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Xiong Z, Yang M, Chen X, Gong Y. Influence of Metal Coordination on the Gas-Phase Chemistry of the Positional Isomers of Fluorobenzoate Complexes. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:2181-2190. [PMID: 36251055 DOI: 10.1021/jasms.2c00236] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The fragmentation behaviors of the o-, m-, and p-fluorobenzoate complexes of La3+, Ce3+, Fe3+, Cu2+, and UO22+ were investigated by electrospray ionization mass spectrometry, and the corresponding reaction mechanisms were explored by density functional theory (DFT) calculations. Fluoride transfer product LaIIIFCl3-/CeIIIFCl3- and decarboxylation product LaIIICl3(C6H4F)-/CeIIICl3(C6H4F)- were observed when the carboxylate precursors LaIIICl3(C6H4FCO2)-/CeIIICl3(C6H4FCO2)- were subjected to collision-induced dissociation. The variation in product ratios, which is not obvious in the meta and para cases, qualitatively follows the increasing overall energy barrier and reaction endothermicity of the two-step CO2/C6H4 elimination mechanism, and this aligns with the increase in U-F distance in the ortho, meta, and para decarboxylation product isomers. In contrast, the mass spectra of FeIIICl3(C6H4FCO2)-/CuIICl2(C6H4FCO2)- are dominated by the reduction product FeCl3-/CuCl2- regardless of the fluorobenzoate isomer. DFT/B3LYP calculations show that the two-step CO2/C6H4F elimination pathways are comparable in energy for all three positional isomers. It is energetically more favorable to give the reduction product than the fluoride transfer product, which is opposite to the lanthanum cases. Although the decarboxylation product was observed for all three UVIO2Cl2(C6H4FCO2)- isomers, the ortho isomer behaves more similarly to LaIIICl3(C6H4FCO2)-/CeIIICl3(C6H4FCO2)- as evidenced by the formation of UVIO2FCl2-, and the appearance of UVO2Cl2- in the cases of the meta and para isomers indicates the similarity with FeIIICl3(C6H4FCO2)-/CuIICl2(C6H4FCO2)-. The shorter U-F distance in UVIO2Cl2(o-C6H4F)- causes the decrease in the fluoride transfer barrier and thus makes this process more favorable over o-C6H4F radical loss to give UVO2Cl2-.
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Affiliation(s)
- Zhixin Xiong
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meixian Yang
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuting Chen
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Yu Gong
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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2
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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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3
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Weng QY, Zhao YL, Li JM, Ouyang M. Construction of Two Stable Co(II)-Based Hydrogen-Bonded Organic Frameworks as a Luminescent Probe for Recognition of Fe 3+ and Cr 2O 72- in H 2O. Molecules 2021; 26:5955. [PMID: 34641498 PMCID: PMC8513017 DOI: 10.3390/molecules26195955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/21/2021] [Accepted: 09/29/2021] [Indexed: 11/16/2022] Open
Abstract
A pair of cobalt(II)-based hydrogen-bonded organic frameworks (HOFs), [Co(pca)2(bmimb)]n (1) and [Co2(pca)4(bimb)2] (2), where Hpca = p-chlorobenzoic acid, bmimb = 1,3-bis((2-methylimidazol-1-yl)methyl)benzene, and bimb = 1,4-bis(imidazol-1-ylmethyl)benzene were hydrothermally synthesized and characterized through infrared spectroscopy (IR), elemental and thermal analysis (EA), power X-ray diffraction (PXRD), and single-crystal X-ray diffraction (SCXRD) analyses. X-ray diffraction structural analysis revealed that 1 has a one-dimensional (1D) infinite chain network through the deprotonated pca- monodentate chelation and with a μ2-bmimb bridge Co(II) atom, and 2 is a binuclear Co(II) complex construction with a pair of symmetry-related pca- and bimb ligands. For both 1 and 2, each cobalt atom has four coordinated twisted tetrahedral configurations with a N2O2 donor set. Then, 1 and 2 are further extended into three-dimensional (3D) or two-dimensional (2D) hydrogen-bonded organic frameworks through C-H···Cl interactions. Topologically, HOFs 1 and 2 can be simplified as a 4-connected qtz topology with a Schläfli symbol {64·82} and a 4-connected sql topology with a Schläfli symbol {44·62}, respectively. The fluorescent sensing application of 1 was investigated; 1 exhibits high sensitivity recognition for Fe3+ (Ksv: 10970 M-1 and detection limit: 19 μM) and Cr2O72- (Ksv: 12960 M-1 and detection limit: 20 μM). This work provides a feasible detection platform of HOFs for highly sensitive discrimination of Fe3+ and Cr2O72- in aqueous media.
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Affiliation(s)
- Qi-Ying Weng
- Guangxi Key Laboratory of Green Chemical Materials and Safety Technology, College of Petroleum and Chemical Engineering, Beibu Gulf University, Qinzhou 535011, China; (Q.-Y.W.); (Y.-L.Z.)
| | - Ya-Li Zhao
- Guangxi Key Laboratory of Green Chemical Materials and Safety Technology, College of Petroleum and Chemical Engineering, Beibu Gulf University, Qinzhou 535011, China; (Q.-Y.W.); (Y.-L.Z.)
- College of International Studies, Beibu Gulf University, Qinzhou 535011, China
| | - Jia-Ming Li
- Guangxi Key Laboratory of Green Chemical Materials and Safety Technology, College of Petroleum and Chemical Engineering, Beibu Gulf University, Qinzhou 535011, China; (Q.-Y.W.); (Y.-L.Z.)
| | - Miao Ouyang
- School of Chemical and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China
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4
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Byrne NM, Schofield MH, Nicholas AD, Cahill CL. Bimetallic uranyl/cobalt(II) isothiocyanates: structure, property and spectroscopic analysis of homo- and heterometallic phases. Dalton Trans 2021; 50:9158-9172. [PMID: 34115090 DOI: 10.1039/d1dt01464a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis and characterization of a family of UO22+/Co2+ isothiocyanate materials containing [UO2(NCS)5]3- and/or [Co(NCS)4]2- building units charged balanced by tetramethylammonium cations and assembled via SS or SOyl non-covalent interactions (NCIs), namely (C4H12N)3[UO2(NCS)5], (C4H12N)2[Co(NCS)4], and (C4H12N)5[Co(NCS)4][UO2(NCS)5]. The homometallic uranyl phase preferentially assembles via SS interactions, whereas in the heterometallic phase SOyl interactions are predominant. The variation in assembly mode is explored using electrostatic surfaces potentials, revealing that the pendant -NCS ligands of the [Co(NCS)4]2- anion is capable of outcompeting those of the [UO2(NCS)5]3- anion. Notably, the heterometallic phase displays atypical blue shifting of the uranyl symmetric stretch in the Raman spectra, which is in contrast to many other compounds featuring non-covalent interactions at uranyl oxygen atoms. A combined experimental and computational (density functional theory and natural bond orbital analyses) approach revealed that coupling of the uranyl symmetric stretch with isothiocyanate modes of equatorial -NCS ligands was responsible for the atypical blue shift in the heterometallic phase.
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Affiliation(s)
- Nicole M Byrne
- Department of Chemistry, The George Washington University, 800 22nd St NW, Suite 4000, Washington, D.C. 20052, USA.
| | - Mark H Schofield
- Department of Chemistry, The George Washington University, 800 22nd St NW, Suite 4000, Washington, D.C. 20052, USA.
| | - Aaron D Nicholas
- Department of Chemistry, The George Washington University, 800 22nd St NW, Suite 4000, Washington, D.C. 20052, USA.
| | - Christopher L Cahill
- Department of Chemistry, The George Washington University, 800 22nd St NW, Suite 4000, Washington, D.C. 20052, USA.
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Carter KP, Kalaj M, McNeil S, Kerridge A, Schofield MH, Ridenour JA, Cahill CL. Structural, spectroscopic, and computational evaluations of cation–cation and halogen bonding interactions in heterometallic uranyl hybrid materials. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01319f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A route for systematically accessing the oxo atoms of the linear uranyl (UO22+) cation via cation–cation and halogen bonding interactions is detailed, and interaction strengths are probed via structural, vibrational, and computational means.
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Affiliation(s)
- Korey P. Carter
- Department of Chemistry
- The George Washington University
- Washington
- USA
- Chemical Sciences Division
| | - Mark Kalaj
- Department of Chemistry
- The George Washington University
- Washington
- USA
- Department of Chemistry and Biochemistry
| | - Sapphire McNeil
- Department of Chemistry
- Lancaster University
- Bailrigg
- Lancaster LA1 4YB
- UK
| | - Andrew Kerridge
- Department of Chemistry
- Lancaster University
- Bailrigg
- Lancaster LA1 4YB
- UK
| | - Mark H. Schofield
- Department of Chemistry
- The George Washington University
- Washington
- USA
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Pyrch MM, Williams JM, Kasperski MW, Applegate LC, Forbes TZ. Synthesis and spectroscopic characterization of actinyl(VI) tetrahalide coordination compounds containing 2, 2′-bipyridine. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Consideration of the extensive family of known uranyl ion complexes of polycarboxylate ligands shows that there are quite numerous examples of crystalline solids containing capsular, closed oligomeric species with the potential for use as selective heterogeneous photo-oxidation catalysts. None of them have yet been assessed for this purpose, and some have obvious deficiencies, although related framework species have been shown to have the necessary luminescence, porosity and, to some degree, selectivity. Aspects of ligand design and complex composition necessary for the synthesis of uranyl ion cages with appropriate luminescence and chemical properties for use in selective photo-oxidation catalysis have been analysed in relation to the characteristics of known capsules.
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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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9
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Serezhkin VN, Grigoriev MS, Savchenkov AV, Budantseva NA, Fedoseev AM, Serezhkina LB. Peculiarities of the Supramolecular Assembly of Tetraethylammonium and 3-Bromopropionate Ions in Uranyl, Neptunyl, and Plutonyl Coordination Compounds. Inorg Chem 2019; 58:14577-14585. [PMID: 31622086 DOI: 10.1021/acs.inorgchem.9b02235] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis and X-ray diffraction studies of {N(C2H5)4}[AnO2(C2H4BrCOO)3] [An = U (I), Np (II), or Pu (III)] and C2H4BrCOOH (IV), where C2H4BrCOO- is an anion of the 3-bromopropionic acid, are reported. The isostructural coordination compounds I-III contain mononuclear anionic complexes [AnO2(C2H4BrCOO)3]- belonging to the crystal chemical group AB013 (A = AnO22+; B01 = C2H4BrCOO-). In the crystal structure of IV, the C2H4BrCOOH molecules are hydrogen bonded into centrosymmetric dimers R22(8). Using the method of molecular Voronoi-Dirichlet (VD) polyhedra, the features of intermolecular interactions in crystals of I-IV are discussed in support of the results of IR and UV spectroscopy experiments. Actinide contraction in I-III manifests itself in a regular reduction of the average length of the axial and equatorial bonds in hexagonal bipyramids AnO8, in an increase in νas(AnO22+) wavenumbers, and in a simultaneous decrease in the volume and sphericity degree of VD polyhedra of An atoms in the U-Np-Pu series. The title compounds represent an interesting architecture, where 3-bromopropionate ions penetrate through the square 44 net of tetraethylammonium ions and thus bind adjacent nets via the "locking effect".
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Affiliation(s)
- Viktor N Serezhkin
- Samara National Research University , Moskovskoye Highway 34 , Oblast, Samara 443086 , Russia
| | - Mikhail S Grigoriev
- Frumkin Institute of Physical Chemistry and Electrochemistry , Russian Academy of Sciences , Moscow 119071 , Russia
| | - Anton V Savchenkov
- Samara National Research University , Moskovskoye Highway 34 , Oblast, Samara 443086 , Russia
| | - Nina A Budantseva
- Frumkin Institute of Physical Chemistry and Electrochemistry , Russian Academy of Sciences , Moscow 119071 , Russia
| | - Aleksandr M Fedoseev
- Frumkin Institute of Physical Chemistry and Electrochemistry , Russian Academy of Sciences , Moscow 119071 , Russia
| | - Larisa B Serezhkina
- Samara National Research University , Moskovskoye Highway 34 , Oblast, Samara 443086 , Russia
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Halogen Bonds in 2,5-Dihalopyridine-Copper(I) Halide Coordination Polymers. MATERIALS 2019; 12:ma12203305. [PMID: 31614477 PMCID: PMC6829255 DOI: 10.3390/ma12203305] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/29/2019] [Accepted: 10/03/2019] [Indexed: 01/07/2023]
Abstract
Two series of 2,5-dihalopyridine-Cu(I)A (A = I, Br) complexes based on 2-X-5-iodopyridine and 2-X-5-bromopyridine (X = F, Cl, Br and I) are characterized by using single-crystal X-ray diffraction analysis to examine the nature of C2-X2···A-Cu and C5-X5···A-Cu halogen bonds. The reaction of the 2,5-dihalopyridines and Cu(I) salts allows the synthesis of eight 1-D coordination polymers and a discrete structure. The resulting Cu(I)-complexes are linked by C-X···A-Cu halogen bonds forming 3-D supramolecular networks. The C-X···A-Cu halogen bonds formed between halopyridine ligands and copper(I)-bound halide ions are stronger than C-X···X'-C interactions between two 2,5-dihalopyridine ligands. The C5-I5···I-Cu and C5-Br5···Br-Cu halogens bonds are shorter for C2-fluorine than C2-chlorine due to the greater electron-withdrawing power of fluorine. In 2,5-diiodopyridine-Cu(I)Br complex, the shorter C2-I2···Br-Cu [3.473(5) Å] distances are due to the combined polarization of C2-iodine by C2-I2···Cu interactions and para-electronic effects offered by the C5-iodine, whilst the long halogen bond contacts for C5-I5···Br-Cu [3.537(5) Å] are indicative that C2-iodine has a less para-electronic influence on the C5-iodine. In 2-fluoro-5-X-pyridine-Cu(I) complexes, the C2-fluorine is halogen bond passive, while the other C2-halogens in 2,5-dihalopyridine-Cu(I), including C2-chlorine, participate in halogen bonding interactions.
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11
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Kalaj M, Momeni MR, Bentz KC, Barcus KS, Palomba JM, Paesani F, Cohen SM. Halogen bonding in UiO-66 frameworks promotes superior chemical warfare agent simulant degradation. Chem Commun (Camb) 2019; 55:3481-3484. [PMID: 30829360 DOI: 10.1039/c9cc00642g] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a series of halogenated UiO-66 derivatives was synthesized and analyzed for the breakdown of the chemical warfare agent simulant dimethyl-4-nitrophenyl phosphate (DMNP) to analyze ligand effects. UiO-66-I degrades DMNP at a rate four times faster than the most active previously reported MOFs. MOF defects were quantified and ruled out as a cause for increased activity. Theoretical calculations suggest the enhanced activity of UiO-66-I originates from halogen bonding of the iodine atom to the phosphoester linkage allowing for more rapid hydrolysis of the P-O bond.
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Affiliation(s)
- Mark Kalaj
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92023-0358, USA.
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12
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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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Nuzzo S, Twamley B, Platts JA, Baker RJ. Pseudohalide Tectons within the Coordination Sphere of the Uranyl Ion: Experimental and Theoretical Study of C-H···O, C-H···S, and Chalcogenide Noncovalent Interactions. Inorg Chem 2018. [PMID: 29542918 DOI: 10.1021/acs.inorgchem.7b02967] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A series of uranyl thiocyanate and selenocyanate of the type [R4N]3[UO2(NCS)5] (R4 = nBu4, Me3Bz, Et3Bz), [Ph4P][UO2(NCS)3(NO3)] and [R4N]3[UO2(NCSe)5] (R4 = Me4, nPr4, Et3Bz) have been prepared and structurally characterized. The resulting noncovalent interactions have been examined and compared to other examples in the literature. The nature of these interactions is determined by the cation so that when the alkyl groups are small, chalcogenide···chalcogenide interactions are present, but this "switches off" when R = nPr and charge assisted U═O···H-C and S(e)···H-C hydrogen bonding remain the dominant interaction. Increasing the size of the chain to nBu results in only S···H-C interactions. The spectroscopic implications of these chalcogenide interactions have been explored in the vibrational and photophysical properties of the series [R4N]3[UO2(NCS)5] (R4 = Me4, Et4, nPr4, nBu4, Me3Bz, Et3Bz), [R4N]3[UO2(NCSe)5] (R4 = Me4, nPr4, Et3Bz) and [Et4N]4[UO2(NCSe)5][NCSe]. The data suggest that U═O···H-C interactions are weak and do not perturb the uranyl moiety. While the chalcogenide interactions do not influence the photophysical properties, a coupling of the U═O and δ(NCS) or δ(NCSe) vibrational modes is observed in the 77 K solid state emission spectra. A theoretical examination of representative examples of Se···Se, C-H···Se, and C-H···O═U by molecular electrostatic potentials and NBO and AIM methodologies gives a deeper understanding of these weak interactions. C-H···Se are individually weak but C-H···O═U interactions are even weaker, supporting the idea that the -yl oxo's are weak Lewis bases. An Atoms in Molecules study suggests that the chalcogenide interaction is similar to lone pair···π or fluorine···fluorine interactions. An oxidation of the NCS ligands to form [(UO2)(SO4)2(H2O)4]·3H2O was also noted.
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Affiliation(s)
- Stefano Nuzzo
- School of Chemistry , University of Dublin, Trinity College , Dublin 2 , Ireland
| | - Brendan Twamley
- School of Chemistry , University of Dublin, Trinity College , Dublin 2 , Ireland
| | - James A Platts
- School of Chemistry, Main Building , Cardiff University , Park Place , Cardiff CF10 3AT , U.K
| | - Robert J Baker
- School of Chemistry , University of Dublin, Trinity College , Dublin 2 , Ireland
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14
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Carter KP, Kalaj M, Kerridge A, Ridenour JA, Cahill CL. How to Bend the Uranyl Cation via Crystal Engineering. Inorg Chem 2018; 57:2714-2723. [DOI: 10.1021/acs.inorgchem.7b03080] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Korey P. Carter
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, D.C. 20052, United States
| | - Mark Kalaj
- Department of Chemistry, The George Washington University, 800 22nd Street, NW, Washington, D.C. 20052, United States
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University, Bailrigg, Lancaster LA1 4YB, United Kingdom
| | - J. August Ridenour
- 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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15
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Carter KP, Kalaj M, Kerridge A, Cahill CL. Probing hydrogen and halogen-oxo interactions in uranyl coordination polymers: a combined crystallographic and computational study. CrystEngComm 2018. [DOI: 10.1039/c8ce00682b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Four uranyl compounds containing either benzoic acid (1), m-chlorobenzoic acid (2), m-bromobenzoic acid (3), or m-iodobenzoic acid (4) are described, and the latter two compounds are used to probe non-covalent interaction strengths via structural, vibrational, and computational means.
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Affiliation(s)
- Korey P. Carter
- Department of Chemistry
- The George Washington University
- Washington, D.C. 20052
- USA
| | - Mark Kalaj
- Department of Chemistry
- The George Washington University
- Washington, D.C. 20052
- USA
| | - Andrew Kerridge
- Department of Chemistry
- Lancaster University
- Lancaster LA1 4YB
- UK
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