1
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Boreen MA, Ye CZ, Kerridge A, McCabe KN, Skeel BA, Maron L, Arnold J. Does Reduction-Induced Isomerization of a Uranium(III) Aryl Complex Proceed via C-H Oxidative Addition and Reductive Elimination across the Uranium(II/IV) Redox Couple? Inorg Chem 2022; 61:8955-8965. [PMID: 35654478 DOI: 10.1021/acs.inorgchem.2c01563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of the uranium(III) bis(amidinate) aryl complex {TerphC(NiPr)2}2U(Terph) (2, where Terph = 4,4″-di-tert-butyl-m-terphenyl-2'-yl) with a strong reductant enabled isolation of isomeric uranium(III) bis(amidinate) aryl product {TerphC(NiPr)2}2U(Terph*) (3, where Terph* = 4,4″-di-tert-butyl-m-terphenyl-4'-yl). In terms of connectivity, 3 differs from 2 only in the positions of the U-C and C-H bonds on the central aryl ring of the m-terphenyl-based ligand. A deuterium labeling study ruled out mechanisms for this isomerization involving intermolecular abstraction or deprotonation of the ligand C-H bonds activated during the reaction. Due to the complexity of this rapid, heterogeneous reaction, experimental studies could not further distinguish between two different intramolecular C-H activation mechanisms. However, high-level computational studies were consistent with a mechanism that included two sets of unimolecular, mononuclear C-H oxidative addition and reductive elimination steps involving uranium(II/IV).
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Affiliation(s)
- Michael A Boreen
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Christopher Z Ye
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, U.K
| | - Karl N McCabe
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, Toulouse 31077, France
| | - Brighton A Skeel
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Laurent Maron
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, Toulouse 31077, France
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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2
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Hakey BM, Leary DC, Lopez LM, Valerio LR, Brennessel WW, Milsmann C, Matson EM. Synthesis and Characterization of Pyridine Dipyrrolide Uranyl Complexes. Inorg Chem 2022; 61:6182-6192. [PMID: 35420825 PMCID: PMC9044449 DOI: 10.1021/acs.inorgchem.2c00348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The first actinide complexes of the pyridine dipyrrolide (PDP) ligand class, (MesPDPPh)UO2(THF) and (Cl2PhPDPPh)UO2(THF), are reported as the UVI uranyl adducts of the bulky aryl substituted pincers (MesPDPPh)2- and (Cl2PhPDPPh)2- (derived from 2,6-bis(5-(2,4,6-trimethylphenyl)-3-phenyl-1H-pyrrol-2-yl)pyridine (H2MesPDPPh, Mes = 2,4,6-trimethylphenyl), and 2,6-bis(5-(2,6-dichlorophenyl)-3-phenyl-1H-pyrrol-2-yl)pyridine (H2Cl2PhPDPPh, Cl2Ph = 2,6-dichlorophenyl), respectively). Following the in situ deprotonation of the proligand with lithium hexamethyldisilazide to generate the corresponding dilithium salts (e.g., Li2ArPDPPh, Ar = Mes of Cl2Ph), salt metathesis with [UO2Cl2(THF)2]2 afforded both compounds in moderate yields. The characterization of each species has been undertaken by a combination of solid- and solution-state methods, including combustion analysis, infrared, electronic absorption, and NMR spectroscopies. In both complexes, single-crystal X-ray diffraction has revealed a distorted octahedral geometry in the solid state, enforced by the bite angle of the rigid meridional (ArPDPPh)2- pincer ligand. The electrochemical analysis of both compounds by cyclic voltammetry in tetrahydrofuran (THF) reveals rich redox profiles, including events assigned as UVI/UV redox couples. A time-dependent density functional theory study has been performed on (MesPDPPh)UO2(THF) and provides insight into the nature of the transitions that comprise its electronic absorption spectrum.
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Affiliation(s)
- Brett M Hakey
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Dylan C Leary
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Lauren M Lopez
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Leyla R Valerio
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Carsten Milsmann
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Ellen M Matson
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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3
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Modder DK, Batov MS, Rajeshkumar T, Sienkiewicz A, Zivkovic I, Scopelliti R, Maron L, Mazzanti M. Assembling Diuranium Complexes in Different States of Charge with a Bridging Redox-Active Ligand. Chem Sci 2022; 13:11294-11303. [PMID: 36320571 PMCID: PMC9533398 DOI: 10.1039/d2sc03592h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/30/2022] [Indexed: 11/21/2022] Open
Abstract
Radical-bridged diuranium complexes are desirable for their potential high exchange coupling and single molecule magnet (SMM) behavior, but remain rare. Here we report for the first time radical-bridged diuranium(iv) and diuranium(iii) complexes. Reaction of [U{N(SiMe3)2}3] with 2,2′-bipyrimidine (bpym) resulted in the formation of the bpym-bridged diuranium(iv) complex [{((Me3Si)2N)3UIV}2(μ-bpym2−)], 1. Reduction with 1 equiv. KC8 reduces the complex, affording [K(2.2.2-cryptand)][{((Me3Si)2N)3U}2(μ-bpym)], 2, which is best described as a radical-bridged UIII–bpym˙−–UIII complex. Further reduction of 1 with 2 equiv. KC8, affords [K(2.2.2-cryptand)]2[{((Me3Si)2N)3UIII}2(μ-bpym2−)], 3. Addition of AgBPh4 to complex 1 resulted in the oxidation of the ligand, yielding the radical-bridged complex [{((Me3Si)2N)3UIV}2(μ-bpym˙−)][BPh4], 4. X-ray crystallography, electrochemistry, susceptibility data, EPR and DFT/CASSCF calculations are in line with their assignments. In complexes 2 and 4 the presence of the radical-bridge leads to slow magnetic relaxation. Convenient routes to dinuclear complexes of uranium where two uranium centers are bridged by the redox-active ligand bpym were identified resulting in unique and stable radical-bridged dimetallic complexes of U(iii) and U(iv) showing SMM behaviour.![]()
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Affiliation(s)
- Dieuwertje K Modder
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Mikhail S Batov
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Thayalan Rajeshkumar
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquées Cedex 4 31077 Toulouse France
| | - Andrzej Sienkiewicz
- Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
- ADSresonances Sàrl Route de Genève 60B 1028 Préverenges Switzerland
| | - Ivica Zivkovic
- Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Rosario Scopelliti
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquées Cedex 4 31077 Toulouse France
| | - Marinella Mazzanti
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
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4
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Gaiser AN, Celis-Barros C, White FD, Beltran-Leiva MJ, Sperling JM, Salpage SR, Poe TN, Gomez Martinez D, Jian T, Wolford NJ, Jones NJ, Ritz AJ, Lazenby RA, Gibson JK, Baumbach RE, Páez-Hernández D, Neidig ML, Albrecht-Schönzart TE. Creation of an unexpected plane of enhanced covalency in cerium(III) and berkelium(III) terpyridyl complexes. Nat Commun 2021; 12:7230. [PMID: 34893651 PMCID: PMC8664847 DOI: 10.1038/s41467-021-27576-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 11/30/2021] [Indexed: 11/28/2022] Open
Abstract
Controlling the properties of heavy element complexes, such as those containing berkelium, is challenging because relativistic effects, spin-orbit and ligand-field splitting, and complex metal-ligand bonding, all dictate the final electronic states of the molecules. While the first two of these are currently beyond experimental control, covalent M‒L interactions could theoretically be boosted through the employment of chelators with large polarizabilities that substantially shift the electron density in the molecules. This theory is tested by ligating BkIII with 4'-(4-nitrophenyl)-2,2':6',2"-terpyridine (terpy*), a ligand with a large dipole. The resultant complex, Bk(terpy*)(NO3)3(H2O)·THF, is benchmarked with its closest electrochemical analog, Ce(terpy*)(NO3)3(H2O)·THF. Here, we show that enhanced Bk‒N interactions with terpy* are observed as predicted. Unexpectedly, induced polarization by terpy* also creates a plane in the molecules wherein the M‒L bonds trans to terpy* are shorter than anticipated. Moreover, these molecules are highly anisotropic and rhombic EPR spectra for the CeIII complex are reported.
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Affiliation(s)
- Alyssa N Gaiser
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Cristian Celis-Barros
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Frankie D White
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Maria J Beltran-Leiva
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Joseph M Sperling
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Sahan R Salpage
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Todd N Poe
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Daniela Gomez Martinez
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Tian Jian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Nikki J Wolford
- Department of Chemistry, University of Rochester, Rochester, NY, 14627, USA
| | - Nathaniel J Jones
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Amanda J Ritz
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Robert A Lazenby
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - John K Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Ryan E Baumbach
- National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA
| | - Dayán Páez-Hernández
- Center for Applied Nanosciences, Universidad Andres Bello, República 275, Santiago, Chile
| | - Michael L Neidig
- Department of Chemistry, University of Rochester, Rochester, NY, 14627, USA
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5
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Ye Y, Jin J, Liang Y, Qin Z, Tang X, Feng Y, Lv M, Miao S, Li C, Chen Y, Chen F, Wang Y. Efficient and durable uranium extraction from uranium mine tailings seepage water via a photoelectrochemical method. iScience 2021; 24:103230. [PMID: 34712926 PMCID: PMC8531663 DOI: 10.1016/j.isci.2021.103230] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/08/2021] [Accepted: 09/30/2021] [Indexed: 11/28/2022] Open
Abstract
Current photocatalytic uranium (U) extraction methods have intrinsic obstacles, such as the recombination of charge carriers, and the deactivation of catalysts by extracted U. Here we show that, by applying a bias potential on the photocatalyst, the photoelectrochemical (PEC) method can address these limitations. We demonstrate that, owing to efficient spatial charge-carriers separation driven by the applied bias, the PEC method enables efficient and durable U extraction. The effects of multiple operation conditions are investigated. The U extraction proceeds via single-step one-electron reduction, resulting in the formation of pentavalent U, which can facilitate future studies on this often-overlooked U species. In real seepage water the PEC method achieves an extraction capacity of 0.67 gU m-3·h-1 without deactivation for 156 h continuous operation, which is 17 times faster than the photocatalytic method. This work provides an alternative tool for U resource recovery and facilitates future studies on U(V) chemistry.
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Affiliation(s)
- Yin Ye
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Jian Jin
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Yanru Liang
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Zemin Qin
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Xin Tang
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Yanyue Feng
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden
| | - Miao Lv
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Shiyu Miao
- College of Eco-Environmental Engineering, Qinghai University, Xining 810016, P. R. China
| | - Cui Li
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Yanlong Chen
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Fan Chen
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
| | - Yuheng Wang
- School of Ecology and Environment, Northwestern Polytechnical University, 710129 Xi’an, P. R. China
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6
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Loke SK, Pagadala E, Srinivasadesikan V, Thanapaul RJRS, Pooventhiran T, Thomas R, Naganjaneyulu G, Kottalanka RK. Unprecedented biological evaluation of Zn(II) complexes supported by “Self-adjustable” acyclic diiminodipyrromethane Schiff’s bases: DFT, molecular docking; biological activity studies. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108936] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Chaudhry MT, Akine S, MacLachlan MJ. Contemporary macrocycles for discrete polymetallic complexes: precise control over structure and function. Chem Soc Rev 2021; 50:10713-10732. [PMID: 34378585 DOI: 10.1039/d1cs00225b] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The growth of multimetallic clusters and complexes can proceed in the presence of suitable ligands, but often leads to polydisperse structures with poor solubility. As an alternative approach, macrocyclic molecules can anchor the multimetallic complex, directing its formation and stabilizing the resulting product. This approach can provide excellent control over the growth of clusters, and offers a handle to control solubility and other properties of the resulting complexes. In this Tutorial Review, we discuss recent activity (primarily the last two decades) directed at the controlled and reproducible synthesis of multimetallic complexes using macrocyclic ligands. Throughout the review, we focus on the unusual structures that are only accessible by using macrocycles as ligands, and their unique properties.
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Affiliation(s)
- Mohammad T Chaudhry
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
| | - Shigehisa Akine
- WPI Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan. .,Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan
| | - Mark J MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada. .,WPI Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan. .,Quantum Matter Institute, University of British Columbia, 2355 East Mall, Vancouver, BC, V6T 1Z4, Canada
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8
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Ortu F, Randall S, Moulding DJ, Woodward AW, Kerridge A, Meyer K, La Pierre HS, Natrajan LS. Photoluminescence of Pentavalent Uranyl Amide Complexes. J Am Chem Soc 2021; 143:13184-13194. [PMID: 34387466 PMCID: PMC8397311 DOI: 10.1021/jacs.1c05184] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Pentavalent uranyl species are crucial intermediates in transformations that play a key role for the nuclear industry and have recently been demonstrated to persist in reducing biotic and abiotic aqueous environments. However, due to the inherent instability of pentavalent uranyl, little is known about its electronic structure. Herein, we report the synthesis and characterization of a series of monomeric and dimeric, pentavalent uranyl amide complexes. These synthetic efforts enable the acquisition of emission spectra of well-defined pentavalent uranyl complexes using photoluminescence techniques, which establish a unique signature to characterize its electronic structure and, potentially, its role in biological and engineered environments via emission spectroscopy.
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Affiliation(s)
- Fabrizio Ortu
- Centre for Radiochemistry Resesarch, Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,School of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, U.K
| | - Simon Randall
- Centre for Radiochemistry Resesarch, Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - David J Moulding
- Centre for Radiochemistry Resesarch, Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Adam W Woodward
- Centre for Radiochemistry Resesarch, Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, U.K
| | - Karsten Meyer
- Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Inorganic Chemistry, Egerlandstr. 1, 91058 Erlangen, Germany
| | - Henry S La Pierre
- Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Inorganic Chemistry, Egerlandstr. 1, 91058 Erlangen, Germany.,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
| | - Louise S Natrajan
- Centre for Radiochemistry Resesarch, Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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9
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Revathi S, Raja P, Saha S, Eisen MS, Ghatak T. Recent developments in highly basic N-heterocyclic iminato ligands in actinide chemistry. Chem Commun (Camb) 2021; 57:5483-5502. [PMID: 34008633 DOI: 10.1039/d1cc00933h] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In the last decade, major conceptual advances in the chemistry of actinide molecules and materials have been made to demonstrate their distinct reactivity profiles as compared to lanthanide and transition metal compounds, but some difficult questions remain concerning the intriguing stability of low-valent actinide complexes, and the importance of the 5f-orbitals in reactivity and bonding. The imidazolin-2-iminato moiety has been extensively used in ligands for the advancement of actinide chemistry owing to its unique capability of stabilizing the reactive and highly electrophilic metal ions by virtue of its strong electron donation and steric tunability. The current review article describes recent developments in the chemistry of light actinide metal ions (thorium and uranium) bearing these N-heterocyclic iminato moieties as supporting ligands. In addition, the effect of ring expansion of the N-heterocycle on the catalytic aptitude of the organoactinides is also described herein. The synthesis and reactivity of actinide complexes bearing N-heterocyclic iminato ligands are presented, and promising apposite applications are also presented. The current review focuses on addressing the catalytic behavior of actinide complexes with oxygen-containing substrates such as in the Tishchenko reaction, hydroelementation processes, and polymerization reactions. Actinide complexes have also found new catalytic applications, as demonstrated by the potent chemoselective carbonyl hydroboration and tandem proton-transfer esterification (TPTE) reaction, featuring coupling between an aldehyde and alcohol.
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Affiliation(s)
- Shanmugam Revathi
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
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10
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Li JH, Luo F, Li JQ, Zhang SD. U=O activation in uranyl-organic framework through solid-liquid reaction: A powerful tool to modulate electronic and magnetic structure. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Zheng XJ, Bacha RUS, Su DM, Pan QJ. Relativistic DFT Probe for Reaction Energies and Electronic/Bonding Properties of Polypyrrolic Hetero-Bimetallic Actinide Complexes: Effects of Uranyl endo-Oxo Functionalization. Inorg Chem 2021; 60:5747-5756. [PMID: 33826313 DOI: 10.1021/acs.inorgchem.1c00008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A series of hetero-bimetallic actinide complexes of the Schiff-base polypyrrolic macrocycle (L), featuring cation-cation interactions (CCIs), were systematically investigated using relativistic density functional theory (DFT). The tetrahydrofuran (THF) solvated complex [(THF)(OUVIOUIV)(THF)(L)]2+ has high reaction free energy (ΔrG), and its replacement with electron-donating iodine promotes the reaction thermodynamics to obtain uranyl iodide [(I)(OUVIOUIV)(I)(L)]2+ (UVI-UIV). Retaining this coordination geometry, calculations have been extended to other An(IV) (An = Th, Pa, Np, Pu), i.e., for the substitution of U(IV) to obtain UVI-AnIV. As a consequence, the reaction free energy is appreciably lowered, suggesting the thermodynamic feasibility for the experimental synthesis of these bimetallic complexes. Among all UVI-AnIV, the electron-spin density and high-lying occupied orbitals of UVI-PaIV show a large extent of electron transfer from electron-rich Pa(IV) to electron-deficient U(VI), leading to a more stable UV-PaV oxidation state. Additionally, the shortest bond distance and the comparatively negative Eint of the Pa-Oendo bond suggest more positive and negative charges (Q) of Pa and endo-oxo atoms, respectively. As a result of the enhanced Pa-Oendo bond and strong CCI in UVI-PaIV along with the corresponding lowest reaction free energy among all of the optimized complexes, uranyl species is a better candidate for the experimental synthesis in the ultimate context of environmental remediation.
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Affiliation(s)
- Xiu-Jun Zheng
- Institute of Food and Environmental Engineering, East University of Heilongjiang, Harbin 150066, China
| | - Raza Ullah Shah Bacha
- Key Laboratory of Functional Inorganic Material Chemistry, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Dong-Mei Su
- State-Owned Assets Management Division, Harbin University, Harbin 150086, China
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
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12
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Wang X, Shi C, Gao M, Xu Y, Jiao Y, Wan J, Cao J, Chai Z, Diwu J. Study of the decorporation efficacy and toxicity of tetradentate 3-hydroxy-2-pyridinone ligands at the cellular level. RADIATION MEDICINE AND PROTECTION 2020. [DOI: 10.1016/j.radmp.2020.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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13
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Loke SK, Pagadala E, Devaraju S, Srinivasadesikan V, Kottalanka RK. New zinc complexes derived from "self-adaptable" acyclic diiminodipyrromethanes as potent catalysts for the reduction of curing temperature of bisphenol-A/F benzoxazines. RSC Adv 2020; 10:36275-36286. [PMID: 35517922 PMCID: PMC9057005 DOI: 10.1039/d0ra07837a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/22/2020] [Indexed: 01/17/2023] Open
Abstract
The simple modification of the Schiff-base ligands often brings significant changes in the coordination properties of the metal-complexes, providing newer prospects for their unexplored applications. In this context, the present work utilized the “self-adaptable” acyclic diiminodipyrromethane Schiff's bases (2a and 2b) for the synthesis of their Zn-based complexes and explored their potential in the ring-opening polymerization of benzoxazines. The two zinc complexes of composition [Zn{(Ph)(CH3)C(2,6-iPr2C6H3–N
Created by potrace 1.16, written by Peter Selinger 2001-2019
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CH–C4H2N)(2,6-iPr2C6H3–NCH–C4H2NH)}2] (3) and [ZnCl2{(Ph)(CH3)C(Ph3C–NHCH–C4H2N)2}] (4) were synthesized in good yields, and the structures were confirmed by single crystal X-ray diffraction (XRD). Later, zinc complexes (3 & 4) were used as catalysts to reduce the curing (ring-opening polymerization) temperature of benzoxazine monomers such as Bisphenol-A (BA-a) and Bisphenol-F (BF-a) benzoxazines. Dynamic scanning calorimetry (DSC) studies revealed that the on-set curing (Tp) temperatures were reasonably decreased upto 20% for the benzoxazines. Furthermore, the thermal stabilities of the polybenzoxazines (PBzs) derived in the presence of zinc catalysts (3 and 4) were compared with PBz obtained in the absence of catalyst under similar conditions. The thermal studies reveled that there is no significant changes in the initial degradation of polymers. However, the thermal stability in terms of char yields at 800 °C improved upto 10–21% for the bisphenol-A/F benzoxazines. The present work utilized the “self-adaptable” acyclic diiminodipyrromethane Schiff's bases (2a and 2b) for the synthesis of their Zn-based complexes and explored their potential in the ring-opening polymerization of BA-a and BF-a benzoxazines.![]()
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Affiliation(s)
- Shiva K Loke
- Division of Chemistry, Department of Sciences and Humanities, Vignan's Foundation for Science Technology and Research (Deemed to be University) Vadlamudi Guntur-522213 Andhra Pradesh India +91 863 2344 707 +91 863 2344 700
| | - Eswar Pagadala
- Division of Chemistry, Department of Sciences and Humanities, Vignan's Foundation for Science Technology and Research (Deemed to be University) Vadlamudi Guntur-522213 Andhra Pradesh India +91 863 2344 707 +91 863 2344 700
| | - S Devaraju
- Division of Chemistry, Department of Sciences and Humanities, Vignan's Foundation for Science Technology and Research (Deemed to be University) Vadlamudi Guntur-522213 Andhra Pradesh India +91 863 2344 707 +91 863 2344 700
| | - V Srinivasadesikan
- Division of Chemistry, Department of Sciences and Humanities, Vignan's Foundation for Science Technology and Research (Deemed to be University) Vadlamudi Guntur-522213 Andhra Pradesh India +91 863 2344 707 +91 863 2344 700
| | - Ravi K Kottalanka
- Division of Chemistry, Department of Sciences and Humanities, Vignan's Foundation for Science Technology and Research (Deemed to be University) Vadlamudi Guntur-522213 Andhra Pradesh India +91 863 2344 707 +91 863 2344 700
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15
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Kent GT, Murillo J, Wu G, Fortier S, Hayton TW. Coordination of Uranyl to the Redox-Active Calix[4]pyrrole Ligand. Inorg Chem 2020; 59:8629-8634. [PMID: 32492338 DOI: 10.1021/acs.inorgchem.0c01224] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reaction of [Li(THF)]4[L] (L = Me8-calix[4]pyrrole]) with 0.5 equiv of [UVIO2Cl2(THF)2]2 results in formation of the oxidized calix[4]pyrrole product, [Li(THF)]2[LΔ] (1), concomitant with formation of reduced uranium oxide byproducts. Complex 1 can also be generated by reaction of [Li(THF)]4[L] with 1 equiv of I2. We hypothesize that formation of 1 proceeds via formation of a highly oxidizing cis-uranyl intermediate, [Li]2[cis-UVIO2(calix[4]pyrrole)]. To test this hypothesis, we explored the reaction of 1 with either 0.5 equiv of [UVIO2Cl2(THF)2]2 or 1 equiv of [UVIO2(OTf)2(THF)3], which affords the isostructural uranyl complexes, [Li(THF)][UVIO2(LΔ)Cl(THF)] (2) and [Li(THF)][UVIO2(LΔ)(OTf)(THF)] (3), respectively. In the solid state, 2 and 3 feature unprecedented uranyl-η5-pyrrole interactions, making them rare examples of uranyl organometallic complexes. In addition, 2 and 3 exhibit some of the smallest O-U-O angles reported to date (2: 162.0(7) and 162.7(7)°; 3: 164.5(5)°). Importantly, the O-U-O bending observed in these complexes suggests that the oxidation of [Li(THF)]4[L] does indeed occur via an unobserved cis-uranyl intermediate.
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Affiliation(s)
- Greggory T Kent
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Jesse Murillo
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Skye Fortier
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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16
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Vanagas NA, Higgins RF, Wacker JN, Asuigui DRC, Warzecha E, Kozimor SA, Stoll SL, Schelter EJ, Bertke JA, Knope KE. Mononuclear to Polynuclear U
IV
Structural Units: Effects of Reaction Conditions on U‐Furoate Phase Formation. Chemistry 2020; 26:5872-5886. [DOI: 10.1002/chem.201905759] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Nicole A. Vanagas
- Department of Chemistry Georgetown University 37th and O Streets NW Washington, D.C. 20057 United States
| | - Robert F. Higgins
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia Pennsylvania 19104 United States
| | - Jennifer N. Wacker
- Department of Chemistry Georgetown University 37th and O Streets NW Washington, D.C. 20057 United States
- Los Alamos National Laboratory Los Alamos New Mexico 87545 United States
| | - Dane Romar C. Asuigui
- Department of Chemistry Georgetown University 37th and O Streets NW Washington, D.C. 20057 United States
| | - Evan Warzecha
- Department of Chemistry and Biochemistry Florida State University Tallahassee Florida 32306 United States
| | - Stosh A. Kozimor
- Los Alamos National Laboratory Los Alamos New Mexico 87545 United States
| | - Sarah L. Stoll
- Department of Chemistry Georgetown University 37th and O Streets NW Washington, D.C. 20057 United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia Pennsylvania 19104 United States
| | - Jeffery A. Bertke
- Department of Chemistry Georgetown University 37th and O Streets NW Washington, D.C. 20057 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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Assefa MK, Wu G, Hayton TW. Uranyl Oxo Silylation Promoted by Silsesquioxane Coordination. J Am Chem Soc 2020; 142:8738-8747. [PMID: 32292028 DOI: 10.1021/jacs.0c00990] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Mikiyas K. Assefa
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Trevor W. Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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Synthesis and Characterization of a Binuclear Copper(II)-dipyriamethyrin Complex: [Cu 2(dipyriamethyrin)(μ 2-1,1-acetato) 2]. MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25061446. [PMID: 32210058 PMCID: PMC7145289 DOI: 10.3390/molecules25061446] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/19/2020] [Accepted: 03/21/2020] [Indexed: 12/13/2022]
Abstract
The reaction between dipyriamethyrin and copper(II) acetate [Cu(OAc)2] afforded what is, to our knowledge, the first transition metal-dipyriamethyrin complex. Molecular and electronic characterization of this binuclear Cu(II) complex via EPR, UV-vis, and single crystal X-ray diffraction analysis revealed marked differences between the present constructs and previously reported binuclear copper(II) hexaphyrin species. UV-vis titration analyses provided evidence for a homotropic positive allosteric effect, wherein the binuclear species is formed without significant intermediacy of a monomeric complex.
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Izu H, Kondo M, Saga Y, Iwami H, Masaoka S. Rational Synthetic Strategy for Heterometallic Multinuclear Complexes. CHEM LETT 2020. [DOI: 10.1246/cl.190815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hitoshi Izu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Department of Life and Coordination-Complex Melecular Science, Institute for Molecular Science, 5-1 Myodaiji, Okazaki, Aichi 444-8787, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa 240-0193, Japan
| | - Mio Kondo
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yutaka Saga
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hikaru Iwami
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Department of Life and Coordination-Complex Melecular Science, Institute for Molecular Science, 5-1 Myodaiji, Okazaki, Aichi 444-8787, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa 240-0193, Japan
| | - Shigeyuki Masaoka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Oligonuclear Actinoid Complexes with Schiff Bases as Ligands-Older Achievements and Recent Progress. Int J Mol Sci 2020; 21:ijms21020555. [PMID: 31952278 PMCID: PMC7027032 DOI: 10.3390/ijms21020555] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/09/2020] [Accepted: 01/10/2020] [Indexed: 01/09/2023] Open
Abstract
Even 155 years after their first synthesis, Schiff bases continue to surprise inorganic chemists. Schiff-base ligands have played a major role in the development of modern coordination chemistry because of their relevance to a number of interdisciplinary research fields. The chemistry, properties and applications of transition metal and lanthanoid complexes with Schiff-base ligands are now quite mature. On the contrary, the coordination chemistry of Schiff bases with actinoid (5f-metal) ions is an emerging area, and impressive research discoveries have appeared in the last 10 years or so. The chemistry of actinoid ions continues to attract the intense interest of many inorganic groups around the world. Important scientific challenges are the understanding the basic chemistry associated with handling and recycling of nuclear materials; investigating the redox properties of these elements and the formation of complexes with unusual metal oxidation states; discovering materials for the recovery of trans-{UVIO2}2+ from the oceans; elucidating and manipulating actinoid-element multiple bonds; discovering methods to carry out multi-electron reactions; and improving the 5f-metal ions’ potential for activation of small molecules. The study of 5f-metal complexes with Schiff-base ligands is a currently “hot” topic for a variety of reasons, including issues of synthetic inorganic chemistry, metalosupramolecular chemistry, homogeneous catalysis, separation strategies for nuclear fuel processing and nuclear waste management, bioinorganic and environmental chemistry, materials chemistry and theoretical chemistry. This almost-comprehensive review, covers aspects of synthetic chemistry, reactivity and the properties of dinuclear and oligonuclear actinoid complexes based on Schiff-base ligands. Our work focuses on the significant advances that have occurred since 2000, with special attention on recent developments. The review is divided into eight sections (chapters). After an introductory section describing the organization of the scientific information, Sections 2 and 3 deal with general information about Schiff bases and their coordination chemistry, and the chemistry of actinoids, respectively. Section 4 highlights the relevance of Schiff bases to actinoid chemistry. Sections 5–7 are the “main menu” of the scientific meal of this review. The discussion is arranged according the actinoid (only for Np, Th and U are Schiff-base complexes known). Sections 5 and 7 are further arranged into parts according to the oxidation states of Np and U, respectively, because the coordination chemistry of these metals is very much dependent on their oxidation state. In Section 8, some concluding comments are presented and a brief prognosis for the future is attempted.
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Tecmer P, Schindler F, Leszczyk A, Boguslawski K. Mixed uranyl and neptunyl cation–cation interaction-driven clusters: structures, energetic stability, and nuclear quadrupole interactions. Phys Chem Chem Phys 2020; 22:10845-10852. [DOI: 10.1039/d0cp01068e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a quantum-chemical study of mixed CCI clusters, their structures, energetic stability, and nuclear quadrupole interactions.
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Affiliation(s)
- Paweł Tecmer
- Institute of Physics
- Faculty of Physics, Astronomy, and Informatics
- Nicolaus Copernicus University in Toruń, Grudziadzka 5
- 87-100 Torun
- Poland
| | - Frank Schindler
- Faculty of Physics
- University of Vienna
- Boltzmanngasse 5
- 1090 Vienna
- Austria
| | - Aleksandra Leszczyk
- Institute of Physics
- Faculty of Physics, Astronomy, and Informatics
- Nicolaus Copernicus University in Toruń, Grudziadzka 5
- 87-100 Torun
- Poland
| | - Katharina Boguslawski
- Institute of Physics
- Faculty of Physics, Astronomy, and Informatics
- Nicolaus Copernicus University in Toruń, Grudziadzka 5
- 87-100 Torun
- Poland
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Zhang Q, Jin B, Zheng T, Tang X, Guo Z, Peng R. Hexadentate β-Dicarbonyl(bis-catecholamine) Ligands for Efficient Uranyl Cation Decorporation: Thermodynamic and Antioxidant Activity Studies. Inorg Chem 2019; 58:14626-14634. [PMID: 31613591 DOI: 10.1021/acs.inorgchem.9b02306] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The special linear dioxo cation structure of the uranyl cation, which relegates ligand coordination to an equatorial plane perpendicular to the O═U═O vector, poses an unusual challenge for the rational design of efficient chelating agents. Therefore, the planar hexadentate ligand rational design employed in this work incorporates two bidentate catecholamine (CAM) chelating moieties and a flexible linker with a β-dicarbonyl chelating moiety (β-dicarbonyl(CAM)2 ligands). The solution thermodynamics of β-dicarbonyl(CAM)2 with a uranyl cation was investigated by potentiometric and spectrophotometric titrations. The results demonstrated that the pUO22+ values are significantly higher than for the previously reported TMA(2Li-1,2-HOPO)2, and efficient chelation of the uranyl cation was realized by the planar hexadentate β-dicarbonyl(CAM)2. The efficient chelating ability of β-dicarbonyl(CAM)2 was attributed to the presence of the more flexible β-dicarbonyl chelating linker and planar hexadentate structure, which favors the geometric arrangement between ligand and uranyl coordinative preference. Meanwhile, β-dicarbonyl(CAM)2 also exhibits higher antiradical efficiency in comparison to butylated hydroxyanisole. These results indicated that β-dicarbonyl(CAM)2 has potential application prospects as a chelating agent for efficient chelation of a uranyl cation.
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Affiliation(s)
- Qingchun Zhang
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Bo Jin
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Tian Zheng
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Xingyan Tang
- Sichuan Research Center of New Materials, Institute of Chemical Materials , China Academy of Engineering Physics , Chengdu 610200 , People's Republic of China
| | - Zhicheng Guo
- School of National Defense Science and Technology , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
| | - Rufang Peng
- State Key Laboratory of Environment-friendly Energy Materials , Southwest University of Science and Technology , Mianyang 621010 , People's Republic of China
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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
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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.
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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
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Palumbo CT, Barluzzi L, Scopelliti R, Zivkovic I, Fabrizio A, Corminboeuf C, Mazzanti M. Tuning the structure, reactivity and magnetic communication of nitride-bridged uranium complexes with the ancillary ligands. Chem Sci 2019; 10:8840-8849. [PMID: 31803458 PMCID: PMC6853081 DOI: 10.1039/c9sc02149c] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 08/06/2019] [Indexed: 11/23/2022] Open
Abstract
The reactivity of the nitride ligand is increased in complexes of uranium(iv) when bound by the OSi(OtBu)3 ligand as opposed to N(SiMe3)2, but magnetic exchange coupling is decreased.
Molecular uranium nitride complexes were prepared to relate their small molecule reactivity to the nature of the U
Created by potrace 1.16, written by Peter Selinger 2001-2019
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Created by potrace 1.16, written by Peter Selinger 2001-2019
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U bonding imposed by the supporting ligand. The U4+–U4+ nitride complexes, [NBu4][{((tBuO)3SiO)3U}2(μ-N)], [NBu4]-1, and [NBu4][((Me3Si)2N)3U}2(μ-N)], 2, were synthesised by reacting NBu4N3 with the U3+ complexes, [U(OSi(OtBu)3)2(μ-OSi(OtBu)3)]2 and [U(N(SiMe3)2)3], respectively. Oxidation of 2 with AgBPh4 gave the U4+–U5+ analogue, [((Me3Si)2N)3U}2(μ-N)], 4. The previously reported methylene-bridged U4+–U4+ nitride [Na(dme)3][((Me3Si)2)2U(μ-N)(μ-κ2-C,N-CH2SiMe2NSiMe3)U(N(SiMe3)2)2] (dme = 1,2-dimethoxyethane), [Na(dme)3]-3, provided a versatile precursor for the synthesis of the mixed-ligand U4+–U4+ nitride complex, [Na(dme)3][((Me3Si)2N)3U(μ-N)U(N(SiMe3)2)(OSi(OtBu)3)], 5. The reactivity of the 1–5 complexes was assessed with CO2, CO, and H2. Complex [NBu4]-1 displays similar reactivity to the previously reported heterobimetallic complex, [Cs{((tBuO)3SiO)3U}2(μ-N)], [Cs]-1, whereas the amide complexes 2 and 4 are unreactive with these substrates. The mixed-ligand complexes 3 and 5 react with CO and CO2 but not H2. The nitride complexes [NBu4]-1, 2, 4, and 5 along with their small molecule activation products were structurally characterized. Magnetic data measured for the all-siloxide complexes [NBu4]-1 and [Cs]-1 show uncoupled uranium centers, while strong antiferromagnetic coupling was found in complexes containing amide ligands, namely 2 and 5 (with maxima in the χ versus T plot of 90 K and 55 K). Computational analysis indicates that the U(μ-N) bond order decreases with the introduction of oxygen-based ligands effectively increasing the nucleophilicity of the bridging nitride.
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Affiliation(s)
- Chad T Palumbo
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
| | - Luciano Barluzzi
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
| | - Ivica Zivkovic
- Laboratory for Quantum Magnetism , Institute of Physics , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland
| | - Alberto Fabrizio
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
| | - Clémence Corminboeuf
- 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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Cowie BE, Purkis JM, Austin J, Love JB, Arnold PL. Thermal and Photochemical Reduction and Functionalization Chemistry of the Uranyl Dication, [UVIO2]2+. Chem Rev 2019; 119:10595-10637. [DOI: 10.1021/acs.chemrev.9b00048] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Bradley E. Cowie
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Jamie M. Purkis
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Jonathan Austin
- National Nuclear Laboratory, Chadwick House,
Warrington Road, Birchwood Park, Warrington WA3 6AE, U.K
| | - Jason B. Love
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Polly L. Arnold
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
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26
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Teyar B, Boucenina S, Belkhiri L, Le Guennic B, Boucekkine A, Mazzanti M. Theoretical Investigation of the Electronic Structure and Magnetic Properties of Oxo-Bridged Uranyl(V) Dinuclear and Trinuclear Complexes. Inorg Chem 2019; 58:10097-10110. [PMID: 31287673 DOI: 10.1021/acs.inorgchem.9b01237] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The uranyl(V) complexes [UO2(dbm)2K(18C6)]2 (dbm = dibenzoylmethanate) and [UO2(L)]3(L = 2-(4-tolyl)-1,3-bis(quinolyl)malondiiminate), exhibiting diamond-shaped U2O2 and triangular-shaped U3O3 cores respectively with 5f1-5f1 and 5f1-5f1-5f1 configurations, have been investigated using relativistic density functional theory (DFT). The bond order and QTAIM analyses reveal that the covalent contribution to the bonding within the oxo cores is slightly more important for U3O3 than for U2O2, in line with the shorter U-O distances existing in the trinuclear complex in comparison to those in the binuclear complex. Using the broken symmetry (BS) approach combined with the B3LYP functional for the calculation of the magnetic exchange coupling constants (J) between the magnetic centers, the antiferromagnetic (AF) character of these complexes was confirmed, the estimated J values being respectively equal to -24.1 and -7.2 cm-1 for the dioxo and trioxo species. It was found that the magnetic exchange is more sensitive to small variations of the core geometry of the dioxo species in comparison to the trioxo species. Although the robust AF exchange coupling within the UxOx cores is generally maintained when small variations of the UOU angle are applied, a weak ferromagnetic character appears in the dioxo species when this angle is higher than 114°, its value for the actual structure being equal to 105.9°. The electronic factors driving the magnetic coupling are discussed.
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Affiliation(s)
- Billel Teyar
- Faculté des Sciences Exactes , Université des Frères Mentouri , Laboratoire de Physique Mathématique et Subatomique LPMS, 25017 Constantine , Algeria.,Université Ziane Achour de Djelfa , 17000 Djelfa , Algeria
| | - Seddik Boucenina
- Faculté des Sciences Exactes , Université des Frères Mentouri , Laboratoire de Physique Mathématique et Subatomique LPMS, 25017 Constantine , Algeria
| | - Lotfi Belkhiri
- Faculté des Sciences Exactes , Université des Frères Mentouri , Laboratoire de Physique Mathématique et Subatomique LPMS, 25017 Constantine , Algeria
| | | | | | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland
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27
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Deubner HL, Rudel SS, Sachs M, Pietzonka C, Karttunen AJ, Ivlev SI, Müller M, Conrad M, Müller U, Kraus F. A Revised Structure Model for the UCl
6
Structure Type, Novel Modifications of UCl
6
and UBr
5
, and a Comment on the Modifications of Protactinium Pentabromides. Chemistry 2019; 25:6402-6411. [DOI: 10.1002/chem.201900389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Indexed: 11/08/2022]
Affiliation(s)
- H. Lars Deubner
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Stefan S. Rudel
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Malte Sachs
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Clemens Pietzonka
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Antti J. Karttunen
- Department of Chemistry and Materials ScienceAalto University 00076 Aalto Finland
| | - Sergei I. Ivlev
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Matthias Müller
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Matthias Conrad
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Ulrich Müller
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
| | - Florian Kraus
- Fachbereich ChemiePhilipps-Universität Marburg Hans-Meerwein-Straße 35032 Marburg Germany
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28
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Barluzzi L, Chatelain L, Fadaei-Tirani F, Zivkovic I, Mazzanti M. Facile N-functionalization and strong magnetic communication in a diuranium(v) bis-nitride complex. Chem Sci 2019; 10:3543-3555. [PMID: 30996946 PMCID: PMC6438153 DOI: 10.1039/c8sc05721d] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 02/08/2019] [Indexed: 11/21/2022] Open
Abstract
Uranium nitride complexes are of high interest because of their ability to effect dinitrogen reduction and functionalization and to promote magnetic communication, but studies of their properties and reactivity remain rare. Here we have prepared in 73% yield the diuranium(v) bis-nitride complex [K2{[U(OSi(O t Bu)3)3]2(μ-N)2}], 4, from the thermal decomposition of the nitride-, azide-bridged diuranium(iv) complex [K2{[U(OSi(O t Bu)3)3]2(μ-N)(μ-N3)}], 3. The bis-nitride 4 reacts in ambient conditions with 1 equiv. of CS2 and 1 equiv. of CO2 resulting in N-C bond formation to afford the diuranium(v) complexes [K2{[U(OSi(O t Bu)3)3]2(μ-N)(μ-S)(μ-NCS)}], 5 and [K2{[U(OSi(O t Bu)3)3]2(μ-N)(μ-O)(μ-NCO)}], 6, respectively. Both nitrides in 4 react with CO resulting in oxidative addition of CO to one nitride and CO cleavage by the second nitride to afford the diuranium(iv) complex [K2{[U(OSi(O t Bu)3)3]2(μ-CN)(μ-O)(μ-NCO)}], 7. Complex 4 also effects the remarkable oxidative cleavage of H2 in mild conditions to afford the bis-imido bridged diuranium(iv) complex [K2{[U(OSi(O t Bu)3)3]2(μ-NH)2}], 8 that can be further protonated to afford ammonia in 73% yield. Complex 8 provides a good model for hydrogen cleavage by metal nitrides in the Haber-Bosch process. The measured magnetic data show an unusually strong antiferromagnetic coupling between uranium(v) ions in the complexes 4 and 6 with Neel temperatures of 77 K and 60 K respectively, demonstrating that nitrides are attractives linkers for promoting magnetic communication in uranium complexes.
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Affiliation(s)
- Luciano Barluzzi
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Lucile Chatelain
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Farzaneh Fadaei-Tirani
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Ivica Zivkovic
- Laboratory for Quantum Magnetism , Institute of Physics , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
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29
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Abstract
Over the past 25 years, magnetic actinide complexes have been the object of considerable attention, not only at the experimental level, but also at the theoretical one. Such systems are of great interest, owing to the well-known larger spin–orbit coupling for actinide ions, and could exhibit slow relaxation of the magnetization, arising from a large anisotropy barrier, and magnetic hysteresis of purely molecular origin below a given blocking temperature. Furthermore, more diffuse 5f orbitals than lanthanide 4f ones (more covalency) could lead to stronger magnetic super-exchange. On the other hand, the extraordinary experimental challenges of actinide complexes chemistry, because of their rarity and toxicity, afford computational chemistry a particularly valuable role. However, for such a purpose, the use of a multiconfigurational post-Hartree-Fock approach is required, but such an approach is computationally demanding for polymetallic systems—notably for actinide ones—and usually simplified models are considered instead of the actual systems. Thus, Density Functional Theory (DFT) appears as an alternative tool to compute magnetic exchange coupling and to explore the electronic structure and magnetic properties of actinide-containing molecules, especially when the considered systems are very large. In this paper, relevant achievements regarding DFT investigations of the magnetic properties of actinide complexes are surveyed, with particular emphasis on some representative examples that illustrate the subject, including actinides in Single Molecular Magnets (SMMs) and systems featuring metal-metal super-exchange coupling interactions. Examples are drawn from studies that are either entirely computational or are combined experimental/computational investigations in which the latter play a significant role.
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30
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Transition-metal-bridged bimetallic clusters with multiple uranium–metal bonds. Nat Chem 2019; 11:248-253. [DOI: 10.1038/s41557-018-0195-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 11/22/2018] [Indexed: 11/08/2022]
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31
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Coughlin EJ, Qiao Y, Lapsheva E, Zeller M, Schelter EJ, Bart SC. Uranyl Functionalization Mediated by Redox-Active Ligands: Generation of O-C Bonds via Acylation. J Am Chem Soc 2019; 141:1016-1026. [PMID: 30532952 DOI: 10.1021/jacs.8b11302] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of uranyl compounds with the redox-active iminoquinone ligand have been synthesized, and their electronic structures elucidated using multinuclear NMR, EPR, electronic absorption spectroscopies, SQUID magnetometry, and X-ray crystallography. Characterization and analysis of the iminoquinone (iq0) complex, (dippiq)UO2(OTf)2THF (1-iq), the iminosemiquinone (isq1-) complex, (dippisq)2UO2THF (2-isq), and the amidophenolate (ap2-) complex, [(dippap)2UO2THF][K(18-crown-6)(THF)2]2(3-ap crown) show that reduction events are ligand-based, with the uranium center remaining in the hexavalent state. Reactivity of 2-isq with B-chlorocatecholborane or pivaloyl chloride leads to U-Ouranyl bond scission and reduction of U(VI) to U(IV) concomitant with ligand oxidation along with organic byproducts. 18O isotopic labeling experiments along with IR spectroscopy, mass spectrometry, and multinuclear NMR spectroscopy confirm that the organic byproducts contain oxygen atoms which originate from U-Ouranyl bond activation.
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Affiliation(s)
- Ezra J Coughlin
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , 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
| | - Ekaterina Lapsheva
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , United States
| | - Matthias Zeller
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , 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
| | - Suzanne C Bart
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
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32
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Higgins RF, Tatebe CJ, Bart SC, Shores MP. Excited-state effects on magnetic properties of U( iii) and U( iv) pyrazolylborate complexes. Chem Commun (Camb) 2019; 55:10611-10614. [DOI: 10.1039/c9cc04800f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
For a family of uranium pyrazolylborate complexes, we observe correlations between excited-state mixing and slow relaxation of magnetization for U(iii) complexes, and U⋯B distances in U(iv) complexes.
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Affiliation(s)
| | - Caleb J. Tatebe
- H. C. Brown Laboratory
- Department of Chemistry
- Purdue University
- West Lafayette
- USA
| | - Suzanne C. Bart
- H. C. Brown Laboratory
- Department of Chemistry
- Purdue University
- West Lafayette
- USA
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33
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Pankhurst JR, Paul S, Zhu Y, Williams CK, Love JB. Polynuclear alkoxy-zinc complexes of bowl-shaped macrocycles and their use in the copolymerisation of cyclohexene oxide and CO 2. Dalton Trans 2019; 48:4887-4893. [PMID: 30896006 DOI: 10.1039/c9dt00595a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The reactions between alcohols and the tetranuclear ethyl-Zn complexes of an ortho-phenylene-bridged polypyrrole macrocycle, Zn4Et4(L1) 1 and the related anthracenyl-bridged macrocyclic complex, Zn4Et4(THF)4(L2) 2 have been studied. With long-chain alcohols such as n-hexanol, the clean formation of the tetranuclear hexoxide complex Zn4(OC6H13)4(L1) 3 occurs. In contrast, the use of shorter-chain alcohols such as i-propanol results in the trinuclear complex Zn3(μ2-OiPr)2(μ3-OiPr)(HL1) 4 that arises from demetalation; this complex was characterised by X-ray crystallography. The clean formation of these polynuclear zinc clusters allowed a study of their use as catalysts in the ring-opening copolymerisation (ROCOP) reaction between cyclohexene oxide and CO2. In situ reactions involving the pre-catalyst 1 and n-hexanol formed the desired polymer with the best selectivity for polycarbonate (90%) at 30 atm CO2, whilst the activity and performance of pre-catalyst 2 was poor in comparison.
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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.
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34
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Zheng M, Chen FY, Li L, Guo YR, Pan QJ. Accessibility of Uranyl–Plutonium Complex Supported by a Polypyrrolic Macrocycle: An Implication for Experimental Synthesis. Inorg Chem 2018; 58:950-959. [DOI: 10.1021/acs.inorgchem.8b03112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ming Zheng
- Key Laboratory of Bio-Based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Fang-Yuan Chen
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Li Li
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Yuan-Ru Guo
- Key Laboratory of Bio-Based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
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35
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Cobb PJ, Moulding DJ, Ortu F, Randall S, Wooles AJ, Natrajan LS, Liddle ST. Uranyl-tri-bis(silyl)amide Alkali Metal Contact and Separated Ion Pair Complexes. Inorg Chem 2018; 57:6571-6583. [DOI: 10.1021/acs.inorgchem.8b00715] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Philip J. Cobb
- Centre for Radiochemistry Research, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - David J. Moulding
- Centre for Radiochemistry Research, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Fabrizio Ortu
- Centre for Radiochemistry Research, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Simon Randall
- Centre for Radiochemistry Research, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Ashley J. Wooles
- Centre for Radiochemistry Research, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Louise S. Natrajan
- Centre for Radiochemistry Research, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Stephen T. Liddle
- Centre for Radiochemistry Research, School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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36
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Cowie BE, Nichol GS, Love JB, Arnold PL. Double uranium oxo cations derived from uranyl by borane or silane reduction. Chem Commun (Camb) 2018; 54:3839-3842. [PMID: 29589007 PMCID: PMC5932998 DOI: 10.1039/c8cc00341f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new type of double uranium oxo cation [O-U-O-U-O]4+ is prepared by selective oxygen-atom abstraction from macrocyclic uranyl complexes using either boranes or silanes. A significant degree of multiple U[double bond, length as m-dash]O bonding is evident throughout the U2O3 core, but either trans-,cis- or trans-,trans-OUOUO motifs can be isolated as boron- or silicon-capped oxo complexes. Further controlled deoxygenation of the borylated system is also possible.
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Affiliation(s)
- Bradley E Cowie
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King's Buildings, Edinburgh, EH9 3FJ, UK.
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37
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Pattenaude SA, Coughlin EJ, Collins TS, Zeller M, Bart SC. Expanding the Library of Uranyl Amide Derivatives: New Complexes Featuring the tert-Butyldimethylsilylamide Ligand. Inorg Chem 2018; 57:4543-4549. [PMID: 29613782 DOI: 10.1021/acs.inorgchem.8b00298] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Scott A. Pattenaude
- H.C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Ezra J. Coughlin
- H.C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Tyler S. Collins
- H.C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Matthias Zeller
- H.C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Suzanne C. Bart
- H.C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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38
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Zheng M, Chen FY, Tian JN, Pan QJ. Electron-Transfer-Enhanced Cation–Cation Interactions in Homo- and Heterobimetallic Actinide Complexes: A Relativistic Density Functional Theory Study. Inorg Chem 2018; 57:3893-3902. [DOI: 10.1021/acs.inorgchem.8b00051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ming Zheng
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Fang-Yuan Chen
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Jia-Nan Tian
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
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39
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Scheibe B, Pietzonka C, Mustonen O, Karppinen M, Karttunen AJ, Atanasov M, Neese F, Conrad M, Kraus F. The [U 2 F 12 ] 2- Anion of Sr[U 2 F 12 ]. Angew Chem Int Ed Engl 2018; 57:2914-2918. [PMID: 29363236 DOI: 10.1002/anie.201800743] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Indexed: 11/10/2022]
Abstract
The D2h -symmetric dinuclear complex anion [U2 F12 ]2- of pastel green Sr[U2 F12 ] shows a hitherto unknown structural feature: The coordination polyhedra around the U atoms are edge-linked monocapped trigonal prisms, the UV atoms are therefore seven-coordinated. This leads to a U-U distance of 3.8913(6) Å. A weak UV -UV interaction is observed for the dinuclear [U2 F12 ]2- complex and described by the antiferromagnetic exchange Jexp of circa -29.9 cm-1 . The crystalline compound can be easily prepared from SrF2 and β-UF5 in anhydrous hydrogen fluoride (aHF) at room temperature. It was studied by means of single crystal X-ray diffraction, IR, Raman and UV/VIS spectroscopy, magnetic measurements, and by molecular as well as by solid-state quantum chemical calculations.
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Affiliation(s)
- Benjamin Scheibe
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany
| | - Clemens Pietzonka
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany
| | - Otto Mustonen
- Department of Chemistry, Aalto University, 00076, Aalto, Finland
| | - Maarit Karppinen
- Department of Chemistry, Aalto University, 00076, Aalto, Finland
| | | | - Mihail Atanasov
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Matthias Conrad
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany
| | - Florian Kraus
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany
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40
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Malthus SJ, Cameron SA, Brooker S. Improved Access to 1,8-Diformyl-carbazoles Leads to Metal-Free Carbazole-Based [2 + 2] Schiff Base Macrocycles with Strong Turn-On Fluorescence Sensing of Zinc(II) Ions. Inorg Chem 2018; 57:2480-2488. [PMID: 29442503 DOI: 10.1021/acs.inorgchem.7b02763] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Development of a new and high yielding synthetic route to 1,8-diformyl-carbazoles 3 (3a 3,6-di- tert-butyl substituted; 3b 3,6-unsubstituted) is reported. Use of a Heck coupling reaction, followed by ozonolysis, has greatly facilitated the preparation of these interesting head units in useful quantities. An initial foray into the new generations of Schiff base macrocycles that ready access to these head units (3) opens up, has led to the direct (i.e., metal-free) synthesis of two [2 + 2] macrocycles from 3a or 3b with 1,2-diaminoethane, H2LtBu (4a) and H2LH (4b), respectively, obtained as yellow powders in high yields (87-88%). The dizinc complex [Zn2LH(OAc)2] (5b) was isolated as a bright yellow solid in 83% yield, by 1:2:2 reaction of H2LH with zinc(II) acetate and triethylamine. Aldehydes 3a and 3b, macrocycle H2LH, and complex [Zn2LH(OAc)2] (5b) have been structurally characterized. The carbazole NH makes bifurcated hydrogen bonds with the pair of flanking 1,8-diformyl-moieties in 3, or 1,8-diimine-moieties in H2LH, leading to a flat, all- cis conformation. The stepped conformation of the metal-free macrocycle H2LH is retained in [Zn2LH(OAc)2], despite deprotonation and binding of two zinc(II) centers within the two tridentate pockets. The N3O2 coordination of the zinc ions is completed by one μ1,1- and one μ1,3- bridging acetate anion. Excitation of nanomolar [Zn2LH(OAc)2] in DMF at 335 nm results in clearly visible blue fluorescence (λmax = 460 nm). Further studies on the H2LH macrocycle revealed turn-on fluorescence, with selectivity (over Ca2+, Mg2+ and a range of 3d dications) and nanomolar sensitivity for zinc(II) ions, highlighting one of the many potential applications for these new carbazole-based Schiff base macrocycles.
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Affiliation(s)
- Stuart J Malthus
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Otago , P.O. Box 56 , Dunedin 9054 , New Zealand
| | - Scott A Cameron
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Otago , P.O. Box 56 , Dunedin 9054 , New Zealand
| | - Sally Brooker
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Otago , P.O. Box 56 , Dunedin 9054 , New Zealand
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41
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Scheibe B, Pietzonka C, Mustonen O, Karppinen M, Karttunen AJ, Atanasov M, Neese F, Conrad M, Kraus F. The [U2
F12
]2−
Anion of Sr[U2
F12
]. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800743] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Benjamin Scheibe
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Clemens Pietzonka
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Otto Mustonen
- Department of Chemistry; Aalto University; 00076 Aalto Finland
| | | | | | - Mihail Atanasov
- Max-Planck Institute for Chemical Energy Conversion; Stiftstrasse 34-36 45470 Mülheim an der Ruhr Germany
| | - Frank Neese
- Max-Planck Institute for Chemical Energy Conversion; Stiftstrasse 34-36 45470 Mülheim an der Ruhr Germany
| | - Matthias Conrad
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Florian Kraus
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
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42
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Abstract
Single Molecule Magnets (SMMs) based on transition metals and rare earths have been the object of considerable attention for the past 25 years. These systems exhibit slow relaxation of the magnetization, arising from a sizeable anisotropy barrier, and magnetic hysteresis of purely molecular origin below a given blocking temperature. Despite initial predictions that SMMs based on 5f-block elements could outperform most others, the results obtained so far have not met expectations. Exploiting the versatile chemistry of actinides and their favorable intrinsic magnetic properties proved, indeed, to be more difficult than assumed. However, the large majority of studies reported so far have been dedicated to uranium molecules, thus leaving the largest part of the 5f-block practically unexplored. Here, we present a short review of the progress achieved up to now and discuss some options for a possible way forward.
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43
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Zhang X, Wang Y, Morales-Martínez R, Zhong J, de Graaf C, Rodríguez-Fortea A, Poblet JM, Echegoyen L, Feng L, Chen N. U2@Ih(7)-C80: Crystallographic Characterization of a Long-Sought Dimetallic Actinide Endohedral Fullerene. J Am Chem Soc 2018; 140:3907-3915. [DOI: 10.1021/jacs.7b10865] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xingxing Zhang
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Yaofeng Wang
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Roser Morales-Martínez
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Jun Zhong
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Coen de Graaf
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain
- ICREA, Pg Lluis Companys 23, Barcelona 08010, Spain
| | - Antonio Rodríguez-Fortea
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Josep M. Poblet
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Luis Echegoyen
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, United States
| | - Lai Feng
- Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy & Collaborative, Soochow University, Suzhou, Jiangsu 215006, PR China
| | - Ning Chen
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China
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44
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Mullane KC, Cheisson T, Nakamaru-Ogiso E, Manor BC, Carroll PJ, Schelter EJ. Reduction of Carbonyl Groups by Uranium(III) and Formation of a Stable Amide Radical Anion. Chemistry 2018; 24:826-837. [PMID: 28873254 DOI: 10.1002/chem.201703396] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 12/25/2022]
Abstract
Methyl benzoate, N,N-dimethylbenzamide, and benzophenone were reduced by UIII [N(SiMe3 )2 ]3 resulting in uranium(IV) products. Reduction of benzophenone lead to UIV [OC⋅Ph2 )][N(SiMe3 )2 ]3 , (1.1) which forms the dinuclear complex, [N(SiMe3 )2 ]3 UIV (OCPhPh-CPh2 O)UIV [N(SiMe3 )2 ]3 (1.2), through coupling of the ketyl radical species upon crystallization. Reaction of N,N-dimethylbenzamide with UIII [N(SiMe3 )2 ]3 resulted in UIV [OC⋅(Ph)(NMe2 )][N(SiMe3 )2 ]3 (2), a uranium(IV) compound and the first example of a charge-separated amide radical. In the case of methyl benzoate, the reduction resulted in UIV (OMe)[N(SiMe3 )2 ]3 (3) and benzaldehyde as the reduced organic fragment. Compound 2 showed the ability to act as a uranium(III) synthon in its reactivity with trimethylsilyl azide, a reaction that yielded UV (=NSiMe3 )[N(SiMe3 )2 ]3 . Additionally, 2 was reduced with potassium graphite resulting in [U(μ-O)[O=C(NMe2 )(Ph)][N(SiMe3 )2 ]2 ]2 (4), a dinuclear uranium compound bridged by oxo ligands. Reduction of 2 in the presence of 15-crown-5 afforded isolation of the mono-oxo compound, [(15-crown-5)2 K][UO[N(SiMe3 )2 ]3 ] (5). The results expand the reduction capabilities of UIII complexes and demonstrate a strategy for isolating novel metal-stabilized radicals.
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Affiliation(s)
- Kimberly C Mullane
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34th St., Pennsylvania, 19104, USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34th St., Pennsylvania, 19104, USA
| | - Eiko Nakamaru-Ogiso
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, 19104, USA.,Mitochondrial Medicine Center, Children's Hospital of Philadelphia, Pennsylvania, 19104, USA
| | - Brian C Manor
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34th St., Pennsylvania, 19104, USA
| | - Patrick J Carroll
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34th St., Pennsylvania, 19104, USA
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34th St., Pennsylvania, 19104, USA
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45
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Bell NL, Arnold PL, Love JB. Controlling uranyl oxo group interactions to group 14 elements using polypyrrolic Schiff-base macrocyclic ligands. Dalton Trans 2018; 45:15902-15909. [PMID: 27356021 DOI: 10.1039/c6dt01948j] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Heterodinuclear uranyl/group 14 complexes of the aryl- and anthracenyl-linked Schiff-base macrocyclic ligands LMe and LA were synthesised by reaction of UO2(H2L) with M{N(SiMe3)2}2 (M = Ge, Sn, Pb). For complexes of the anthracenyl-linked ligand (LA) the group 14 metal sits out of the N4-donor plane by up to 0.7 Å resulting in relatively short MOUO distances which decrease down the group; however, the solid state structures and IR spectroscopic analyses suggest little interaction occurs between the oxo and group 14 metal. In contrast, the smaller aryl-linked ligand (LMe) enforces greater interaction between the metals; only the PbII complex was cleanly accessible although this complex was relatively unstable in the presence of HN(SiMe3)2 and some organic oxidants. In this case, the equatorial coordination of pyridine-N-oxide causes a 0.08 Å elongation of the endo UO bond and a clear interaction of the uranyl ion with the Pb(ii) cation in the second donor compartment.
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Affiliation(s)
- Nicola L Bell
- EaStCHEM School of chemistry, Joseph Black Building, The King's Buildings, The University of Edinburgh, West Mains Road, Edinburgh EH9 3FJ, UK.
| | - Polly L Arnold
- EaStCHEM School of chemistry, Joseph Black Building, The King's Buildings, The University of Edinburgh, West Mains Road, Edinburgh EH9 3FJ, UK.
| | - Jason B Love
- EaStCHEM School of chemistry, Joseph Black Building, The King's Buildings, The University of Edinburgh, West Mains Road, Edinburgh EH9 3FJ, UK.
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46
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Chaudhry MT, Lelj F, MacLachlan MJ. Expanded campestarene hosts for tetra- and dinuclear uranyl(vi) complexes. Chem Commun (Camb) 2018; 54:11869-11872. [DOI: 10.1039/c8cc07269h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Expanded campestarene macrocycles with keto–enamine structures host dinuclear and tetranuclear hydroxo-bridged uranyl(vi) clusters in their interiors.
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Affiliation(s)
| | - Francesco Lelj
- La.M.I. and LaSCAMM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata
- 85100 Potenza
- Italy
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47
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Hayton TW. Understanding the origins of Oyl–U–Oylbending in the uranyl (UO22+) ion. Dalton Trans 2018; 47:1003-1009. [DOI: 10.1039/c7dt04123c] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although rare, Oyl–U–Oylbending in the uranyl (UO22+) ion can be effected by either steric perturbation or electronic perturbation.
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Affiliation(s)
- Trevor W. Hayton
- Department of Chemistry and Biochemistry
- University of California Santa Barbara
- Santa Barbara
- USA
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48
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Niklas JE, Farnum BH, Gorden JD, Gorden AEV. Structural Characterization and Redox Activity of a Uranyl Dimer and Transition-Metal Complexes of a Tetradentate BIAN Ligand. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00454] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julie E. Niklas
- Department of Chemistry and Biochemistry, Auburn University, 179 Chemistry Building, Auburn, Alabama 36849, United States
| | - Byron H. Farnum
- Department of Chemistry and Biochemistry, Auburn University, 179 Chemistry Building, Auburn, Alabama 36849, United States
| | - John D. Gorden
- Department of Chemistry and Biochemistry, Auburn University, 179 Chemistry Building, Auburn, Alabama 36849, United States
| | - Anne E. V. Gorden
- Department of Chemistry and Biochemistry, Auburn University, 179 Chemistry Building, Auburn, Alabama 36849, United States
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49
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Arnold PL, Cowie BE, Suvova M, Zegke M, Magnani N, Colineau E, Griveau JC, Caciuffo R, Love JB. Axially Symmetric U−O−Ln- and U−O−U-Containing Molecules from the Control of Uranyl Reduction with Simple f-Block Halides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705197] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Polly L. Arnold
- EaStCHEM School of Chemistry; University of Edinburgh; The King's Buildings Edinburgh EH9 3FJ UK
| | - Bradley E. Cowie
- EaStCHEM School of Chemistry; University of Edinburgh; The King's Buildings Edinburgh EH9 3FJ UK
| | - Markéta Suvova
- EaStCHEM School of Chemistry; University of Edinburgh; The King's Buildings Edinburgh EH9 3FJ UK
| | - Markus Zegke
- EaStCHEM School of Chemistry; University of Edinburgh; The King's Buildings Edinburgh EH9 3FJ UK
| | - Nicola Magnani
- European Commission; Directorate for Nuclear Safety and Security, Joint Research Centre; Postfach 2340 76125 Karlsruhe Germany
| | - Eric Colineau
- European Commission; Directorate for Nuclear Safety and Security, Joint Research Centre; Postfach 2340 76125 Karlsruhe Germany
| | - Jean-Christophe Griveau
- European Commission; Directorate for Nuclear Safety and Security, Joint Research Centre; Postfach 2340 76125 Karlsruhe Germany
| | - Roberto Caciuffo
- European Commission; Directorate for Nuclear Safety and Security, Joint Research Centre; Postfach 2340 76125 Karlsruhe Germany
| | - Jason B. Love
- EaStCHEM School of Chemistry; University of Edinburgh; The King's Buildings Edinburgh EH9 3FJ UK
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50
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Arnold PL, Cowie BE, Suvova M, Zegke M, Magnani N, Colineau E, Griveau JC, Caciuffo R, Love JB. Axially Symmetric U-O-Ln- and U-O-U-Containing Molecules from the Control of Uranyl Reduction with Simple f-Block Halides. Angew Chem Int Ed Engl 2017; 56:10775-10779. [PMID: 28686336 PMCID: PMC5697649 DOI: 10.1002/anie.201705197] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 06/23/2017] [Indexed: 11/08/2022]
Abstract
The reduction of UVI uranyl halides or amides with simple LnII or UIII salts forms highly symmetric, linear, oxo-bridged trinuclear UV /LnIII /UV , LnIII /UIV /LnIII , and UIV /UIV /UIV complexes or linear LnIII /UV polymers depending on the stoichiometry and solvent. The reactions can be tuned to give the products of one- or two-electron uranyl reduction. The reactivity and magnetism of these compounds are discussed in the context of using a series of strongly oxo-coupled homo- and heterometallic poly(f-block) chains to better understand fundamental electronic structure in the f-block.
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Affiliation(s)
- Polly L Arnold
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh, EH9 3FJ, UK
| | - Bradley E Cowie
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh, EH9 3FJ, UK
| | - Markéta Suvova
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh, EH9 3FJ, UK
| | - Markus Zegke
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh, EH9 3FJ, UK
| | - Nicola Magnani
- European Commission, Directorate for Nuclear Safety and Security, Joint Research Centre, Postfach 2340, 76125, Karlsruhe, Germany
| | - Eric Colineau
- European Commission, Directorate for Nuclear Safety and Security, Joint Research Centre, Postfach 2340, 76125, Karlsruhe, Germany
| | - Jean-Christophe Griveau
- European Commission, Directorate for Nuclear Safety and Security, Joint Research Centre, Postfach 2340, 76125, Karlsruhe, Germany
| | - Roberto Caciuffo
- European Commission, Directorate for Nuclear Safety and Security, Joint Research Centre, Postfach 2340, 76125, Karlsruhe, Germany
| | - Jason B Love
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh, EH9 3FJ, UK
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