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Brager DM, Panchal AJ, Cahill CL. A Spectroscopic and Computational Evaluation of Uranyl Oxo Engagement with Transition Metal Cations. Inorg Chem 2024; 63:11155-11167. [PMID: 38829561 DOI: 10.1021/acs.inorgchem.4c00831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
We report the synthesis and characterization of five novel Cd2+/UO22+ heterometallic complexes that feature Cd-oxo distances ranging from 78 to 171% of the sum of the van der Waals radii for these atoms. This work marks an extension of our previously reported Pb2+/UO22+ and Ag+/UO22+ complexes, yet with much more pronounced structural and spectroscopic effects resulting from Cd-oxo interactions. We observe a major shift in the U═O symmetric stretch and significant uranyl bond length asymmetry. The ρbcp values calculated using Quantum Theory of Atoms in Molecules (QTAIM) support the asymmetry displayed in the structural data and indicate a decrease in covalent character in U═O bonds with close Cd-oxo contacts, more so than in related compounds containing Pb2+ and Ag+. Second-order perturbation theory (SOPT) analysis reveals that O spx → Cd s is the most significant orbital overlap and U═O bonding and antibonding orbitals also contribute to the interaction (U═O σ/π → Cd d and Cd s → U═O σ/π*). The overall stabilization energies for these interactions were lower than those in previously reported Pb2+ cations, yet larger than related Ag+ compounds. Analysis of the equatorial coordination sphere of the Cd2+/UO22+ compounds (along with Pb2+/UO22+ complexes) reveals that 7-coordinate uranium favors closer, stronger Mn+-oxo contacts. These results indicate that U═O bond strength tuning is possible with judicious choice of metal cations for oxo interactions and equatorial ligand coordination.
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Affiliation(s)
- Dominique M Brager
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, District of Columbia 20052, United States
| | - Ahan J Panchal
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, District of Columbia 20052, United States
| | - Christopher L Cahill
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, District of Columbia 20052, United States
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2
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Decoteau EA, Raghavan A, Cahill CL. Structural, Spectroscopic, and Computational Analysis of Halogen- and Hydrogen-Bonding Effects within a Series of Uranyl Fluorides with 4-Halopyridinium. Inorg Chem 2024; 63:2495-2504. [PMID: 38266166 DOI: 10.1021/acs.inorgchem.3c03699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
Reported are the syntheses and characterization of five compounds containing one-dimensional uranyl fluoride chains charge balanced by 4-X-pyridinium (X = H, F, Cl, Br, I) cations. Structural analysis reveals molecular assembly via noncovalent interactions in the second coordination sphere with the X···Oyl interaction distances ranging from 2.987(7) to 3.142(3) Å, all of which are less than or close to the sum of the van der Waals radii. These interactions were probed via luminescence and Raman spectroscopy, where the latter indicates slight differences in the U═O symmetric stretches as a consequence of U═O in-phase and out-of-phase Raman-active stretches. The decrease in the X···Oyl sum of the van der Waals overlap between comparable compounds within the series manifests as a red-shifting trend among the Raman symmetric stretches. Computational density functional theory (DFT)-based frequency, electrostatic potential surfaces (ESPs), and natural bonding orbital (NBO) methods support the observed Raman spectroscopic features and provide a comprehensive rationale for assembly.
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Affiliation(s)
- Elizabeth A Decoteau
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, District of Columbia 20052, United States
| | - Adharsh Raghavan
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, District of Columbia 20052, United States
| | - Christopher L Cahill
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, District of Columbia 20052, United States
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Brager DM, Marwitz AC, Cahill CL. A spectroscopic, structural, and computational study of Ag-oxo interactions in Ag +/UO 22+ complexes. Dalton Trans 2022; 51:10095-10120. [PMID: 35731043 DOI: 10.1039/d2dt01161a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Twelve novel Ag+/UO22+ heterometallic complexes have been prepared and characterized via structural, spectroscopic, and computational methods to probe the effects of Ag-oxo interactions on bonding and photophysical properties of the uranyl cation. Structural characterization reveals Ag-oxo interaction distances ranging from 2.475(3) Å to 4.287(4) Å. These interactions were probed using luminescence and Raman spectroscopy which displayed little effect on the luminescence intensity and the energy of the Raman active UO symmetric stretch peak as compared to previously reported Pb-oxo interactions. Computational efforts via density functional theory-based natural bond orbital analysis revealed that the highest stabilization energy associated with the Ag-oxo interaction had a value of only 11.03 kcal mol-1 and that all other energy values fell at 7.05 kcal mol-1 or below indicating weaker interactions relative to those previously reported for Pb2+/UO22+ heterometallic compounds. In contrast, quantum theory of atoms in molecules analysis of bond critical point electron density values indicated higher electron density in Ag-oxo interactions as compared to Pb-oxo interactions which suggests more covalent character with the Ag+. Overall, this data indicates that Ag+ has a less significant effect on UO22+ bonding and photophysical properties as compared to other Pb2+, likely due to the high polarizability of the cation.
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Affiliation(s)
- Dominique M Brager
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, DC, 20052, USA.
| | | | - Christopher L Cahill
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, DC, 20052, USA.
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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: 2] [Impact Index Per Article: 1.0] [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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5
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Brager DM, Nicholas AD, Schofield MH, Cahill CL. Pb-Oxo Interactions in Uranyl Hybrid Materials: A Combined Experimental and Computational Analysis of Bonding and Spectroscopic Properties. Inorg Chem 2021; 60:17186-17200. [PMID: 34727497 DOI: 10.1021/acs.inorgchem.1c02518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reported are the syntheses and characterization of six new heterometallic UO22+/Pb2+ compounds. These materials feature rare instances of M-oxo interactions, which influence the bonding properties of the uranyl cation. The spectroscopic effects of these interactions were measured using luminescence and Raman spectroscopy. Computational density functional theory-based natural bonding orbital and quantum theory of atoms in molecules methods indicate interactions arise predominantly through charge transfer between cationic units via the electron-donating uranyl O spx lone pair orbitals and electron-accepting Pb2+ p orbitals. The interaction strength varies as a function of Pb-oxo interaction distance and angle with energy values ranging from 0.47 kcal/mol in the longer contacts to 21.94 kcal/mol in the shorter contacts. Uranyl units with stronger interactions at the oxo display an asymmetric bond weakening and a loss of covalent character in the U═O bonds interacting closely with the Pb2+ ion. Luminescence quenching is observed in cases in which strong Pb-oxo interactions are present and is accompanied by red-shifting of the uranyl symmetric Raman stretch. Changes to inner sphere uranyl bonding manifest as a weakening of the U═O bond as a result of interaction with the Pb2+ ion. Comprehensive evaluation of the effects of metal ions on uranyl spectra supports modeling efforts probing uranyl bonding and may inform applications such as forensic signatures.
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Affiliation(s)
- Dominique M Brager
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, D.C. 20052, United States
| | - Aaron D Nicholas
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, D.C. 20052, United States
| | - Mark H Schofield
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, D.C. 20052, United States
| | - Christopher L Cahill
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, D.C. 20052, United States
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Eickhoff L, Ohms L, Bresien J, Villinger A, Michalik D, Schulz A. A Phosphorus-Based Pacman Dication Generated by Cooperative Self-Activation of a Pacman Phosphane. Chemistry 2021; 28:e202103983. [PMID: 34761445 PMCID: PMC9298836 DOI: 10.1002/chem.202103983] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Indexed: 11/08/2022]
Abstract
Formal coordination of phosphorus(III) by a calix[4]pyrrole Schiff base ligand was achieved through the reaction of this ligand with PCl3 under basic conditions. The reaction product adopts a Pacman conformation with two P-Cl moieties, one in exo and one in endo position. It represents the first non-metal compound of calix[4]pyrrole Schiff base ligands and of Pacman ligands in general. The spatial neighborhood of the two phosphorus atoms enables cooperative reactions. As a first example, the chloride abstraction with AgOTf is presented, yielding a macrocyclic dication with two embedded phosphorus(III) monocations, which both undergo a cooperative, internal activation reaction with an adjacent C=N double bond. This intramolecular redox process affords two pentacoordinated phosphorus(V) centers within the Pacman dication. All reaction products were fully characterized and all results are supported by computations.
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Affiliation(s)
- Liesa Eickhoff
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Leon Ohms
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Jonas Bresien
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Alexander Villinger
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Dirk Michalik
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059, Rostock, Germany.,Leibniz-Institut für Katalyse e. V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Axel Schulz
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059, Rostock, Germany.,Leibniz-Institut für Katalyse e. V., Albert-Einstein-Str. 29a, 18059, Rostock, Germany
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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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Van Stipdonk MJ, Perez EH, Metzler LJ, Bubas AR, Corcovilos T, Somogyi A. Destruction and reconstruction of UO 22+ using gas-phase reactions. Phys Chem Chem Phys 2021; 23:11844-11851. [PMID: 33988189 DOI: 10.1039/d1cp01520f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
While the strong axial U[double bond, length as m-dash]O bonds confer high stability and inertness to UO22+, it has been shown that the axial oxo ligands can be eliminated or replaced in the gas-phase using collision-induced dissociation (CID) reactions. We report here tandem mass spectrometry experiments initiated with a gas-phase complex that includes UO22+ coordinated by a 2,6-difluorobenzoate ligand. After decarboxylation to form a difluorophenide coordinated uranyl ion, [UO2(C6F2H3)]+, CID causes elimination of CO, and then CO and C2H2 in sequential dissociation steps, to leave a reactive uranium fluoride ion, [UF2(C2H)]+. Reaction of [UF2(C2H)]+ with CH3OH creates [UF2(OCH3)]+, [UF(OCH3)2]+ and [UF(OCH3)2(CH3OH)]+. Cleavage of C-O bonds within these species results in the elimination of methyl cation (CH3+). Subsequent CID steps convert [UF(OCH3)2]+ to [UO2(F)]+ and similarly, [U(OCH3)3]+ to [UO2(OCH3)]+. Our experiments show removal of both uranyl oxo ligands in "top-down" CID reactions and replacement in "bottom-up" ion-molecule and dissociation steps.
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Affiliation(s)
- Michael J Van Stipdonk
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Ave., 308 Mellon Hall, Pittsburgh, PA 15282, USA.
| | - Evan H Perez
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Ave., 308 Mellon Hall, Pittsburgh, PA 15282, USA.
| | - Luke J Metzler
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Ave., 308 Mellon Hall, Pittsburgh, PA 15282, USA.
| | - Amanda R Bubas
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Ave., 308 Mellon Hall, Pittsburgh, PA 15282, USA.
| | | | - Arpad Somogyi
- Campus Chemical Instrument Center, The Ohio State University, Columbus, OH 43210, USA
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Metzler LJ, Farmen CT, Corcovilos TA, Van Stipdonk MJ. Intrinsic chemistry of [OUCH] +: reactions with H 2O, CH 3C[triple bond, length as m-dash]N and O 2. Phys Chem Chem Phys 2021; 23:4475-4479. [PMID: 33598672 DOI: 10.1039/d1cp00177a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first experimental study of the intrinsic chemistry of a U-methylidyne species, focusing on reaction of [OUCH]+ with H2O, O2 and CH3C[triple bond, length as m-dash]N in the gas phase. DFT was also used to determine reaction pathways, and establish the mechanism by which [OUCH]+ is formed through collision-induced dissociation of [UO2(C[triple bond, length as m-dash]CH)]+.
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Affiliation(s)
- Luke J Metzler
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Ave., Pittsburgh, PA 15282, USA.
| | - Christopher T Farmen
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Ave., Pittsburgh, PA 15282, USA.
| | - Theodore A Corcovilos
- Department of Physics, Duquesne University, 600 Forbes Ave., Pittsburgh, PA 15282, USA
| | - Michael J Van Stipdonk
- Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Ave., Pittsburgh, PA 15282, USA.
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Thuéry P, Harrowfield J. Cavity Formation in Uranyl Ion Complexes with Kemp's Tricarboxylate: Grooved Diperiodic Nets and Polynuclear Cages. Inorg Chem 2021; 60:1683-1697. [PMID: 33435670 DOI: 10.1021/acs.inorgchem.0c03205] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Kemp's triacid (cis,cis-1,3,5-trimethylcyclohexane-1,3,5-tricarboxylic acid, H3kta) was reacted with uranyl nitrate under solvo-hydrothermal conditions in the presence of diverse counterions or additional metal cations to give eight zero- or diperiodic complexes. All the coordination polymers in the series, [PPh3Me][UO2(kta)]·0.5H2O (1), [PPh4][UO2(kta)] (2), [C(NH2)3][UO2(kta)] (3), [Cd(bipy)3][UO2(kta)]2 (4), and [Zn(phen)3][UO2(kta)]2·2H2O (5) (bipy = 2,2'-bipyridine, phen = 1,10-phenanthroline) crystallize as networks with the hcb topology, the ligand being in the chair conformation with the three carboxylate groups equatorial, except in 3, in which the axial/diequatorial boat conformation is present. Various degrees of corrugation and different arrangements of neighboring layers are observed depending on the counterion, with complexes 4 and 5, in particular, displaying cavities containing the bulky cations. [Co(en)3]2[(UO2)2(kta)(Hkta)2]2·2NMP·10H2O (6) (en = 1,2-ethanediamine; NMP = N-methyl-2-pyrrolidone) contains a metallatricyclic, tetranuclear anionic species, displaying two clefts in which the cations are held by extensive hydrogen bonding, and with the ligands in both triaxial chair and axial/diequatorial boat conformations. [(UO2)3Pb(kta)2(Hkta)(H2O)]2·1.5THF (7) (THF = tetrahydrofuran) and [(UO2)2Pb2(kta)2(Hkta)(NMP)]2 (8) are two heterometallic cage compounds containing only the convergent, triaxial chair form of the ligand, which have the same topology in spite of the different U/Pb ratio. These complexes are compared to previous ones also involving Kemp's triacid anions, and the roles of ligand conformation and of counterions in the formation of cavities, either in cage-like species or as grooves in diperiodic networks, is discussed.
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Affiliation(s)
- Pierre Thuéry
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Jack Harrowfield
- Université de Strasbourg, ISIS, 8 allée Gaspard Monge, 67083 Strasbourg, France
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Kretzschmar J, Tsushima S, Drobot B, Steudtner R, Schmeide K, Stumpf T. Trimeric uranyl(vi)-citrate forms Na +, Ca 2+, and La 3+ sandwich complexes in aqueous solution. Chem Commun (Camb) 2020; 56:13133-13136. [PMID: 33006343 DOI: 10.1039/d0cc05460g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
M. Basile, et al., Chem. Commun., 2015, 51, 5306-5309, showed that a sodium ion is sandwiched by uranyl(vi) oxygen atoms of two 3 : 3 uranyl(vi)-citrate complex molecules in single-crystals. By means of NMR spectroscopy supported by DFT calculations we provide unambiguous evidence for this complex to persist in aqueous solution above a critical concentration of 3 mM uranyl citrate. Unprecedented Ca2+ and La3+ coordination by a bis-(η3-uranyl(vi)-oxo) motif advances the understanding of uranium's aqueous chemistry. As determined from 17O NMR, Ca2+ and more distinctly La3+ cause strong O[double bond, length as m-dash]U[double bond, length as m-dash]O polarization, which opens up new ways for uranyl(vi)-oxygen activation and functionalization.
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Affiliation(s)
- Jerome Kretzschmar
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
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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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Miyamoto N, Ikeda Y, Tsukahara T. Multinuclear NMR Studies on Lewis Acid-Lewis Base Interactions between Bis(pentafluorophenyl)borinic Acid and Uranyl β-Diketonato Complexes in Toluene. Inorg Chem 2020; 59:11347-11356. [PMID: 32799480 DOI: 10.1021/acs.inorgchem.0c00979] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In order to examine the possibility of Lewis acid-Lewis base (LA-LB) interactions between the boron atom of B(C6F5)2OH and the oxo groups ("yl" oxygen atoms) of uranyl β-diketonato complexes, we have measured the 1H, 11B, 17O, 19F NMR and IR spectra of toluene solutions containing β-diketonato complexes [UO2(acac)2DMSO or UO2(dfh)2DMSO, where acac = 2,4-pentanedionate, dfh = 1,1,1,2,2,6,6,7,7,7-decafluoroheptane-3,5-dionate, and DMSO = dimethyl sulfoxide] and B(C6F5)2OH. 11B and 17O NMR spectra of solutions containing UO2(dfh)2DMSO and B(C6F5)2OH showed no change in their chemical shifts regardless of the [B(C6F5)2OH]/[UO2(dfh)2DMSO] ratio. This indicates that there were no apparent interactions between B(C6F5)2OH and UO2(dfh)2DMSO. On the other hand, in the corresponding NMR spectra of solutions containing UO2(acac)2DMSO and B(C6F5)2OH, new signals were observed at a higher field than signals observed in the solutions containing only B(C6F5)2OH or UO2(acac)2DMSO, and their intensity changed with the [B(C6F5)2OH]/[UO2(acac)2DMSO] ratio. These results reveal that a complex with LA-LB interaction (B···O═U) between the boron atom of B(C6F5)2OH and the "yl" oxygen atom of UO2(acac)2DMSO was formed. IR spectra also supported such complex formation; i.e., the asymmetric O═U═O stretching band of UO2(acac)2DMSO was observed to shift from 897 to 810 cm-1 with the addition of B(C6F5)2OH. Moreover, 19F NMR spectra indicated that 1:1 and 2:1 LA-LB complexes exist in equilibrium, UO{OB(C6F5)2OH}(acac)2DMSO + B(C6F5)2OH = U{OB(C6F5)2OH}2(acac)2DMSO. The thermodynamic parameters for this equilibrium were obtained as K = (2.5 ± 0.6) × 102 M-1 (at 25 °C), ΔH = -42.4 ± 5.2 kJ mol-1, and ΔS = -96.7 ± 19.4 J K-1 mol-1. In 1H NMR spectra, the signal due to -CH groups of UO2(acac)2DMSO disappeared, and three signals due to the corresponding -CH groups newly appeared with an increase in the [B(C6F5)2OH]/[UO2(acac)2DMSO] ratio. From these phenomena, it is proposed that 1:1 and 2:1 LA-LB complexes having interactions between the -CH groups of acac and the -OH group of coordinated B(C6F5)2OH are formed depending on the [B(C6F5)2OH]/[UO2(acac)2DMSO] ratio.
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Affiliation(s)
- Naomi Miyamoto
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1-N1-6 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Yasuhisa Ikeda
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1-N1-6 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Takehiko Tsukahara
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1-N1-6 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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14
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Niklas JE, Hunter KM, Gorden AEV. Bonding Interactions in Uranyl α-Diimine Complexes: A Spectroscopic and Electrochemical Study of the Impacts of Ligand Electronics and Extended Conjugation. Inorg Chem 2019; 58:15088-15100. [PMID: 31689099 DOI: 10.1021/acs.inorgchem.9b01695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Uranyl complexes of aryl-substituted α-diimine ligands gbha (UO2-1a-f) and phen-BIAN (UO2-2a-f) [gbha (1) = glyoxal bis(2-hydroxyanil); phen-BIAN (2) = N,N'-bis(iminophenol)acenaphthene; R = OMe (a), t-bu (b), H (c), Me (d), F (e), and naphthyl (f)] were designed, prepared, and characterized by X-ray diffraction, FT-IR, NMR, UV-vis, and electrochemical methods. These ligand frameworks contain a salen-type O-N-N-O binding pocket but are redox-noninnocent, leading to unusual metal complex behaviors. Here, we describe three solid-state structures of uranyl complexes UO2-1b, UO2-1c, and UO2-1f and observe manifestations of ligand noninnocence for the U(VI) complexes UO2-1b and UO2-1c. The impacts of accessible π-systems and ligand substitution on the axial uranium-oxo interactions were evaluated spectroscopically via the intraligand charge-transfer (ILCT) processes that dominate the absorption spectra of these complexes and through changes to the asymmetric (ν3) O═U═O stretching frequency. This, in combination with electrochemical data, reveals the effects of the inclusion of the conjugated acenaphthene backbone and the importance of ligand electronic structure on uranyl's bonding interactions.
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Affiliation(s)
- Julie E Niklas
- Department of Chemistry and Biochemistry , Auburn University , 179 Chemistry Building , Auburn , Alabama 36849 , United States
| | - Katherine M Hunter
- 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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15
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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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16
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Gomez GE, Ridenour JA, Byrne NM, Shevchenko AP, Cahill CL. Novel Heterometallic Uranyl-Transition Metal Materials: Structure, Topology, and Solid State Photoluminescence Properties. Inorg Chem 2019; 58:7243-7254. [DOI: 10.1021/acs.inorgchem.9b00255] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Germán E. Gomez
- Instituto de Investigaciones en Tecnología Química (INTEQUI), Area de Química General e Inorgánica “Dr. G. F. Puelles,” Facultad de Química, Bioquímica y Farmacia, Chacabuco y Pedernera, Universidad Nacional de San Luis, Almirante Brown, 1455, 5700 San Luis, Argentina
| | - J. August Ridenour
- Department of Chemistry, The George Washington University, Science and Engineering Hall, 800 22nd Street, NW, Washington, DC 20052, United States
| | - Nicole M. Byrne
- Department of Chemistry, The George Washington University, Science and Engineering Hall, 800 22nd Street, NW, Washington, DC 20052, United States
| | - Alexander P. Shevchenko
- Samara Center for Theoretical Materials Science, Samara University, 34, Moskovskoye shosse, Samara, 443086, Russia
| | - Christopher L. Cahill
- Department of Chemistry, The George Washington University, Science and Engineering Hall, 800 22nd Street, NW, Washington, DC 20052, United States
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17
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Arnold PL, Puig-Urrea L, Wells JAL, Yuan D, Cruickshank FL, Young RD. Applications of boroxide ligands in supporting small molecule activation by U(iii) and U(iv) complexes. Dalton Trans 2019; 48:4894-4905. [PMID: 30924481 DOI: 10.1039/c8dt05051a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The boroxide ligand [OBAr2]- (Ar = Mes, Trip) is shown to be able to support both UIII and UIV centres for the first time. The synthesis and structures of homoleptic and heteroleptic UIII and UIV complexes are reported. The UX3 complex with larger substituents, [U(OBTrip2)3]2, exhibits greater thermal stability compared to less encumbered [U(OBMes2)3]2 but reacts with a smaller range of the small molecules tested to date. Initial studies on their capacity to participate in small molecule chemistry show that dark purple [U(OBMes2)3]2 binds and/or reductively activates a variety of small molecules such as pyridine-oxide, triphenylphosphineoxide, sulfur, and dicyclohexylcarbodiimide. While [U(OBMes2)3]2 shows no reaction with CO or CO2, [U(OBTrip2)3]2 is oxidised by both, in the former case forming [U(OBTrip2)4], and in the latter case forming a small quantity of the structurally characterised μ-carbonate product [(μ-CO3){U(OBTrip2)3}2].
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Affiliation(s)
- Polly L Arnold
- EaStCHEM School of Chemistry, Joseph Black Building, The King's Buildings, The University of Edinburgh, Edinburgh, EH9 3FJ, UK
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18
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Maria L, Santos IC, Santos I. Uranium(iii) complexes supported by hydrobis(mercaptoimidazolyl)borates: synthesis and oxidation chemistry. Dalton Trans 2018; 47:10601-10612. [PMID: 29790539 DOI: 10.1039/c8dt01149d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The reaction of [UI3(thf)4] with the sodium or lithium salts of hydrobis(2-mercapto-1-methylimidazolyl)borate ligands ([H(R)B(timMe)2]-) in a 1 : 2 ratio, in tetrahydrofuran, gave the U(iii) complexes [UI{κ3-H,S,S'-H(R)B(timMe)2}2(thf)2] (R = H (1), Ph (2)) in good yields. Crystals of [UI{κ3-H,S,S'-H(Ph)B(timMe)2}2(thf)2] (2) were obtained by recrystallization from a tetrahydrofuran/acetonitrile solution, and the ion-separated uranium complex [U{κ3-H,S,S'-H(Ph)B(timMe)2}2(CH3CN)3][I] (3-I) was obtained by dissolution of 2 in acetonitrile followed by recrystallization. One-electron oxidation of 2 with AgBPh4 or I2 resulted in the formation of the cationic U(iv) complexes [U{κ3-H,S,S'-H(Ph)B(timMe)2}3][X] (X = BPh4 (6-BPh4), I (6-I)), due to a ligand redistribution process. These complexes are the first examples of homoleptic poly(azolyl)borate U(iv) complexes. Treatment of complex 2 with azobenzene led to the isolation of crystals of the U(iv) compound [UI{κ3-H(Ph)B(timMe)2}2(κ2-timMe)] (7). Treatment of 2 with pyridine-N oxide (pyNO) led to the formation of the uranyl complex [UO2{κ2-S,S'-H(Ph)B(timMe)2}2] (8) and of complex 6-I, while from the reaction of [U{κ3-H(Ph)B(timMe)2}2(thf)3][BPh4] (5) with pyNO, the oxo-bridged U(iv) complex [{U{κ3-H(Ph)B(timMe)2}2(pyNO)}2(μ-O)][BPh4]2 (9) was also obtained. In the U(iii) and U(iv) complexes, the bis(azolyl)borate ligands bind to the uranium center in a κ3-H,S,S' coordination mode, while in the U(vi) complex the ligands bind to the metal in a κ2-S,S' mode. The presence of UH-B interactions in the solid-state, for the nine-coordinate complexes 1, 2, 3, 6 and 7 and for the eight-coordinate complex 9, was supported by IR spectroscopy and/or X-ray diffraction analysis.
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Affiliation(s)
- Leonor Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
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19
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Carter KP, Surbella RG, Kalaj M, Cahill CL. Restricted Speciation and Supramolecular Assembly in the 5f Block. Chemistry 2018; 24:12747-12756. [DOI: 10.1002/chem.201801044] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 05/08/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Korey P. Carter
- Department of Chemistry The George Washington University 800 22nd Street NW Washington, DC 20052 USA
| | - Robert G. Surbella
- Department of Chemistry The George Washington University 800 22nd Street NW Washington, DC 20052 USA
- Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99354 USA
| | - Mark Kalaj
- Department of Chemistry The George Washington University 800 22nd Street NW Washington, DC 20052 USA
| | - Christopher L. Cahill
- Department of Chemistry The George Washington University 800 22nd Street NW Washington, DC 20052 USA
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20
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Vargas-Zúñiga GI, Sessler JL. Anion and Cation Complexes of Expanded Porphyrins. ADVANCES IN INORGANIC CHEMISTRY 2018. [DOI: 10.1016/bs.adioch.2017.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Kalaj M, Carter KP, Cahill CL. Isolating Equatorial and Oxo Based Influences on Uranyl Vibrational Spectroscopy in a Family of Hybrid Materials Featuring Halogen Bonding Interactions with Uranyl Oxo Atoms. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700788] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mark Kalaj
- Department of Chemistry The George Washington University 800 22nd Street, NW 20052 Washington D.C. USA
| | - Korey P. Carter
- Department of Chemistry The George Washington University 800 22nd Street, NW 20052 Washington D.C. USA
| | - Christopher L. Cahill
- Department of Chemistry The George Washington University 800 22nd Street, NW 20052 Washington D.C. USA
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22
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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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23
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Carter KP, Kalaj M, Surbella RG, Ducati LC, Autschbach J, Cahill CL. Engaging the Terminal: Promoting Halogen Bonding Interactions with Uranyl Oxo Atoms. Chemistry 2017; 23:15355-15369. [DOI: 10.1002/chem.201702744] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Korey P. Carter
- Department of Chemistry The George Washington University 800 22nd Street, NW Washington DC 20052 USA
| | - Mark Kalaj
- Department of Chemistry The George Washington University 800 22nd Street, NW Washington DC 20052 USA
| | - Robert G. Surbella
- Department of Chemistry The George Washington University 800 22nd Street, NW Washington DC 20052 USA
| | - Lucas C. Ducati
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo P.O. Box 26077 São Paulo SP 05513-970 Brazil
| | - Jochen Autschbach
- Department of Chemistry University at Buffalo State University of New York Buffalo NY 14260 USA
| | - Christopher L. Cahill
- Department of Chemistry The George Washington University 800 22nd Street, NW Washington DC 20052 USA
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24
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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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25
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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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26
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Pedrick EA, Assefa MK, Wakefield ME, Wu G, Hayton TW. Uranyl Coordination by the 14-Membered Macrocycle Dibenzotetramethyltetraaza[14]annulene. Inorg Chem 2017; 56:6638-6644. [DOI: 10.1021/acs.inorgchem.7b00700] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elizabeth A. Pedrick
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Mikiyas K. Assefa
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Megan E. Wakefield
- 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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27
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Thuéry P, Harrowfield J. Recent advances in structural studies of heterometallic uranyl-containing coordination polymers and polynuclear closed species. Dalton Trans 2017; 46:13660-13667. [DOI: 10.1039/c7dt03105j] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A survey is given of recent original structural results on heterometallic species incorporating uranyl ions, particularly with carboxylate ligands.
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28
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Kannan S, Kumar M, Sadhu B, Jaccob M, Sundararajan M. Unusual intramolecular CH⋯O hydrogen bonding interaction between a sterically bulky amide and uranyl oxygen. Dalton Trans 2017; 46:16939-16946. [DOI: 10.1039/c7dt02760e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unusual intramolecular CH⋯O hydrogen bonding interaction between a sterically bulky amide and uranyl oxygen is found to selectively extract uranyl.
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Affiliation(s)
| | - Mukesh Kumar
- Solid State Physics Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Biswajit Sadhu
- Radiation Safety and Systems Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | | | - Mahesh Sundararajan
- Theoretical Chemistry Section
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
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