino García-Balboa
- Department of Animal Production (Genetics), School of Veterinary Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Eduardo Costas
- Department of Animal Production (Genetics), School of Veterinary Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Victoria López-Rodas
- Department of Animal Production (Genetics), School of Veterinary Medicine, Universidad Complutense de Madrid, Madrid, Spain
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21
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Wacker JN, Vasiliu M, Huang K, Baumbach RE, Bertke JA, Dixon DA, Knope KE. Uranium(IV) Chloride Complexes: UCl62– and an Unprecedented U(H2O)4Cl4 Structural Unit. Inorg Chem 2017; 56:9772-9780. [DOI: 10.1021/acs.inorgchem.7b01293] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jennifer N. Wacker
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Kevin Huang
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Ryan E. Baumbach
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
- Department of Physics, Florida State University, Tallahassee, Florida 32310, United States
| | - Jeffery A. Bertke
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Karah E. Knope
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
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22
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Martin NP, März J, Volkringer C, Henry N, Hennig C, Ikeda-Ohno A, Loiseau T. Synthesis of Coordination Polymers of Tetravalent Actinides (Uranium and Neptunium) with a Phthalate or Mellitate Ligand in an Aqueous Medium. Inorg Chem 2017; 56:2902-2913. [DOI: 10.1021/acs.inorgchem.6b02962] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicolas P. Martin
- Unité de Catalyse et Chimie du Solide (UCCS), UMR, CNRS 8181, Université de Lille, École Nationale Supérieure de Chimie de Lille, Centrale Lille, Université Artois, 59000 Lille, France
| | - Juliane März
- Institute of Resource Ecology, HDZR - Helmholtz-Zentrum Dresden-Rossendorf, Bautzner
Landstrasse 400, 01328 Dresden, Germany
| | - Christophe Volkringer
- Unité de Catalyse et Chimie du Solide (UCCS), UMR, CNRS 8181, Université de Lille, École Nationale Supérieure de Chimie de Lille, Centrale Lille, Université Artois, 59000 Lille, France
- Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France
| | - Natacha Henry
- Unité de Catalyse et Chimie du Solide (UCCS), UMR, CNRS 8181, Université de Lille, École Nationale Supérieure de Chimie de Lille, Centrale Lille, Université Artois, 59000 Lille, France
| | - Christoph Hennig
- Institute of Resource Ecology, HDZR - Helmholtz-Zentrum Dresden-Rossendorf, Bautzner
Landstrasse 400, 01328 Dresden, Germany
| | - Atsushi Ikeda-Ohno
- Institute of Resource Ecology, HDZR - Helmholtz-Zentrum Dresden-Rossendorf, Bautzner
Landstrasse 400, 01328 Dresden, Germany
| | - Thierry Loiseau
- Unité de Catalyse et Chimie du Solide (UCCS), UMR, CNRS 8181, Université de Lille, École Nationale Supérieure de Chimie de Lille, Centrale Lille, Université Artois, 59000 Lille, France
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23
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Gupta SK, Reghukumar C, Pathak N, Sudarshan K, Tyagi D, Mohapatra M, Pujari P, Kadam R. Speciation of uranium and doping induced defects in Gd1.98U0.02Zr2O7: Photoluminescence, X-ray photoelectron and positron annihilation lifetime spectroscopy. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.11.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Liu Y, Becker B, Burdine B, Sigmon GE, Burns PC. Photocatalytic decomposition of Rhodamine B on uranium-doped mesoporous titanium dioxide. RSC Adv 2017. [DOI: 10.1039/c7ra01385j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Mesoporous uranium-doped TiO2 anatase materials were studied to determine the influence of U-doping on the photocatalytic properties for Rhodamine B (RhB) degradation.
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Affiliation(s)
- Yi Liu
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Notre Dame
- USA
| | - Blake Becker
- Department of Civil & Environmental Engineering & Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
| | - Brandon Burdine
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- Notre Dame
- USA
| | - Ginger E. Sigmon
- Department of Civil & Environmental Engineering & Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
| | - Peter C. Burns
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Notre Dame
- USA
- Department of Civil & Environmental Engineering & Earth Sciences
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25
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Pankhurst JR, Bell NL, Zegke M, Platts LN, Lamfsus CA, Maron L, Natrajan LS, Sproules S, Arnold PL, Love JB. Inner-sphere vs. outer-sphere reduction of uranyl supported by a redox-active, donor-expanded dipyrrin. Chem Sci 2016; 8:108-116. [PMID: 28451154 PMCID: PMC5304617 DOI: 10.1039/c6sc02912d] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 10/11/2016] [Indexed: 11/21/2022] Open
Abstract
The uranyl(vi) complex UO2Cl(L) of the redox-active, acyclic diimino-dipyrrin anion, L- is reported and its reaction with inner- and outer-sphere reductants studied. Voltammetric, EPR-spectroscopic and X-ray crystallographic studies show that chemical reduction by the outer-sphere reagent CoCp2 initially reduces the ligand to a dipyrrin radical, and imply that a second equivalent of CoCp2 reduces the U(vi) centre to form U(v). Cyclic voltammetry indicates that further outer-sphere reduction to form the putative U(iv) trianion only occurs at strongly cathodic potentials. The initial reduction of the dipyrrin ligand is supported by emission spectra, X-ray crystallography, and DFT; the latter also shows that these outer-sphere reactions are exergonic and proceed through sequential, one-electron steps. Reduction by the inner-sphere reductant [TiCp2Cl]2 is also likely to result in ligand reduction in the first instance but, in contrast to the outer-sphere case, reduction of the uranium centre becomes much more favoured, allowing the formation of a crystallographically characterised, doubly-titanated U(iv) complex. In the case of inner-sphere reduction only, ligand-to-metal electron-transfer is thermodynamically driven by coordination of Lewis-acidic Ti(iv) to the uranyl oxo, and is energetically preferable over the disproportionation of U(v). Overall, the involvement of the redox-active dipyrrin ligand in the reduction chemistry of UO2Cl(L) is inherent to both inner- and outer-sphere reduction mechanisms, providing a new route to accessing a variety of U(vi), U(v), and U(iv) complexes.
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Affiliation(s)
- James R Pankhurst
- EaStCHEM School of Chemistry , The University of Edinburgh , Joseph Black Building, David Brewster Road , Edinburgh , EH9 3FJ , UK . ;
| | - Nicola L Bell
- EaStCHEM School of Chemistry , The University of Edinburgh , Joseph Black Building, David Brewster Road , Edinburgh , EH9 3FJ , UK . ;
| | - Markus Zegke
- EaStCHEM School of Chemistry , The University of Edinburgh , Joseph Black Building, David Brewster Road , Edinburgh , EH9 3FJ , UK . ;
| | - Lucy N Platts
- EaStCHEM School of Chemistry , The University of Edinburgh , Joseph Black Building, David Brewster Road , Edinburgh , EH9 3FJ , UK . ;
| | - Carlos Alvarez Lamfsus
- LPCNO , INSA , Université de Toulouse , 135, avenue de Rangueil , 31077 Toulouse cedex 4 , France
| | - Laurent Maron
- LPCNO , INSA , Université de Toulouse , 135, avenue de Rangueil , 31077 Toulouse cedex 4 , France
| | - Louise S Natrajan
- Centre for Radiochemisty Research , School of Chemistry , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK
| | - Stephen Sproules
- WestCHEM School of Chemistry , University of Glasgow , Glasgow , G12 8QQ , UK
| | - Polly L Arnold
- EaStCHEM School of Chemistry , The University of Edinburgh , Joseph Black Building, David Brewster Road , Edinburgh , EH9 3FJ , UK . ;
| | - Jason B Love
- EaStCHEM School of Chemistry , The University of Edinburgh , Joseph Black Building, David Brewster Road , Edinburgh , EH9 3FJ , UK . ;
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26
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Speciation of U and Am in sol–gel derived borosilicate glasses by photoluminescence lifetime spectroscopy. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-015-4499-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Ren Y, Tang H, Shao L, Zhong J, Chu M, Yang R, Kong C. Theoretical study on complexation of U(vi) with ODA, IDA and TDA based on density functional theory. RSC Adv 2016. [DOI: 10.1039/c6ra05382c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Precise structures of U(vi) complexes with ODA, IDA and TDA in different binding modes.
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Affiliation(s)
- Yiming Ren
- Institute of Materials
- China Academy of Engineering Physics
- Mianyang
- China
| | - Hao Tang
- Institute of Materials
- China Academy of Engineering Physics
- Mianyang
- China
| | - Lang Shao
- Institute of Materials
- China Academy of Engineering Physics
- Mianyang
- China
| | - Jingrong Zhong
- Institute of Materials
- China Academy of Engineering Physics
- Mianyang
- China
| | - Mingfu Chu
- Institute of Materials
- China Academy of Engineering Physics
- Mianyang
- China
| | - Ruizhu Yang
- Institute of Materials
- China Academy of Engineering Physics
- Mianyang
- China
| | - Chuipeng Kong
- State Key Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- China
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28
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Behrle AC, Kerridge A, Walensky JR. Dithio- and Diselenophosphinate Thorium(IV) and Uranium(IV) Complexes: Molecular and Electronic Structures, Spectroscopy, and Transmetalation Reactivity. Inorg Chem 2015; 54:11625-36. [PMID: 26636609 DOI: 10.1021/acs.inorgchem.5b01342] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a comparison of the molecular and electronic structures of dithio- and diselenophosphinate, (E2PR2)(1-) (E = S, Se; R = (i)Pr, (t)Bu), with thorium(IV) and uranium(IV) complexes. For the thorium dithiophosphinate complexes, reaction of ThCl4(DME)2 with 4 equiv of KS2PR2 (R = (i)Pr, (t)Bu) produced the homoleptic complexes, Th(S2P(i)Pr2)4 (1S-Th-(i)Pr) and Th(S2P(t)Bu2)4 (2S-Th-(t)Bu). The diselenophosphinate complexes were synthesized in a similar manner using KSe2PR2 to produce Th(Se2P(i)Pr2)4 (1Se-Th-(i)Pr) and Th(Se2P(t)Bu2)4 (2Se-Th-(t)Bu). U(S2P(i)Pr2)4, 1S-U-(i)Pr, could be made directly from UCl4 and 4 equiv of KS2P(i)Pr2. With (Se2P(i)Pr2)(1-), using UCl4 and 3 or 4 equiv of KSe2P(i)Pr2 yielded the monochloride product U(Se2P(i)Pr2)3Cl (3Se-U(iPr)-Cl), but using UI4(1,4-dioxane)2 produced the homoleptic U(Se2P(i)Pr2)4 (1Se-U-(i)Pr). Similarly, the reaction of UCl4 with 4 equiv of KS2P(t)Bu2 yielded U(S2P(t)Bu2)4 (2S-U-(t)Bu), whereas the reaction with KSe2P(t)Bu2 resulted in the formation of U(Se2P(t)Bu2)3Cl (4Se-U(tBu)-Cl). Using UI4(1,4-dioxane)2 and 4 equiv of KSe2P(t)Bu2 with UCl4 in acetonitrile yielded U(Se2P(t)Bu2)4 (2Se-U-(t)Bu). Transmetalation reactions were investigated with complex 2Se-U-(t)Bu and various CuX (X = Br, I) salts to yield U(Se2P(t)Bu2)3X (6Se-U(tBu)-Br and 7Se-U(tBu)-I) and 0.25 equiv of [Cu(Se2P(t)Bu2)]4 (8Se-Cu-(t)Bu). Additionally, 2Se-U-(t)Bu underwent transmetalation reactions with Hg2F2 and ZnCl2 to yield U(Se2P(t)Bu2)3F (6) and U(Se2P(t)Bu2)3Cl (4Se-U(tBu)-Cl), respectively. The molecular structures were analyzed using (1)H, (13)C, (31)P, and (77)Se NMR and IR spectroscopy and structurally characterized using X-ray crystallography. Using the QTAIM approach, the electronic structure of all homoleptic complexes was probed, showing slightly more covalent bonding character in actinide-selenium bonds over actinide-sulfur bonds.
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Affiliation(s)
- Andrew C Behrle
- Department of Chemistry, University of Missouri , Columbia, Missouri 65211-7600, United States
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University , Lancaster LA1 4YB, United Kingdom
| | - Justin R Walensky
- Department of Chemistry, University of Missouri , Columbia, Missouri 65211-7600, United States
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Assessing Covalency in Cerium and Uranium Hexachlorides: A Correlated Wavefunction and Density Functional Theory Study. INORGANICS 2015. [DOI: 10.3390/inorganics3040482] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Batrice RJ, McKinven J, Arnold PL, Eisen MS. Selective Oligomerization and [2 + 2 + 2] Cycloaddition of Terminal Alkynes from Simple Actinide Precatalysts. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00455] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rami J. Batrice
- Schulich
Faculty of Chemistry, Institute of Catalysis Science and Technology, Technion − Israel Institute of Technology, Technion City, 32000, Haifa, Israel
| | - Jamie McKinven
- EaStCHEM
School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s Building, Edinburgh EH9 3FJ, United Kingdom
| | - Polly L. Arnold
- EaStCHEM
School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s Building, Edinburgh EH9 3FJ, United Kingdom
| | - Moris S. Eisen
- Schulich
Faculty of Chemistry, Institute of Catalysis Science and Technology, Technion − Israel Institute of Technology, Technion City, 32000, Haifa, Israel
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Martin B, Autschbach J. Temperature dependence of contact and dipolar NMR chemical shifts in paramagnetic molecules. J Chem Phys 2015; 142:054108. [PMID: 25662637 DOI: 10.1063/1.4906318] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Using a recently proposed equation for NMR nuclear magnetic shielding for molecules with unpaired electrons [A. Soncini and W. Van den Heuvel, J. Chem. Phys. 138, 021103 (2013)], equations for the temperature (T) dependent isotropic shielding for multiplets with an effective spin S equal to 1/2, 1, 3/2, 2, and 5/2 in terms of electron paramagnetic resonance spin Hamiltonian parameters are derived and then expanded in powers of 1/T. One simplifying assumption used is that a matrix derived from the zero-field splitting (ZFS) tensor and the Zeeman coupling matrix (g-tensor) share the same principal axis system. The influence of the rhombic ZFS parameter E is only investigated for S = 1. Expressions for paramagnetic contact shielding (from the isotropic part of the hyperfine coupling matrix) and pseudo-contact or dipolar shielding (from the anisotropic part of the hyperfine coupling matrix) are considered separately. The leading order is always 1/T. A temperature dependence of the contact shielding as 1/T and of the dipolar shielding as 1/T(2), which is sometimes assumed in the assignment of paramagnetic chemical shifts, is shown to arise only if S ≥ 1 and zero-field splitting is appreciable, and only if the Zeeman coupling matrix is nearly isotropic (Δg = 0). In such situations, an assignment of contact versus dipolar shifts may be possible based only on linear and quadratic fits of measured variable-temperature chemical shifts versus 1/T. Numerical data are provided for nickelocene (S = 1). Even under the assumption of Δg = 0, a different leading order of contact and dipolar shifts in powers of 1/T is not obtained for S = 3/2. When Δg is not very small, dipolar and contact shifts both depend in leading order in 1/T in all cases, with sizable contributions in order 1/T(n) with n = 2 and higher.
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Affiliation(s)
- Bob Martin
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, USA
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, USA
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Falaise C, Assen A, Mihalcea I, Volkringer C, Mesbah A, Dacheux N, Loiseau T. Coordination polymers of uranium(IV) terephthalates. Dalton Trans 2015; 44:2639-49. [PMID: 25428593 DOI: 10.1039/c4dt02343a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A series of tetravalent uranium terephthalates has been solvothermally synthesized in the solvent N,N-dimethylformamide (DMF) at temperature 100-150 °C with different water amounts. Composition diagrams have been determined for the U(4+) metallic cation in the presence of terephthalic acid, and their crystal structures revealed the occurrence of two- or three-dimensional coordination polymers. In the absence of water, a mixture of two polytypes T-U(2)Cl(2)(bdc)(3)(DMF)(4) (1) and M-U(2)Cl(2)(bdc)(3)(DMF)(4) (2) has been identified at low temperature (100-110 °C) for bdc/U = 1-4 (bdc = terephthalate linker). Their structures are built up from isolated uranium centers in nine-fold coordination, surrounded by 6 carboxyl oxygen atoms, 2 oxygen atoms coming from DMF molecules and one chlorine atom. The uranium cations are linked to each other through the bdc ligand in order to generate a 3D framework. By increasing the temperature (130-150 °C), a layered like compound has been isolated, U(2)(bdc)(4)(DMF)(4) (3). It is composed of discrete actinide centers in ten-fold coordination, with 8 carboxyl oxygen atoms and 2 oxygen atoms from DMF molecules. The connection of the UO10 units with the bdc linkers generates 2D sheets. When a controlled amount of water is added to the reaction medium, the crystallization of the UiO-66-like U(6)O(4)(OH)(4)(H(2)O)(6)(bdc)(6)·10DMF solid (containing a hexanuclear sub-unit) is observed for temperature 110-120 °C and the H(2)O/U molar ratio in the range of 2-10. At higher temperature (140-150 °C), a distinct phase appeared, U(2)O(2)(bdc)(2)(DMF) (4), which consists of infinite chains of uranium centers, linked to each other via the bdc ligands. Higher water contents led to the formation of urania UO(2).
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Affiliation(s)
- Clément Falaise
- Unité de Catalyse et Chimie du Solide (UCCS) - UMR CNRS 8181, Université de Lille Nord de France, USTL-ENSCL, Bat C7, BP 90108, 59652 Villeneuve d'Ascq, France.
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Huang QR, Kingham JR, Kaltsoyannis N. The strength of actinide-element bonds from the quantum theory of atoms-in-molecules. Dalton Trans 2015; 44:2554-66. [PMID: 25307773 DOI: 10.1039/c4dt02323d] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[AnX(3)](2)(μ-η(2):η(2)-N(2)) (An = Th-Pu; X = F, Cl, Br, Me, H, OPh) have been studied using relativistic density functional theory. Geometric and vibrational data suggest that metal→N(2) charge transfer maximises at the protactinium systems, which feature the longest N-N bonds and the smallest σ(N-N), as a result of partial population of the N-N π* orbitals. There is very strong correlation of the standard quantum theory of atoms-in-molecules (QTAIM) metrics - bond critical point ρ, ∇(2)ρ and H and delocalisation indices - with An-N and N-N bond lengths and σ(N-N), but the correlation with An-N interaction energies is very poor. A similar situation exists for the other systems studied; neutral and cationic actinide monoxide and dioxides, and AnL(3+) and AnL(3)(3+) (L = pyridine (Py), pyrazine (Pz) and triazine (Tz)) with the exception of some of the ∇(2)ρ data, for which moderate to good correlations with energy data are sometimes seen. By contrast, in almost all cases there is very strong correlation of interaction and bond energies with |ΔQ(QTAIM)(An)|, a simple QTAIM metric which measures the amount of charge transferred to or from the actinide on compound formation.
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Affiliation(s)
- Qian-Rui Huang
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
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Monreal MJ, Thomson RK, Scott BL, Kiplinger JL. Enhancing the synthetic efficacy of thorium tetrachloride bis(1,2-dimethoxyethane) with added 1,2-dimethoxyethane: Preparation of metallocene thorium dichlorides. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.04.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Hashem E, Platts JA, Hartl F, Lorusso G, Evangelisti M, Schulzke C, Baker RJ. Thiocyanate complexes of uranium in multiple oxidation states: a combined structural, magnetic, spectroscopic, spectroelectrochemical, and theoretical study. Inorg Chem 2014; 53:8624-37. [PMID: 25072532 DOI: 10.1021/ic501236j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A comprehensive study of the complexes A4[U(NCS)8] (A = Cs, Et4N, (n)Bu4N) and A3[UO2(NCS)5] (A = Cs, Et4N) is described, with the crystal structures of [(n)Bu4N]4[U(NCS)8]·2MeCN and Cs3[UO2(NCS)5]·O0.5 reported. The magnetic properties of square antiprismatic Cs4[U(NCS)8] and cubic [Et4N]4[U(NCS)8] have been probed by SQUID magnetometry. The geometry has an important impact on the low-temperature magnetic moments: at 2 K, μeff = 1.21 μB and 0.53 μB, respectively. Electronic absorption and photoluminescence spectra of the uranium(IV) compounds have been measured. The redox chemistry of [Et4N]4[U(NCS)8] has been explored using IR and UV-vis spectroelectrochemical methods. Reversible 1-electron oxidation of one of the coordinated thiocyanate ligands occurs at +0.22 V vs Fc/Fc(+), followed by an irreversible oxidation to form dithiocyanogen (NCS)2 which upon back reduction regenerates thiocyanate anions coordinating to UO2(2+). NBO calculations agree with the experimental spectra, suggesting that the initial electron loss of [U(NCS)8](4-) is delocalized over all NCS(-) ligands. Reduction of the uranyl(VI) complex [Et4N]3[UO2(NCS)5] to uranyl(V) is accompanied by immediate disproportionation and has only been studied by DFT methods. The bonding in [An(NCS)8](4-) (An = Th, U) and [UO2(NCS)5](3-) has been explored by a combination of DFT and QTAIM analysis, and the U-N bonds are predominantly ionic, with the uranyl(V) species more ionic that the uranyl(VI) ion. Additionally, the U(IV)-NCS ion is more ionic than what was found for U(IV)-Cl complexes.
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Affiliation(s)
- Emtithal Hashem
- School of Chemistry, University of Dublin, Trinity College , College Green, Dublin 2, Ireland
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Hashem E, McCabe T, Schulzke C, Baker RJ. Synthesis, structure and photophysical properties of [UO2X2(OPPh3)2] (X = Cl, Br, I). Dalton Trans 2014; 43:1125-31. [DOI: 10.1039/c3dt52480a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hashem E, Lorusso G, Evangelisti M, McCabe T, Schulzke C, Platts JA, Baker RJ. Fingerprinting the oxidation state of U(iv) by emission spectroscopy. Dalton Trans 2013; 42:14677-80. [DOI: 10.1039/c3dt52151f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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