1
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White MV, Claveau EE, Miliordos E, Vogiatzis KD. Electronic Structure and Ligand Effects on the Activation and Cleavage of N 2 on a Molybdenum Center. J Phys Chem A 2024; 128:2038-2048. [PMID: 38447072 DOI: 10.1021/acs.jpca.3c07801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Dinitrogen fixation under ambient conditions remains a challenge in the field of catalytic chemistry due to the inertness of N2. Nitrogenases and heterogeneous solid catalysts have displayed remarkable performance in the catalytic conversion of dinitrogen to ammonia. By introduction of molybdenum centers in molecular complexes, one of the most azophilic metals of the transitional metal series, moderate ammonia yields have been attained. Here, we present a combined multiconfigurational/density functional theory study that addresses how ligand fields of different strengths affect the binding and activation of dinitrogen on molybdenum atoms. First, we explored with MRCI computations the diatomic Mo-N and triatomic Mo-N2 molecular systems. Then, we performed a systematic examination on the stabilization effects introduced by external NH3 ligands, before we explore model neutral and charged complexes with different types of ligands (H2O, NH3, and PH3) and their consequences on the N2 binding and activation.
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Affiliation(s)
- Maria V White
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Emily E Claveau
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849-5312, United States
| | - Evangelos Miliordos
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849-5312, United States
| | - Konstantinos D Vogiatzis
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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2
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Pathirage PDVS, Phillips JT, Vogiatzis KD. Exploration of the Two-Electron Excitation Space with Data-Driven Coupled Cluster. J Phys Chem A 2024. [PMID: 38422511 DOI: 10.1021/acs.jpca.3c06600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Computational cost limits the applicability of post-Hartree-Fock methods such as coupled-cluster on larger molecular systems. The data-driven coupled-cluster (DDCC) method applies machine learning to predict the coupled-cluster two-electron amplitudes (t2) using data from second-order perturbation theory (MP2). One major limitation of the DDCC models is the size of training sets that increases exponentially with the system size. Effective sampling of the amplitude space can resolve this issue. Five different amplitude selection techniques that reduce the amount of data used for training were evaluated, an approach that also prevents model overfitting and increases the portability of data-driven coupled-cluster singles and doubles to more complex molecules or larger basis sets. In combination with a localized orbital formalism to predict the CCSD t2 amplitudes, we have achieved a 10-fold error reduction for energy calculations.
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Affiliation(s)
- P D Varuna S Pathirage
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Justin T Phillips
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Konstantinos D Vogiatzis
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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3
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Lastowski RJ, Yarranton JT, Zhu L, Vogiatzis KD, Girolami GS. Three-Center M-H-B Bonds Are Strong Field Interactions. Synthesis and Characterization of M(CH 2NMe 2BH 3) 3 Complexes of Titanium, Chromium, and Cobalt. J Am Chem Soc 2023; 145:23585-23599. [PMID: 37851538 DOI: 10.1021/jacs.3c07336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
We describe new compounds of stoichiometry M(CH2NMe2BH3)3 (M = Ti, Cr, and Co), each of which contains three chelating boranatodimethylaminomethyl (BDAM) ligands. In all three compounds, the BDAM anion, which is isoelectronic and isostructural with the neopentyl group, is bound to the metal center at one end by a metal-carbon σ bond and at the other by one three-center M-H-B interaction. The crystal structures show that the d1 titanium(III) compound is trigonal prismatic (or eight-coordinate, if two longer-ranged M···H interactions with the BH3 groups are included), whereas the d3 chromium(III) compound and the d6 cobalt(III) compounds are both fac-octahedral. The Cr and Co compounds exhibit two rapid dynamic processes in solution: exchange between the Δ and Λ enantiomers and exchange of the terminal and bridging hydrogen atoms on boron. For the Co complex, the barrier for Δ/Λ exchange (ΔG⧧298 = 10.1 kcal mol-1) is significantly smaller than those seen in other octahedral cobalt(III) compounds; DFT calculations suggest that Bailar twist and dissociative pathways for Δ/Λ exchange are both possible mechanisms. The UV-vis absorption spectra of the cobalt(III) and chromium(III) species show that the ligand field splittings Δo caused by the M-H-B interactions are unexpectedly large, thus placing them high on the spectrochemical series (near ammonia and alkyl groups); their nephelauxetic effect is also large. The DFT calculations suggest that these properties of M-H-B interactions are in part a consequence of their three-center nature, which delocalizes electron density away from the metal center and reduces electron-electron repulsions.
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Affiliation(s)
- R Joseph Lastowski
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jonathan T Yarranton
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Lingyang Zhu
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | | | - Gregory S Girolami
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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4
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Jones GM, Li RR, DePrince AE, Vogiatzis KD. Data-Driven Refinement of Electronic Energies from Two-Electron Reduced-Density-Matrix Theory. J Phys Chem Lett 2023:6377-6385. [PMID: 37418691 DOI: 10.1021/acs.jpclett.3c01382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2023]
Abstract
The exponential computational cost of describing strongly correlated electrons can be mitigated by adopting a reduced-density matrix (RDM)-based description of the electronic structure. While variational two-electron RDM (v2RDM) methods can enable large-scale calculations on such systems, the quality of the solution is limited by the fact that only a subset of known necessary N-representability constraints can be applied to the 2RDM in practical calculations. Here, we demonstrate that violations of partial three-particle (T1 and T2) N-representability conditions, which can be evaluated with knowledge of only the 2RDM, can serve as physics-based features in a machine-learning (ML) protocol for improving energies from v2RDM calculations that consider only two-particle (PQG) conditions. Proof-of-principle calculations demonstrate that the model yields substantially improved energies relative to reference values from configuration-interaction-based calculations.
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Affiliation(s)
- Grier M Jones
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Run R Li
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - A Eugene DePrince
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
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5
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Laub JA, Vogiatzis KD. Theoretical Investigation of Actinide Ligation in Aqueous and Organic Phase for Nuclear Waste Treatment. J Phys Chem A 2023. [PMID: 37352367 DOI: 10.1021/acs.jpca.2c08828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2023]
Abstract
The generation of radioactive waste has a prominent negative impact on the use of nuclear energy due to potential health concerns and cost of waste storage. This potential impact continues to rise as the quantity of waste increases due to the increasing growth in energy demand. One of the leading contributions to the radioactivity of this waste is due to the presence of actinides. The removal of these actinides by ligand-based solvent extraction methodologies provides an invaluable process necessary for the promotion of nuclear energy. By evaluating different ligands that are currently applied for actinide solvent extractions, more effective ligands could be proposed and synthesized for the successful separation of actinides from nuclear waste. Here, density functional theory (DFT) calculations for a variety of ligands and actinides are reported to explain the extraction process. Different solvation and ligation effects were evaluated for the computation of stability constants. The ratio of water and nitrate ligands in the coordination environment of actinides (Ac(III), Th(IV), Am(III), and Cm(III)) was first examined. Results from this step provided reliable initial conditions for the extraction of these actinides in both the aqueous (343HOPO) and the organic phase (BTBP). We also report a DFT benchmarking study as well as a modified BTBP ligand performance evaluation.
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Affiliation(s)
- Jeffrey A Laub
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Konstantinos D Vogiatzis
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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6
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Kirkland JK, Johnson SK, Vogiatzis KD. Computational investigation of functionalized carbenes on dinitrogen activation. J Comput Chem 2023; 44:832-842. [PMID: 36480003 DOI: 10.1002/jcc.27046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 11/01/2022] [Accepted: 11/14/2022] [Indexed: 12/13/2022]
Abstract
Activation of the dinitrogen triple bond is a crucial step in the overall fixation of atmospheric nitrogen into usable forms for industrial and biological applications. Current synthetic catalysts incorporate metal ions to facilitate the activation and cleavage of dinitrogen. The high price of metal-based catalysts and the challenge of catalyst recovery during industrial catalytic processes has led to increasing interest in metal-free catalysts. One step toward metal-free catalysis is the use of frustrated Lewis pairs (FLPs). In this study, we have examined 18 functionalized carbenes as FLPs to elucidate the influence of steric and electronic effects on the activation of dinitrogen. To test the effects of functionalization on dinitrogen activation, we have performed density functional theory (DFT), multireference, non and extended transition state-natural orbital for chemical valence (ETS-NOCV) calculations. Our results suggest that functional groups which introduce strong electron-withdrawing effects and/or engage in extended π/π* systems lead to the lowering of the dissociation energy of the dinitrogen bond, which further contributes to greater nitrogen activation. We conjecture that these effects are due to enhanced back-bonding capability of the p orbital of the carbene carbon atoms to the adjacent nitrogen atoms (increasing Lewis basicity of the carbene carbon atom) and enhanced stability of dissociated products. Our concluding remarks include opportunities to extend this activation study to explore the entire catalytic cycle with promising functionalized carbenes for experimental evaluation.
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Affiliation(s)
- Justin K Kirkland
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee, USA
| | - Sophia K Johnson
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee, USA.,Department of Chemistry, University of Texas at Austin, Austin, Texas, USA
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7
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Williams CK, McCarver GA, Chaturvedi A, Sinha S, Ang M, Vogiatzis KD, Jiang J“J. Electrocatalytic Hydrogen Evolution Using A Molecular Antimony Complex under Aqueous Conditions: An Experimental and Computational Study on Main‐Group Element Catalysis. Chemistry 2022; 28:e202201323. [DOI: 10.1002/chem.202201323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Caroline K. Williams
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221 USA
| | - Gavin A. McCarver
- Department of Chemistry University of Tennessee Knoxville Tennessee 37996-1600 USA
| | - Ashwin Chaturvedi
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221 USA
| | - Soumalya Sinha
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221 USA
| | - Marcus Ang
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221 USA
| | | | - Jianbing “Jimmy” Jiang
- Department of Chemistry University of Cincinnati P.O. Box 210172 Cincinnati Ohio 45221 USA
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8
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Chaturvedi A, McCarver GA, Sinha S, Hix EG, Vogiatzis KD, Jiang J. A PEGylated Tin Porphyrin Complex for Electrocatalytic Proton Reduction: Mechanistic Insights into Main‐Group‐Element Catalysis. Angew Chem Int Ed Engl 2022; 61:e202206325. [DOI: 10.1002/anie.202206325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Ashwin Chaturvedi
- Department of Chemistry University of Cincinnati Cincinnati OH 45221 USA
| | - Gavin A. McCarver
- Department of Chemistry University of Tennessee Knoxville TN 37996-1600 USA
| | - Soumalya Sinha
- Department of Chemistry University of Cincinnati Cincinnati OH 45221 USA
| | - Elijah G. Hix
- Department of Chemistry University of Tennessee Knoxville TN 37996-1600 USA
| | | | - Jianbing Jiang
- Department of Chemistry University of Cincinnati Cincinnati OH 45221 USA
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9
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Chaturvedi A, McCarver GA, Sinha S, Hix EG, Vogiatzis KD, Jiang JJ. A PEGylated Tin‐Porphyrin Complex for Electrocatalytic Proton Reduction: Mechanistic Insights into Main‐Group Element Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ashwin Chaturvedi
- University of Cincinnati Chemistry 312 College Dr. 45221 Cincinnati UNITED STATES
| | - Gavin A McCarver
- UT Knoxville: The University of Tennessee Knoxville Chemistry UNITED STATES
| | | | - Elijah G Hix
- UT Knoxville: The University of Tennessee Knoxville Chemistry UNITED STATES
| | - Konstantinos D Vogiatzis
- UT Knoxville: The University of Tennessee Knoxville Chemistry Buehler Hall1420 Circle Dr. 37996 Knoxville UNITED STATES
| | - Jianbing Jimmy Jiang
- University of Cincinnati Chemistry 312 College Dr. 45221 Cincinnati UNITED STATES
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10
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Kennedy BJ, Lato AM, Fisch AR, Burke SJ, Kirkland JK, Prevatte CW, Dunlap LE, Smith RT, Vogiatzis KD, Collier JJ, Campagna SR. Potent Anti-Inflammatory, Arylpyrazole-Based Glucocorticoid Receptor Agonists That Do Not Impair Insulin Secretion. ACS Med Chem Lett 2021; 12:1568-1577. [PMID: 34676039 DOI: 10.1021/acsmedchemlett.1c00379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Indexed: 11/28/2022] Open
Abstract
Glucocorticoids (GCs) are widely used in medicine for their role in the treatment of autoimmune-mediated conditions, certain cancers, and organ transplantation. The transcriptional activities GCs elicit include transrepression, postulated to be responsible for the anti-inflammatory activity, and transactivation, proposed to underlie the undesirable side effects associated with long-term use. A GC analogue that could elicit only transrepression and beneficial transactivation properties would be of great medicinal value and is highly sought after. In this study, a series of 1-(4-substituted phenyl)pyrazole-based GC analogues were synthesized, biologically screened, and evaluated for SARs leading to the desired activity. Activity observed in compounds bearing an electron deficient arylpyrazole moiety showed promise toward a dissociated steroid, displaying transrepression while having limited transactivation activity. In addition, compounds 11aa and 11ab were found to have anti-inflammatory efficacy comparable to that of dexamethasone at 10 nM, with minimal transactivation activity and no reduction of insulin secretion in cultured rat 832/13 beta cells.
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Affiliation(s)
- Brandon J. Kennedy
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Ashley M. Lato
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Alexander R. Fisch
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Susan J. Burke
- Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808, United States
| | - Justin K. Kirkland
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Carson W. Prevatte
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Lee E. Dunlap
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Russell T. Smith
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | | | - J. Jason Collier
- Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808, United States
| | - Shawn R. Campagna
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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11
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Abstract
The nature of donor-acceptor interactions is important for the understanding of dative bonding and can provide vital insights into many chemical processes. Here, we have performed a computational study to elucidate substantial differences between different types of dative interactions. For this purpose, a data set of 20 molecular complexes stabilized by dative bonds was developed (DAT20). A benchmark study that considers many popular density functionals with respect to accurate quantum chemical interaction energies and geometries revealed two different trends between the complexes of DAT20. This behavior was further explored by means of frontier molecular orbitals, extended-transition-state natural orbitals for chemical valence (ETS-NOCV), and natural energy decomposition analysis (NEDA). These methods revealed the extent of the forward and backdonation between the donor and acceptor molecules and how they influence the total interaction energies and molecular geometries. A new classification of dative bonds is suggested.
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Affiliation(s)
- Brett A Smith
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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12
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White MV, Kirkland JK, Vogiatzis KD. Redox states of dinitrogen coordinated to a molybdenum atom. J Chem Phys 2021; 154:224308. [PMID: 34241210 DOI: 10.1063/5.0050596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Chemical structures bearing a molybdenum atom have been suggested for the catalytic reduction of N2 at ambient conditions. Previous computational studies on gas-phase MoN and MoN2 species have focused only on neutral structures. Here, an ab initio electronic structure study on the redox states of small clusters composed of nitrogen and molybdenum is presented. The complete-active space self-consistent field method and its extension via second-order perturbative complement have been applied on [MoN]n and [MoN2]n species (n = 0, 1±, 2±). Three different coordination modes (end-on, side-on, and linear NMoN) have been considered for the triatomic [MoN2]n. Our results demonstrate that the reduced states of such systems lead to a greater degree of N2 activation, which can be the starting point of different reaction channels.
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Affiliation(s)
- Maria V White
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, USA
| | - Justin K Kirkland
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, USA
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13
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Liu S, Smith BA, Kirkland JK, Vogiatzis KD, Girolami GS. Nature of the Short Rh-Li Contact between Lithium and the Rhodium ω-Alkenyl Complex [Rh(CH 2CMe 2CH 2CH═CH 2) 2] . Inorg Chem 2021; 60:8790-8801. [PMID: 34097392 DOI: 10.1021/acs.inorgchem.1c00737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe the preparation of the cis-bis(η1,η2-2,2-dimethylpent-4-en-1-yl)rhodate(I) anion, cis-[Rh(CH2CMe2CH2CH═CH2)2]-, and the interaction of this species with Li+ both in solution and in the solid state. For the lithium(diethyl ether) salt [Li(Et2O)][Rh(CH2CMe2CH2CH═CH2)2], VT-NMR and 1H{7Li} NOE NMR studies in toluene-d8 show that the Li+ cation is in close proximity to the dz2 orbital of rhodium. In the solid-state structure of the lithium(12-crown-4) salt [Li(12-crown-4)2][Li{Rh(CH2CMe2CH2CH═CH2)2}2], one lithium atom is surrounded by two [Rh(CH2CMe2CH2CH═CH2)2]- anions, and in this assembly there are two unusually short Rh-Li distances of 2.48 Å. DFT calculations, natural energy decomposition, and ETS-NOCV analysis suggest that there is a weak dative interaction between the 4dz2 orbitals on the Rh centers and the 2pz orbital of the Li+ cation. The charge-transfer term between Rh and Li+ contributes only about the 1/5 of the total interaction energy, however, and the principal driving force for the proximity of Rh and Li in compounds 1 and 2 is that Li+ is electrostatically attracted to negative charges on the dialkylrhodiate anions.
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Affiliation(s)
- Sumeng Liu
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Brett A Smith
- Department of Chemistry, University of Tennessee, 1416 Circle Drive, Knoxville, Tennessee 37996, United States
| | - Justin K Kirkland
- Department of Chemistry, University of Tennessee, 1416 Circle Drive, Knoxville, Tennessee 37996, United States
| | - Konstantinos D Vogiatzis
- Department of Chemistry, University of Tennessee, 1416 Circle Drive, Knoxville, Tennessee 37996, United States
| | - Gregory S Girolami
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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14
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15
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Williams CK, McCarver GA, Lashgari A, Vogiatzis KD, Jiang JJ. Electrocatalytic Dechlorination of Dichloromethane in Water Using a Heterogenized Molecular Copper Complex. Inorg Chem 2021; 60:4915-4923. [PMID: 33733752 DOI: 10.1021/acs.inorgchem.0c03833] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The remediation of organohalides from water is a challenging process in environment protection and water treatment. Herein, we report a molecular copper(I) complex with two triazole units, CuT2, in a heterogeneous aqueous system that is capable of dechlorinating dichloromethane (CH2Cl2) to afford hydrocarbons (methane, ethane, and ethylene). The catalytic performance is evaluated in water and presented high Faradaic efficiency (average 70% CH4) across a range of potentials (-1.1 to -1.6 V vs Ag/AgCl) and high activity (maximum -25.1 mA/cm2 at -1.6 V vs Ag/AgCl) with a turnover number of 2.0 × 107. The CuT2 catalyst also showed excellent stability for 14 h of constant exposure to CH2Cl2 and 10 h of CH2Cl2 exposure cycling. The control compound, a copper-free triazole unit (T1), was also investigated under the same condition and showed inferior catalytic activity, indicating the importance of the copper center. Plausible catalytic mechanisms are proposed for the formation of C1 and C2 products via radical intermediates. Computational studies provided additional insight into the reaction mechanism and the selectivity toward the CH4 formation. The findings in this study demonstrate that complex CuT2 is an efficient and stable catalyst for the dehalogenation of CH2Cl2 and could potentially be used for the exploration of the removal of halogenated species from aqueous systems.
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Affiliation(s)
- Caroline K Williams
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221, United States
| | - Gavin A McCarver
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Amir Lashgari
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221, United States
| | - Konstantinos D Vogiatzis
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Jianbing Jimmy Jiang
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221, United States
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16
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Kokkala P, Rajeshkumar T, Mpakali A, Stratikos E, Vogiatzis KD, Georgiadis D. A Carbodiimide-Mediated P-C Bond-Forming Reaction: Mild Amidoalkylation of P-Nucleophiles by Boc-Aminals. Org Lett 2021; 23:1726-1730. [PMID: 33617265 DOI: 10.1021/acs.orglett.1c00155] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first example of a carbodiimide-mediated P-C bond-forming reaction is described. The reaction involves activation of β-carboxyethylphosphinic acids and subsequent reaction with Boc-aminals using acid-catalysis. Mechanistic experiments using 31P NMR spectroscopy and DFT calculations support the contribution of unusually reactive cyclic phosphinic/carboxylic mixed anhydrides in a reaction pathway involving ion-pair "swapping". The utility of this protocol is highlighted by the direct synthesis of Boc-protected phosphinic dipeptides, as precursors to potent Zn-aminopeptidase inhibitors.
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Affiliation(s)
- Paraskevi Kokkala
- Department of Chemistry, Laboratory of Organic Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, 15784, Athens, Greece
| | - Thayalan Rajeshkumar
- Department of Chemistry, University of Tennessee Knoxville, Knoxville, Tennessee 37996, United States
| | - Anastasia Mpakali
- National Centre for Scientific Research Demokritos, Patriarchou Gregoriou and Neapoleos 27, Agia Paraskevi, 15341 Athens, Greece
| | - Efstratios Stratikos
- National Centre for Scientific Research Demokritos, Patriarchou Gregoriou and Neapoleos 27, Agia Paraskevi, 15341 Athens, Greece.,Department of Chemistry, Laboratory of Biochemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, 15784, Athens, Greece
| | - Konstantinos D Vogiatzis
- Department of Chemistry, University of Tennessee Knoxville, Knoxville, Tennessee 37996, United States
| | - Dimitris Georgiadis
- Department of Chemistry, Laboratory of Organic Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, 15784, Athens, Greece
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17
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Affiliation(s)
- Jacob Townsend
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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18
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Metavarayuth K, Ejegbavwo O, McCarver G, Myrick ML, Makris TM, Vogiatzis KD, Senanayake SD, Manley OM, Ebrahim AM, Frenkel AI, Hwang S, Rajeshkumar T, Jimenez JD, Chen K, Shustova NB, Chen DA. Direct Identification of Mixed-Metal Centers in Metal-Organic Frameworks: Cu 3(BTC) 2 Transmetalated with Rh 2+ Ions. J Phys Chem Lett 2020; 11:8138-8144. [PMID: 32894952 DOI: 10.1021/acs.jpclett.0c02539] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Raman spectroscopy was used to establish direct evidence of heterometallic metal centers in a metal-organic framework (MOF). The Cu3(BTC)2 MOF HKUST-1 (BTC3- = benzenetricarboxylate) was transmetalated by heating it in a solution of RhCl3 to substitute Rh2+ ions for Cu2+ ions in the dinuclear paddlewheel nodes of the framework. In addition to the Cu-Cu and Rh-Rh stretching modes, Raman spectra of (CuxRh1-x)3(BTC)2 show the Cu-Rh stretching mode, indicating that mixed-metal Cu-Rh nodes are formed after transmetalation. Density functional theory studies confirmed the assignment of a Raman peak at 285 cm-1 to the Cu-Rh stretching vibration. Electron paramagnetic resonance spectroscopy experiments further supported the conclusion that Rh2+ ions are substituted into the paddlewheel nodes of Cu3(BTC)2 to form an isostructural heterometallic MOF, and electron microscopy studies showed that Rh and Cu are homogeneously distributed in (CuxRh1-x)3(BTC)2 on the nanoscale.
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Affiliation(s)
- Kamolrat Metavarayuth
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Otega Ejegbavwo
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Gavin McCarver
- Department of Chemistry, University of Tennessee Knoxville, Knoxville, Tennessee 37996, United States
| | - Michael L Myrick
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Thomas M Makris
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Konstantinos D Vogiatzis
- Department of Chemistry, University of Tennessee Knoxville, Knoxville, Tennessee 37996, United States
| | - Sanjaya D Senanayake
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Olivia M Manley
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Amani M Ebrahim
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Anatoly I Frenkel
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Sooyeon Hwang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Thayalan Rajeshkumar
- Department of Chemistry, University of Tennessee Knoxville, Knoxville, Tennessee 37996, United States
| | - Juan D Jimenez
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Kexun Chen
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Natalia B Shustova
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Donna A Chen
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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19
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Higgins MA, Maroon CR, Townsend J, Wang X, Vogiatzis KD, Long BK. Evaluating the impact of functional groups on membrane‐mediated
CO
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gas separations using a common polymer backbone. Journal of Polymer Science 2020. [DOI: 10.1002/pol.20200150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Morgan A. Higgins
- Department of Chemistry University of Tennessee Knoxville Tennessee USA
| | | | - Jacob Townsend
- Department of Chemistry University of Tennessee Knoxville Tennessee USA
| | - Xinyi Wang
- Department of Chemistry University of Tennessee Knoxville Tennessee USA
| | | | - Brian K. Long
- Department of Chemistry University of Tennessee Knoxville Tennessee USA
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20
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McCarver GA, Hinde RJ, Vogiatzis KD. Selecting Quantum-Chemical Methods for Lanthanide-Containing Molecules: A Balance between Accuracy and Efficiency. Inorg Chem 2020; 59:10492-10500. [DOI: 10.1021/acs.inorgchem.0c00808] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Gavin A. McCarver
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Robert J. Hinde
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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21
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Townsend J, Micucci CP, Hymel JH, Maroulas V, Vogiatzis KD. Author Correction: Representation of molecular structures with persistent homology for machine learning applications in chemistry. Nat Commun 2020; 11:3579. [PMID: 32665553 PMCID: PMC7360563 DOI: 10.1038/s41467-020-17423-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Jacob Townsend
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996-1600, USA
| | | | - John H Hymel
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996-1600, USA
| | - Vasileios Maroulas
- Department of Mathematics, University of Tennessee, Knoxville, TN, 37996-1320, USA.
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22
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Townsend J, Micucci CP, Hymel JH, Maroulas V, Vogiatzis KD. Representation of molecular structures with persistent homology for machine learning applications in chemistry. Nat Commun 2020; 11:3230. [PMID: 32591514 PMCID: PMC7319956 DOI: 10.1038/s41467-020-17035-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 05/28/2020] [Indexed: 11/27/2022] Open
Abstract
Machine learning and high-throughput computational screening have been valuable tools in accelerated first-principles screening for the discovery of the next generation of functionalized molecules and materials. The application of machine learning for chemical applications requires the conversion of molecular structures to a machine-readable format known as a molecular representation. The choice of such representations impacts the performance and outcomes of chemical machine learning methods. Herein, we present a new concise molecular representation derived from persistent homology, an applied branch of mathematics. We have demonstrated its applicability in a high-throughput computational screening of a large molecular database (GDB-9) with more than 133,000 organic molecules. Our target is to identify novel molecules that selectively interact with CO2. The methodology and performance of the novel molecular fingerprinting method is presented and the new chemically-driven persistence image representation is used to screen the GDB-9 database to suggest molecules and/or functional groups with enhanced properties.
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Affiliation(s)
- Jacob Townsend
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996-1600, USA
| | | | - John H Hymel
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996-1600, USA
| | - Vasileios Maroulas
- Department of Mathematics, University of Tennessee, Knoxville, TN, 37996-1320, USA.
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23
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Aprà E, Bylaska EJ, de Jong WA, Govind N, Kowalski K, Straatsma TP, Valiev M, van Dam HJJ, Alexeev Y, Anchell J, Anisimov V, Aquino FW, Atta-Fynn R, Autschbach J, Bauman NP, Becca JC, Bernholdt DE, Bhaskaran-Nair K, Bogatko S, Borowski P, Boschen J, Brabec J, Bruner A, Cauët E, Chen Y, Chuev GN, Cramer CJ, Daily J, Deegan MJO, Dunning TH, Dupuis M, Dyall KG, Fann GI, Fischer SA, Fonari A, Früchtl H, Gagliardi L, Garza J, Gawande N, Ghosh S, Glaesemann K, Götz AW, Hammond J, Helms V, Hermes ED, Hirao K, Hirata S, Jacquelin M, Jensen L, Johnson BG, Jónsson H, Kendall RA, Klemm M, Kobayashi R, Konkov V, Krishnamoorthy S, Krishnan M, Lin Z, Lins RD, Littlefield RJ, Logsdail AJ, Lopata K, Ma W, Marenich AV, Martin Del Campo J, Mejia-Rodriguez D, Moore JE, Mullin JM, Nakajima T, Nascimento DR, Nichols JA, Nichols PJ, Nieplocha J, Otero-de-la-Roza A, Palmer B, Panyala A, Pirojsirikul T, Peng B, Peverati R, Pittner J, Pollack L, Richard RM, Sadayappan P, Schatz GC, Shelton WA, Silverstein DW, Smith DMA, Soares TA, Song D, Swart M, Taylor HL, Thomas GS, Tipparaju V, Truhlar DG, Tsemekhman K, Van Voorhis T, Vázquez-Mayagoitia Á, Verma P, Villa O, Vishnu A, Vogiatzis KD, Wang D, Weare JH, Williamson MJ, Windus TL, Woliński K, Wong AT, Wu Q, Yang C, Yu Q, Zacharias M, Zhang Z, Zhao Y, Harrison RJ. NWChem: Past, present, and future. J Chem Phys 2020; 152:184102. [PMID: 32414274 DOI: 10.1063/5.0004997] [Citation(s) in RCA: 275] [Impact Index Per Article: 68.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Specialized computational chemistry packages have permanently reshaped the landscape of chemical and materials science by providing tools to support and guide experimental efforts and for the prediction of atomistic and electronic properties. In this regard, electronic structure packages have played a special role by using first-principle-driven methodologies to model complex chemical and materials processes. Over the past few decades, the rapid development of computing technologies and the tremendous increase in computational power have offered a unique chance to study complex transformations using sophisticated and predictive many-body techniques that describe correlated behavior of electrons in molecular and condensed phase systems at different levels of theory. In enabling these simulations, novel parallel algorithms have been able to take advantage of computational resources to address the polynomial scaling of electronic structure methods. In this paper, we briefly review the NWChem computational chemistry suite, including its history, design principles, parallel tools, current capabilities, outreach, and outlook.
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Affiliation(s)
- E Aprà
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - E J Bylaska
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - W A de Jong
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - N Govind
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - K Kowalski
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - T P Straatsma
- National Center for Computational Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M Valiev
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - H J J van Dam
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Y Alexeev
- Argonne Leadership Computing Facility, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Anchell
- Intel Corporation, Santa Clara, California 95054, USA
| | - V Anisimov
- Argonne Leadership Computing Facility, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - F W Aquino
- QSimulate, Cambridge, Massachusetts 02139, USA
| | - R Atta-Fynn
- Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019, USA
| | - J Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - N P Bauman
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - J C Becca
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - D E Bernholdt
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | | | - S Bogatko
- 4G Clinical, Wellesley, Massachusetts 02481, USA
| | - P Borowski
- Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, 20-031 Lublin, Poland
| | - J Boschen
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - J Brabec
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 18223 Prague 8, Czech Republic
| | - A Bruner
- Department of Chemistry and Physics, University of Tennessee at Martin, Martin, Tennessee 38238, USA
| | - E Cauët
- Service de Chimie Quantique et Photophysique (CP 160/09), Université libre de Bruxelles, B-1050 Brussels, Belgium
| | - Y Chen
- Facebook, Menlo Park, California 94025, USA
| | - G N Chuev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Science, Pushchino, Moscow Region 142290, Russia
| | - C J Cramer
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - J Daily
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - M J O Deegan
- SKAO, Jodrell Bank Observatory, Macclesfield SK11 9DL, United Kingdom
| | - T H Dunning
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - M Dupuis
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - K G Dyall
- Dirac Solutions, Portland, Oregon 97229, USA
| | - G I Fann
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - S A Fischer
- Chemistry Division, U. S. Naval Research Laboratory, Washington, DC 20375, USA
| | - A Fonari
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - H Früchtl
- EaStCHEM and School of Chemistry, University of St. Andrews, St. Andrews KY16 9ST, United Kingdom
| | - L Gagliardi
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - J Garza
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Col. Vicentina, Iztapalapa, C.P. 09340 Ciudad de México, Mexico
| | - N Gawande
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - S Ghosh
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 5545, USA
| | - K Glaesemann
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - A W Götz
- San Diego Supercomputer Center, University of California, San Diego, La Jolla, California 92093, USA
| | - J Hammond
- Intel Corporation, Santa Clara, California 95054, USA
| | - V Helms
- Center for Bioinformatics, Saarland University, D-66041 Saarbrücken, Germany
| | - E D Hermes
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551, USA
| | - K Hirao
- Next-generation Molecular Theory Unit, Advanced Science Institute, RIKEN, Saitama 351-0198, Japan
| | - S Hirata
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - M Jacquelin
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - L Jensen
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - B G Johnson
- Acrobatiq, Pittsburgh, Pennsylvania 15206, USA
| | - H Jónsson
- Faculty of Physical Sciences, University of Iceland, Reykjavík, Iceland and Department of Applied Physics, Aalto University, FI-00076 Aalto, Espoo, Finland
| | - R A Kendall
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M Klemm
- Intel Corporation, Santa Clara, California 95054, USA
| | - R Kobayashi
- ANU Supercomputer Facility, Australian National University, Canberra, Australia
| | - V Konkov
- Chemistry Program, Florida Institute of Technology, Melbourne, Florida 32901, USA
| | - S Krishnamoorthy
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - M Krishnan
- Facebook, Menlo Park, California 94025, USA
| | - Z Lin
- Department of Physics, University of Science and Technology of China, Hefei, China
| | - R D Lins
- Aggeu Magalhaes Institute, Oswaldo Cruz Foundation, Recife, Brazil
| | | | - A J Logsdail
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, Wales CF10 3AT, United Kingdom
| | - K Lopata
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - W Ma
- Institute of Software, Chinese Academy of Sciences, Beijing, China
| | - A V Marenich
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - J Martin Del Campo
- Departamento de Física y Química Teórica, Facultad de Química, Universidad Nacional Autónoma de México, México City, Mexico
| | - D Mejia-Rodriguez
- Quantum Theory Project, Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - J E Moore
- Intel Corporation, Santa Clara, California 95054, USA
| | - J M Mullin
- DCI-Solutions, Aberdeen Proving Ground, Maryland 21005, USA
| | - T Nakajima
- Computational Molecular Science Research Team, RIKEN Center for Computational Science, Kobe, Hyogo 650-0047, Japan
| | - D R Nascimento
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - J A Nichols
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - P J Nichols
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J Nieplocha
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - A Otero-de-la-Roza
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006 Oviedo, Spain
| | - B Palmer
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - A Panyala
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - T Pirojsirikul
- Department of Chemistry, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - B Peng
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - R Peverati
- Chemistry Program, Florida Institute of Technology, Melbourne, Florida 32901, USA
| | - J Pittner
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., 18223 Prague 8, Czech Republic
| | - L Pollack
- StudyPoint, Boston, Massachusetts 02114, USA
| | | | - P Sadayappan
- School of Computing, University of Utah, Salt Lake City, Utah 84112, USA
| | - G C Schatz
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
| | - W A Shelton
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | | | - D M A Smith
- Intel Corporation, Santa Clara, California 95054, USA
| | - T A Soares
- Dept. of Fundamental Chemistry, Universidade Federal de Pernambuco, Recife, Brazil
| | - D Song
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - M Swart
- ICREA, 08010 Barcelona, Spain and Universitat Girona, Institut de Química Computacional i Catàlisi, Campus Montilivi, 17003 Girona, Spain
| | - H L Taylor
- CD-adapco/Siemens, Melville, New York 11747, USA
| | - G S Thomas
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - V Tipparaju
- Cray Inc., Bloomington, Minnesota 55425, USA
| | - D G Truhlar
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | | | - T Van Voorhis
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Á Vázquez-Mayagoitia
- Argonne Leadership Computing Facility, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - P Verma
- 1QBit, Vancouver, British Columbia V6E 4B1, Canada
| | - O Villa
- NVIDIA, Santa Clara, California 95051, USA
| | - A Vishnu
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - K D Vogiatzis
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - D Wang
- College of Physics and Electronics, Shandong Normal University, Jinan, Shandong 250014, China
| | - J H Weare
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA
| | - M J Williamson
- Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - T L Windus
- Department of Chemistry, Iowa State University and Ames Laboratory, Ames, Iowa 50011, USA
| | - K Woliński
- Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, 20-031 Lublin, Poland
| | - A T Wong
- Qwil, San Francisco, California 94107, USA
| | - Q Wu
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Yang
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Q Yu
- AMD, Santa Clara, California 95054, USA
| | - M Zacharias
- Department of Physics, Technical University of Munich, 85748 Garching, Germany
| | - Z Zhang
- Stanford Research Computing Center, Stanford University, Stanford, California 94305, USA
| | - Y Zhao
- State Key Laboratory of Silicate Materials for Architectures, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - R J Harrison
- Institute for Advanced Computational Science, Stony Brook University, Stony Brook, New York 11794, USA
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24
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Cao PF, Li B, Yang G, Zhao S, Townsend J, Xing K, Qiang Z, Vogiatzis KD, Sokolov AP, Nanda J, Saito T. Elastic Single-Ion Conducting Polymer Electrolytes: Toward a Versatile Approach for Intrinsically Stretchable Functional Polymers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02683] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Peng-Fei Cao
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Bingrui Li
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Guang Yang
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Sheng Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jacob Townsend
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Kunyue Xing
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Zhe Qiang
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | | | - Alexei P. Sokolov
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jagjit Nanda
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Tomonori Saito
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
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25
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Stauber JM, Bloch ED, Vogiatzis KD, Zheng SL, Hadt RG, Hayes D, Chen LX, Gagliardi L, Nocera DG, Cummins CC. Retraction of “Pushing Single-Oxygen-Atom-Bridged Bimetallic Systems to the Right: A Cryptand-Encapsulated Co–O–Co Unit”. J Am Chem Soc 2020; 142:6834. [DOI: 10.1021/jacs.0c01749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Maroon CR, Townsend J, Higgins MA, Harrigan DJ, Sundell BJ, Lawrence JA, O'Brien JT, O'Neal D, Vogiatzis KD, Long BK. Addition-type alkoxysilyl-substituted polynorbornenes for post-combustion carbon dioxide separations. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117532] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Abstract
Borylated polymers are emerging as valuable chemosensors that can report analyte binding through an array of responses. Condensing aryl boronic acids onto polyvinyl alcohol affords fluorescent polymers that can detect and extract borophilic anions.
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Affiliation(s)
- Brian P. Jacobs
- Dabney-Buehler Hall
- Department of Chemistry
- University of Tennessee
- Knoxville
- Knoxville
| | - Jacob Townsend
- Dabney-Buehler Hall
- Department of Chemistry
- University of Tennessee
- Knoxville
- Knoxville
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28
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Abstract
High carbon emissions have shown a strong correlation with rising global temperatures as the world's climate undergoes a dramatic shift. Work to mitigate the potential damage using materials such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and polymer membranes (PMs) has proven successful in small-scale approaches; however, research is still being performed to enhance the capabilities of these materials for use at an industrial scale. One strategy for increasing performance is to embed these materials with CO2-philic molecules, which enhance selective binding over other gases. Calixarenes are promising candidates due to their large chalice shape, which allows for the possibility to bind multiple CO2 molecules per site. In this study, a dataset including 40 functionalized calixarene structures and one unfunctionalized (bare) calixarene was constructed with an automated, high-throughput structure generation through directed modifications to a molecular scaffold. A conformational search based on molecular mechanics allowed the faster determination of optimal binding energies for a vast array of chemical functional groups with less computational effort. Density functional theory and symmetry-adapted perturbation theory calculations were performed for the exploration of their interactions with CO2. Our work has identified new organic cages with increased CO2-philicity. In four cases, CO2 binding is stronger than 9.0 kcal/mol and very close to the targets set by previous studies. The nature of the noncovalent interactions for these cases is analyzed and discussed. Conclusions from this study can aid synthetic efforts for the next generation of functional materials.
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Affiliation(s)
- John H Hymel
- Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996-1600 , United States
| | - Jacob Townsend
- Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996-1600 , United States
| | - Konstantinos D Vogiatzis
- Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996-1600 , United States
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29
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Shakya DM, Ejegbavwo OA, Rajeshkumar T, Senanayake SD, Brandt AJ, Farzandh S, Acharya N, Ebrahim AM, Frenkel AI, Rui N, Tate GL, Monnier JR, Vogiatzis KD, Shustova NB, Chen DA. Selective Catalytic Chemistry at Rhodium(II) Nodes in Bimetallic Metal–Organic Frameworks. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908761] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Deependra M. Shakya
- Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 USA
| | - Otega A. Ejegbavwo
- Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 USA
| | | | | | - Amy J. Brandt
- Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 USA
| | - Sharfa Farzandh
- Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 USA
| | - Narayan Acharya
- Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 USA
| | - Amani M. Ebrahim
- Department of Materials Science and Chemical Engineering Stony Brook University Stony Brook NY 11794 USA
| | - Anatoly I. Frenkel
- Chemistry Division Brookhaven National Laboratory Upton NY 11973 USA
- Department of Materials Science and Chemical Engineering Stony Brook University Stony Brook NY 11794 USA
| | - Ning Rui
- Chemistry Division Brookhaven National Laboratory Upton NY 11973 USA
| | - Gregory L. Tate
- Department of Chemical Engineering University of South Carolina Columbia SC 29208 USA
| | - John R. Monnier
- Department of Chemical Engineering University of South Carolina Columbia SC 29208 USA
| | | | - Natalia B. Shustova
- Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 USA
| | - Donna A. Chen
- Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 USA
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30
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Shakya DM, Ejegbavwo OA, Rajeshkumar T, Senanayake SD, Brandt AJ, Farzandh S, Acharya N, Ebrahim AM, Frenkel AI, Rui N, Tate GL, Monnier JR, Vogiatzis KD, Shustova NB, Chen DA. Selective Catalytic Chemistry at Rhodium(II) Nodes in Bimetallic Metal-Organic Frameworks. Angew Chem Int Ed Engl 2019; 58:16533-16537. [PMID: 31529667 DOI: 10.1002/anie.201908761] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 08/15/2019] [Indexed: 11/06/2022]
Abstract
We report the first study of a gas-phase reaction catalyzed by highly dispersed sites at the metal nodes of a crystalline metal-organic framework (MOF). Specifically, CuRhBTC (BTC3- =benzenetricarboxylate) exhibited hydrogenation activity, while other isostructural monometallic and bimetallic MOFs did not. Our multi-technique characterization identifies the oxidation state of Rh in CuRhBTC as +2, which is a Rh oxidation state that has not previously been observed for crystalline MOF metal nodes. These Rh2+ sites are active for the catalytic hydrogenation of propylene to propane at room temperature, and the MOF structure stabilizes the Rh2+ oxidation state under reaction conditions. Density functional theory calculations suggest a mechanism in which hydrogen dissociation and propylene adsorption occur at the Rh2+ sites. The ability to tailor the geometry and ensemble size of the metal nodes in MOFs allows for unprecedented control of the active sites and could lead to significant advances in rational catalyst design.
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Affiliation(s)
- Deependra M Shakya
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - Otega A Ejegbavwo
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | | | | | - Amy J Brandt
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - Sharfa Farzandh
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - Narayan Acharya
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - Amani M Ebrahim
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Anatoly I Frenkel
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Ning Rui
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Gregory L Tate
- Department of Chemical Engineering, University of South Carolina, Columbia, SC, 29208, USA
| | - John R Monnier
- Department of Chemical Engineering, University of South Carolina, Columbia, SC, 29208, USA
| | | | - Natalia B Shustova
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - Donna A Chen
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
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31
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Abstract
Solving the coupled-cluster (CC) equations is a cost-prohibitive process that exhibits poor scaling with system size. These equations are solved by determining the set of amplitudes (t) that minimize the system energy with respect to the coupled-cluster equations at the selected level of truncation. Here, a novel approach to predict the converged coupled-cluster singles and doubles (CCSD) amplitudes, thus the coupled-cluster wave function, is explored by using machine learning and electronic structure properties inherent to the MP2 level. Features are collected from quantum chemical data, such as orbital energies, one-electron Hamiltonian, Coulomb, and exchange terms. The data-driven CCSD (DDCCSD) is not an alchemical method because the actual iterative coupled-cluster equations are solved. However, accurate energetics can also be obtained by bypassing solving the CC equations entirely. Our preliminary data show that it is possible to achieve remarkable speedups in solving the CCSD equations, especially when the correct physics are encoded and used for training of machine learning models.
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Affiliation(s)
- Jacob Townsend
- Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , United States
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32
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Anneser MR, Elpitiya GR, Townsend J, Johnson EJ, Powers XB, DeJesus JF, Vogiatzis KD, Jenkins DM. Unprecedented Five‐Coordinate Iron(IV) Imides Generate Divergent Spin States Based on the Imide R‐Groups. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903132] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Markus R. Anneser
- Department of Chemistry University of Tennessee Knoxville TN 37996 USA
| | - Gaya R. Elpitiya
- Department of Chemistry University of Tennessee Knoxville TN 37996 USA
| | - Jacob Townsend
- Department of Chemistry University of Tennessee Knoxville TN 37996 USA
| | - Elizabeth J. Johnson
- Department of Chemistry and Chemical Biology Harvard University Cambridge MA 02138 USA
| | - Xian B. Powers
- Department of Chemistry University of Tennessee Knoxville TN 37996 USA
| | - Joseph F. DeJesus
- Department of Chemistry University of Tennessee Knoxville TN 37996 USA
| | | | - David M. Jenkins
- Department of Chemistry University of Tennessee Knoxville TN 37996 USA
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33
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Anneser MR, Elpitiya GR, Townsend J, Johnson EJ, Powers XB, DeJesus JF, Vogiatzis KD, Jenkins DM. Unprecedented Five-Coordinate Iron(IV) Imides Generate Divergent Spin States Based on the Imide R-Groups. Angew Chem Int Ed Engl 2019; 58:8115-8118. [PMID: 30974012 PMCID: PMC6546507 DOI: 10.1002/anie.201903132] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Indexed: 01/05/2023]
Abstract
Three five-coordinate iron(IV) imide complexes have been synthesized and characterized. These novel structures have disparate spin states on the iron as a function of the R-group attached to the imide, with alkyl groups leading to low-spin diamagnetic (S=0) complexes and an aryl group leading to an intermediate-spin (S=1) complex. The different spin states lead to significant differences in the bonding about the iron center as well as the spectroscopic properties of these complexes. Mössbauer spectroscopy confirmed that all three imide complexes are in the iron(IV) oxidation state. The combination of diamagnetism and 15 N labeling allowed for the first 15 N NMR resonance recorded on an iron imide. Multi-reference calculations corroborate the experimental structural findings and suggest how the bonding is distinctly different on the imide ligand between the two spin states.
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Affiliation(s)
- Markus R Anneser
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA
| | - Gaya R Elpitiya
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA
| | - Jacob Townsend
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA
| | - Elizabeth J Johnson
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Xian B Powers
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA
| | - Joseph F DeJesus
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA
| | | | - David M Jenkins
- Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA
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34
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Cammarota RC, Xie J, Burgess SA, Vollmer MV, Vogiatzis KD, Ye J, Linehan JC, Appel AM, Hoffmann C, Wang X, Young VG, Lu CC. Thermodynamic and kinetic studies of H 2 and N 2 binding to bimetallic nickel-group 13 complexes and neutron structure of a Ni(η 2-H 2) adduct. Chem Sci 2019; 10:7029-7042. [PMID: 31588270 PMCID: PMC6676469 DOI: 10.1039/c9sc02018g] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/08/2019] [Indexed: 12/17/2022] Open
Abstract
Binding energies for H2 and N2 at nickel become more exergonic for the larger group 13 sigma-accepting supports.
Understanding H2 binding and activation is important in the context of designing transition metal catalysts for many processes, including hydrogenation and the interconversion of H2 with protons and electrons. This work reports the first thermodynamic and kinetic H2 binding studies for an isostructural series of first-row metal complexes: NiML, where M = Al (1), Ga (2), and In (3), and L = [N(o-(NCH2PiPr2)C6H4)3]3–. Thermodynamic free energies (ΔG°) and free energies of activation (ΔG‡) for binding equilibria were obtained via variable-temperature 31P NMR studies and lineshape analysis. The supporting metal exerts a large influence on the thermodynamic favorability of both H2 and N2 binding to Ni, with ΔG° values for H2 binding found to span nearly the entire range of previous reports. The non-classical H2 adduct, (η2-H2)NiInL (3-H2), was structurally characterized by single-crystal neutron diffraction—the first such study for a Ni(η2-H2) complex or any d10 M(η2-H2) complex. UV-Vis studies and TD-DFT calculations identified specific electronic structure perturbations of the supporting metal which poise NiML complexes for small-molecule binding. ETS-NOCV calculations indicate that H2 binding primarily occurs via H–H σ-donation to the Ni 4pz-based LUMO, which is proposed to become energetically accessible as the Ni(0)→M(iii) dative interaction increases for the larger M(iii) ions. Linear free-energy relationships are discussed, with the activation barrier for H2 binding (ΔG‡) found to decrease proportionally for more thermodynamically favorable equilibria. The ΔG° values for H2 and N2 binding to NiML complexes were also found to be more exergonic for the larger M(iii) ions.
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Affiliation(s)
- Ryan C Cammarota
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Jing Xie
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA . .,Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA.,Key Laboratory of Cluster Science of Ministry of Education , School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
| | - Samantha A Burgess
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Matthew V Vollmer
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Konstantinos D Vogiatzis
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA . .,Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA.,Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , USA
| | - Jingyun Ye
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA . .,Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA
| | - John C Linehan
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Aaron M Appel
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Christina Hoffmann
- Neutron Scattering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , USA
| | - Xiaoping Wang
- Neutron Scattering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , USA
| | - Victor G Young
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Connie C Lu
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
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35
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Townsend J, Braunscheidel NM, Vogiatzis KD. Understanding the Nature of Weak Interactions between Functionalized Boranes and N2/O2, Promising Functional Groups for Gas Separations. J Phys Chem A 2019; 123:3315-3325. [DOI: 10.1021/acs.jpca.9b00912] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jacob Townsend
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Nicole M. Braunscheidel
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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36
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Vogiatzis KD, Polynski MV, Kirkland JK, Townsend J, Hashemi A, Liu C, Pidko EA. Computational Approach to Molecular Catalysis by 3d Transition Metals: Challenges and Opportunities. Chem Rev 2019; 119:2453-2523. [PMID: 30376310 PMCID: PMC6396130 DOI: 10.1021/acs.chemrev.8b00361] [Citation(s) in RCA: 207] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Indexed: 12/28/2022]
Abstract
Computational chemistry provides a versatile toolbox for studying mechanistic details of catalytic reactions and holds promise to deliver practical strategies to enable the rational in silico catalyst design. The versatile reactivity and nontrivial electronic structure effects, common for systems based on 3d transition metals, introduce additional complexity that may represent a particular challenge to the standard computational strategies. In this review, we discuss the challenges and capabilities of modern electronic structure methods for studying the reaction mechanisms promoted by 3d transition metal molecular catalysts. Particular focus will be placed on the ways of addressing the multiconfigurational problem in electronic structure calculations and the role of expert bias in the practical utilization of the available methods. The development of density functionals designed to address transition metals is also discussed. Special emphasis is placed on the methods that account for solvation effects and the multicomponent nature of practical catalytic systems. This is followed by an overview of recent computational studies addressing the mechanistic complexity of catalytic processes by molecular catalysts based on 3d metals. Cases that involve noninnocent ligands, multicomponent reaction systems, metal-ligand and metal-metal cooperativity, as well as modeling complex catalytic systems such as metal-organic frameworks are presented. Conventionally, computational studies on catalytic mechanisms are heavily dependent on the chemical intuition and expert input of the researcher. Recent developments in advanced automated methods for reaction path analysis hold promise for eliminating such human-bias from computational catalysis studies. A brief overview of these approaches is presented in the final section of the review. The paper is closed with general concluding remarks.
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Affiliation(s)
| | | | - Justin K. Kirkland
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jacob Townsend
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Ali Hashemi
- Inorganic
Systems Engineering group, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Chong Liu
- Inorganic
Systems Engineering group, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Evgeny A. Pidko
- TheoMAT
group, ITMO University, Lomonosova 9, St. Petersburg 191002, Russia
- Inorganic
Systems Engineering group, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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37
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Maroon CR, Townsend J, Gmernicki KR, Harrigan DJ, Sundell BJ, Lawrence JA, Mahurin SM, Vogiatzis KD, Long BK. Elimination of CO2/N2 Langmuir Sorption and Promotion of “N2-Phobicity” within High-Tg Glassy Membranes. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02497] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Christopher R. Maroon
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Jacob Townsend
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Kevin R. Gmernicki
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Daniel J. Harrigan
- Aramco
Services
Company: Aramco Research Center, Boston, Massachusetts 02139, United States
| | - Benjamin J. Sundell
- Aramco
Services
Company: Aramco Research Center, Boston, Massachusetts 02139, United States
| | - John A. Lawrence
- Aramco
Services
Company: Aramco Research Center, Boston, Massachusetts 02139, United States
| | - Shannon M. Mahurin
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | | | - Brian K. Long
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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38
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Archipov T, Kirkland JK, Vogiatzis KD, Steiner A, Niedner-Schatteburg G, Weis P, Fink K, Hampe O, Kappes MM. Gas-Phase Ion Chemistry of Metalloporphyrin Anions with Molecular Oxygen: Probing the Influence of the Oxidation and Spin State of the Central Transition Metal by Experiment and Theory. J Phys Chem A 2018; 122:4357-4365. [DOI: 10.1021/acs.jpca.8b01715] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tatjana Archipov
- Institut für Physikalische Chemie and Institut für Nanotechnologie, Karlsruhe Institute of Technology, Kaiserstrasse 12, 76128 Karlsruhe, Germany
| | - Justin K. Kirkland
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Konstantinos D. Vogiatzis
- Institut für Physikalische Chemie and Institut für Nanotechnologie, Karlsruhe Institute of Technology, Kaiserstrasse 12, 76128 Karlsruhe, Germany
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Annika Steiner
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Patrick Weis
- Institut für Physikalische Chemie and Institut für Nanotechnologie, Karlsruhe Institute of Technology, Kaiserstrasse 12, 76128 Karlsruhe, Germany
| | - Karin Fink
- Institut für Physikalische Chemie and Institut für Nanotechnologie, Karlsruhe Institute of Technology, Kaiserstrasse 12, 76128 Karlsruhe, Germany
| | - Oliver Hampe
- Institut für Physikalische Chemie and Institut für Nanotechnologie, Karlsruhe Institute of Technology, Kaiserstrasse 12, 76128 Karlsruhe, Germany
| | - Manfred M. Kappes
- Institut für Physikalische Chemie and Institut für Nanotechnologie, Karlsruhe Institute of Technology, Kaiserstrasse 12, 76128 Karlsruhe, Germany
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39
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Kirkland JK, Khan SN, Casale B, Miliordos E, Vogiatzis KD. Ligand field effects on the ground and excited states of reactive FeO2+ species. Phys Chem Chem Phys 2018; 20:28786-28795. [DOI: 10.1039/c8cp05372c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Multiconfigurational quantum chemical calculations on bare and representative ligated iron oxide dicationic species suggest that weak ligand fields promote more reactive channels, whereas strong ligand fields stabilize the less reactive iron-oxo structure.
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Affiliation(s)
| | - Shahriar N. Khan
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| | - Bryan Casale
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
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40
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Vogiatzis KD, Ma D, Olsen J, Gagliardi L, de Jong WA. Pushing configuration-interaction to the limit: Towards massively parallel MCSCF calculations. J Chem Phys 2017; 147:184111. [DOI: 10.1063/1.4989858] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Affiliation(s)
- Konstantinos D. Vogiatzis
- Department of Chemistry, Minnesota Supercomputing Institute, and Chemical Theory Center, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, USA
| | - Dongxia Ma
- Department of Chemistry, Minnesota Supercomputing Institute, and Chemical Theory Center, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, USA
| | - Jeppe Olsen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Laura Gagliardi
- Department of Chemistry, Minnesota Supercomputing Institute, and Chemical Theory Center, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, USA
| | - Wibe A. de Jong
- Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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41
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Vogiatzis KD, Li G, Hensen EJM, Gagliardi L, Pidko EA. Electronic Structure of the [Cu 3(μ-O) 3] 2+ Cluster in Mordenite Zeolite and Its Effects on the Methane to Methanol Oxidation. J Phys Chem C Nanomater Interfaces 2017; 121:22295-22302. [PMID: 29051794 PMCID: PMC5641944 DOI: 10.1021/acs.jpcc.7b08714] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Indexed: 05/25/2023]
Abstract
Identifying Cu-exchanged zeolites able to activate C-H bonds and selectively convert methane to methanol is a challenge in the field of biomimetic heterogeneous catalysis. Recent experiments point to the importance of trinuclear [Cu3(μ-O)3]2+ complexes inside the micropores of mordenite (MOR) zeolite for selective oxo-functionalization of methane. The electronic structures of these species, namely, the oxidation state of Cu ions and the reactive character of the oxygen centers, are not yet fully understood. In this study, we performed a detailed analysis of the electronic structure of the [Cu3(μ-O)3]2+ site using multiconfigurational wave-function-based methods and density functional theory. The calculations reveal that all Cu sites in the cluster are predominantly present in the Cu(II) formal oxidation state with a minor contribution from Cu(III), whereas two out of three oxygen anions possess a radical character. These electronic properties, along with the high accessibility of the out-of-plane oxygen center, make this oxygen the preferred site for the homolytic C-H activation of methane by [Cu3(μ-O)3]2+. These new insights aid in the construction of a theoretical framework for the design of novel catalysts for oxyfunctionalization of natural gas and suggest further spectroscopic examination.
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Affiliation(s)
| | - Guanna Li
- Inorganic
Materials Chemistry Group, Eindhoven University
of Technology, PO Box 513, Eindhoven 5600 MB, The Netherlands
- Catalysis
Engineering, Department of Chemical Engineering, Delft University of Technology, Van Oder Massage 9, 2629 HZ Delft, The Netherlands
| | - Emiel J. M. Hensen
- Inorganic
Materials Chemistry Group, Eindhoven University
of Technology, PO Box 513, Eindhoven 5600 MB, The Netherlands
- Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Laura Gagliardi
- Department
of Chemistry, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Evgeny A. Pidko
- Inorganic
Materials Chemistry Group, Eindhoven University
of Technology, PO Box 513, Eindhoven 5600 MB, The Netherlands
- Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Eindhoven 5600 MB, The Netherlands
- Theoretical
Chemistry Group, ITMO University, Kronverkskiy pr., 49, St. Petersburg 197101, Russia
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42
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Spivak M, Vogiatzis KD, Cramer CJ, Graaf CD, Gagliardi L. Quantum Chemical Characterization of Single Molecule Magnets Based on Uranium. J Phys Chem A 2017; 121:1726-1733. [DOI: 10.1021/acs.jpca.6b10933] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mariano Spivak
- Departament
de Quimica Fisica i Inorgánica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, E-43007 Tarragona, Spain
| | - Konstantinos D. Vogiatzis
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Christopher J. Cramer
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Coen de Graaf
- Departament
de Quimica Fisica i Inorgánica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, E-43007 Tarragona, Spain
- ICREA, Passeig Lluis Companys 23, 08010 Barcelona, Spain
| | - Laura Gagliardi
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
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43
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Feng H, Hong T, Mahurin SM, Vogiatzis KD, Gmernicki KR, Long BK, Mays JW, Sokolov AP, Kang NG, Saito T. Gas separation mechanism of CO2 selective amidoxime-poly(1-trimethylsilyl-1-propyne) membranes. Polym Chem 2017. [DOI: 10.1039/c7py00056a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amidoxime functionalization on polymer matrix significantly increases CO2/N2 solubility selectivity.
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Affiliation(s)
- Hongbo Feng
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Tao Hong
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Shannon M. Mahurin
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA 37831
| | | | | | - Brian K. Long
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Jimmy W. Mays
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
- Chemical Sciences Division
| | - Alexei P. Sokolov
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
- Chemical Sciences Division
| | - Nam-Goo Kang
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Tomonori Saito
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA 37831
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44
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Xiao D, Gonzalez MI, Darago LE, Vogiatzis KD, Haldoupis E, Gagliardi L, Long JR. Selective, Tunable O2 Binding in Cobalt(II)-Triazolate/Pyrazolate Metal-Organic Frameworks. J Am Chem Soc 2016; 138:7161-70. [PMID: 27180991 PMCID: PMC4901364 DOI: 10.1021/jacs.6b03680] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Indexed: 11/30/2022]
Abstract
The air-free reaction of CoCl2 with 1,3,5-tri(1H-1,2,3-triazol-5-yl)benzene (H3BTTri) in N,N-dimethylformamide (DMF) and methanol leads to the formation of Co-BTTri (Co3[(Co4Cl)3(BTTri)8]2·DMF), a sodalite-type metal-organic framework. Desolvation of this material generates coordinatively unsaturated low-spin cobalt(II) centers that exhibit a strong preference for binding O2 over N2, with isosteric heats of adsorption (Qst) of -34(1) and -12(1) kJ/mol, respectively. The low-spin (S = 1/2) electronic configuration of the metal centers in the desolvated framework is supported by structural, magnetic susceptibility, and computational studies. A single-crystal X-ray structure determination reveals that O2 binds end-on to each framework cobalt center in a 1:1 ratio with a Co-O2 bond distance of 1.973(6) Å. Replacement of one of the triazolate linkers with a more electron-donating pyrazolate group leads to the isostructural framework Co-BDTriP (Co3[(Co4Cl)3(BDTriP)8]2·DMF; H3BDTriP = 5,5'-(5-(1H-pyrazol-4-yl)-1,3-phenylene)bis(1H-1,2,3-triazole)), which demonstrates markedly higher yet still fully reversible O2 affinities (Qst = -47(1) kJ/mol at low loadings). Electronic structure calculations suggest that the O2 adducts in Co-BTTri are best described as cobalt(II)-dioxygen species with partial electron transfer, while the stronger binding sites in Co-BDTriP form cobalt(III)-superoxo moieties. The stability, selectivity, and high O2 adsorption capacity of these materials render them promising new adsorbents for air separation processes.
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Affiliation(s)
- Dianne
J. Xiao
- Department of Chemistry and Department of Chemical
and Biomolecular Engineering, University
of California, Berkeley, California 94720, United States
| | - Miguel I. Gonzalez
- Department of Chemistry and Department of Chemical
and Biomolecular Engineering, University
of California, Berkeley, California 94720, United States
| | - Lucy E. Darago
- Department of Chemistry and Department of Chemical
and Biomolecular Engineering, University
of California, Berkeley, California 94720, United States
| | - Konstantinos D. Vogiatzis
- Department
of Chemistry, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Emmanuel Haldoupis
- Department
of Chemistry, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department
of Chemistry, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Jeffrey R. Long
- Department of Chemistry and Department of Chemical
and Biomolecular Engineering, University
of California, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
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45
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Stauber JM, Bloch ED, Vogiatzis KD, Zheng SL, Hadt RG, Hayes D, Chen LX, Gagliardi L, Nocera DG, Cummins CC. Pushing Single-Oxygen-Atom-Bridged Bimetallic Systems to the Right: A Cryptand-Encapsulated Co–O–Co Unit. J Am Chem Soc 2015; 137:15354-7. [DOI: 10.1021/jacs.5b09827] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julia M. Stauber
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Eric D. Bloch
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Konstantinos D. Vogiatzis
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Shao-Liang Zheng
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Ryan G. Hadt
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Dugan Hayes
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Lin X. Chen
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Laura Gagliardi
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Daniel G. Nocera
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Christopher C. Cummins
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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46
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Mavrandonakis A, Vogiatzis KD, Boese AD, Fink K, Heine T, Klopper W. Ab Initio Study of the Adsorption of Small Molecules on Metal–Organic Frameworks with Oxo-centered Trimetallic Building Units: The Role of the Undercoordinated Metal Ion. Inorg Chem 2015; 54:8251-63. [DOI: 10.1021/acs.inorgchem.5b00689] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Mavrandonakis
- Department
of Physics and Earth Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
| | - Konstantinos D. Vogiatzis
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - A. Daniel Boese
- Department of Chemistry, University of Graz, Heinrichstraße
28/IV, 8010 Graz, Austria
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Thomas Heine
- Department
of Physics and Earth Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
| | - Wim Klopper
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
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47
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Vogiatzis KD, Li Manni G, Stoneburner SJ, Ma D, Gagliardi L. Systematic Expansion of Active Spaces beyond the CASSCF Limit: A GASSCF/SplitGAS Benchmark Study. J Chem Theory Comput 2015; 11:3010-21. [DOI: 10.1021/acs.jctc.5b00191] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Konstantinos D. Vogiatzis
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Giovanni Li Manni
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Samuel J. Stoneburner
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Dongxia Ma
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Laura Gagliardi
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
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48
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Verma P, Vogiatzis KD, Planas N, Borycz J, Xiao DJ, Long JR, Gagliardi L, Truhlar DG. Mechanism of Oxidation of Ethane to Ethanol at Iron(IV)-Oxo Sites in Magnesium-Diluted Fe2(dobdc). J Am Chem Soc 2015; 137:5770-81. [PMID: 25882096 DOI: 10.1021/jacs.5b00382] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The catalytic properties of the metal-organic framework Fe2(dobdc), containing open Fe(II) sites, include hydroxylation of phenol by pure Fe2(dobdc) and hydroxylation of ethane by its magnesium-diluted analogue, Fe0.1Mg1.9(dobdc). In earlier work, the latter reaction was proposed to occur through a redox mechanism involving the generation of an iron(IV)-oxo species, which is an intermediate that is also observed or postulated (depending on the case) in some heme and nonheme enzymes and their model complexes. In the present work, we present a detailed mechanism by which the catalytic material, Fe0.1Mg1.9(dobdc), activates the strong C-H bonds of ethane. Kohn-Sham density functional and multireference wave function calculations have been performed to characterize the electronic structure of key species. We show that the catalytic nonheme-Fe hydroxylation of the strong C-H bond of ethane proceeds by a quintet single-state σ-attack pathway after the formation of highly reactive iron-oxo intermediate. The mechanistic pathway involves three key transition states, with the highest activation barrier for the transfer of oxygen from N2O to the Fe(II) center. The uncatalyzed reaction, where nitrous oxide directly oxidizes ethane to ethanol is found to have an activation barrier of 280 kJ/mol, in contrast to 82 kJ/mol for the slowest step in the iron(IV)-oxo catalytic mechanism. The energetics of the C-H bond activation steps of ethane and methane are also compared. Dehydrogenation and dissociation pathways that can compete with the formation of ethanol were shown to involve higher barriers than the hydroxylation pathway.
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Affiliation(s)
- Pragya Verma
- †Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Konstantinos D Vogiatzis
- †Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Nora Planas
- †Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States.,⊥Department of Chemistry, University of Wisconsin-Eau Claire, Eau Claire, Wisconsin 54702, United States
| | - Joshua Borycz
- †Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Dianne J Xiao
- ‡Department of Chemistry, University of California, Berkeley, California 94720, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Jeffrey R Long
- ‡Department of Chemistry, University of California, Berkeley, California 94720, United States.,§Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- †Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Donald G Truhlar
- †Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States.,∥Nanoporous Materials Genome Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
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49
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Siedschlag RB, Bernales V, Vogiatzis KD, Planas N, Clouston LJ, Bill E, Gagliardi L, Lu CC. Catalytic Silylation of Dinitrogen with a Dicobalt Complex. J Am Chem Soc 2015; 137:4638-41. [DOI: 10.1021/jacs.5b01445] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | | | | | | | - Eckhard Bill
- Max Planck Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
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50
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Vogiatzis KD, Klopper W, Friedrich J. Non-covalent Interactions of CO2 with Functional Groups of Metal–Organic Frameworks from a CCSD(T) Scheme Applicable to Large Systems. J Chem Theory Comput 2015; 11:1574-84. [DOI: 10.1021/ct5011888] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Konstantinos D. Vogiatzis
- Department
of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, United States
- Institute
of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg
2, D-76131 Karlsruhe, Germany
| | - Wim Klopper
- Institute
of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg
2, D-76131 Karlsruhe, Germany
| | - Joachim Friedrich
- Institute
of Chemistry, Chemnitz University of Technology, Strasse der Nationen 62, D-09111 Chemnitz, Germany
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