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Dutra FR, Vasiliu M, Gomez AN, Xia D, Dixon DA. Prediction of Redox Potentials for U, Np, Pu, and Am in Aqueous Solution. J Phys Chem A 2024; 128:5612-5626. [PMID: 38959054 DOI: 10.1021/acs.jpca.4c02902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
The redox properties of the actinides in aqueous solution are important for fuel production/reprocessing and understanding the environmental impact of nuclear waste. The redox potentials for U, Np, Pu, and Am in oxidation states from 0 up to VII (as appropriate) in aqueous solutions have been predicted at the density functional theory level with the B3LYP functional, Stuttgart small core pseudopotential basis sets for the actinides, and explicit (30H2O molecules)/implicit treatment of the aqueous solvent using the self-consistent reaction field COSMO and SMD approaches for the implicit solvation. The predictions of the structural parameters of clusters incorporating first and second solvation shells are consistent with the available experimental data. Our results are typically within 0.2 V of the available experimental data using two explicit solvation shells with an implicit solvent model. The use of the PW91 functional substantially improved the prediction of the Pu(VI/V) redox couple. The redox couples for An(VI/IV) and An(V/IV) which involve the addition of protons and removal of the actinyl oxygens led to slightly larger differences from an experiment. The An(IV/0) and An(III/0) couples were reliably predicted with our approach. Predictions of the unknown An(II/I) redox potentials were negative, consistent with expectations, and predictions for unknown An(VII/VI), An(III/II), and An(II/0) redox couples improve prior estimates.
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Affiliation(s)
- Felipe R Dutra
- Instituto de Química, Universidade Estadual de Campinas, Barão Geraldo, P.O. Box 6154, Campinas 13083-970, São Paulo, Brazil
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Amber N Gomez
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Donna Xia
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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2
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Loudermilk A, Dixon DA. Prediction of the p Ka's of Hydrated Metal Carbonates and Bicarbonates for Mg, Ca, Mn, Fe, Co, Ni, Cu, and Zn Dications. J Phys Chem A 2024; 128:5331-5343. [PMID: 38950028 DOI: 10.1021/acs.jpca.4c02879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
The gas- and aqueous-phase acidities of hydrated metal dication carbonates, bicarbonates, and hydroxide complexes M(CO3)(H2O)n for n = 1 to 3, M(HCO3)2, M(HCO3)2(H2O)2, M(HCO3)(OH), and M(HCO3)(H2O)2(OH) for M = Mg, Ca, Mn, Fe, Co, Ni, Cu, and Zn were calculated at the CCSD(T)/aug-cc-pwCVDZ/cc-pwCVDZ level in the gas phase and at the B3LYP/aug-cc-pVTZ/cc-pVTZ(-PP) level with the COSMO self-consistent reaction field (SCRF) method in the aqueous phase. The composite correlated molecular orbital theory G3(MP2) and G3(MP2)B3 methods were used to predict the pKa's of the Mg structures and cis-cis carbonic acid to provide additional benchmarks. Using values scaled to experiment for H2CO3, the pKa's of bicarbonate ligands in group 2 and transition-metal complexes were compared to carbonic acid to gauge the effect of the metal complex on the bicarbonate. The group 2 metal complexes M(HCO3)2 and M(HCO3)(OH) decreased the acidity of the bicarbonate ligands, whereas their dihydrates were even less acidic. The transition-metal di-bicarbonate and bicarbonate hydroxide complexes generally made the bicarbonate more acidic especially when reduction of the metal occurs consistent with electron donation from the ligands; this is accompanied by spin transfer which typically increases in the order Mn < Fe < Co < Ni < Cu. The transition-metal dihydrates were less acidic than carbonic acid. Using values scaled to experiment for hydrated metal dications, the pKa's of water coordinated to group 2 and transition-metal complexes were generally more acidic than the hydrated metal dications, with the exception of Ca bicarbonate dihydrate, Co carbonate, Ni di-bicarbonate dihydrate, and Cu bicarbonate hydroxide di-bicarbonate.
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Affiliation(s)
- Amanda Loudermilk
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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3
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Investigation of superacidic behavior of hydrogenated FemFn (m = 1/2, n = 1–6/11) complexes and their abilities to form supersalts. Struct Chem 2022. [DOI: 10.1007/s11224-022-02099-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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In silico designing of Si- and Ge-doped imidazolium: a new heterocyclic aromatic superacid. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02934-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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5
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Bastow TP, Douglas GB, Davis GB. Volatilization Potential of Per- and Poly-fluoroalkyl Substances from Airfield Pavements and during Recycling of Asphalt. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:2202-2208. [PMID: 35781701 PMCID: PMC9540562 DOI: 10.1002/etc.5425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/17/2022] [Accepted: 06/30/2022] [Indexed: 05/28/2023]
Abstract
Per- and poly-fluoroalkyl substances (PFAS) in water are typically present in their ionic (nonvolatile) forms; however, these can transition to their nonionic (volatile) forms when in contact with organic solvents and organic matrices. In particular, when PFAS are dissolved in organic solvents such as residues left from firefighting foams, fuels, and bitumen present in asphalt, the equilibrium between ionic and nonionic forms can trend toward more volatile nonionic forms of PFAS. We assessed the volatility of common PFAS based on calculated and available experimental data across ambient temperature ranges experienced by airfield pavements and at elevated temperatures associated with reworking asphalts for reuse. Volatilities are shown to be comparable to hydrocarbons in the semivolatile range, suggesting that volatilization is a viable loss mechanism for some PFAS that are nonvolatile in water. The present study points to future investigative needs for this unexplored mass loss mechanism and potential exposure pathway. Environ Toxicol Chem 2022;41:2202-2208. © 2022 Commonwealth of Australia. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
| | | | - Greg B. Davis
- CSIRO Land and WaterFloreatWestern AustraliaAustralia
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6
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Michele A, Paschkowski P, Hänel C, Tovar GEM, Schiestel T, Southan A. Acid catalyzed cross‐linking of polyvinyl alcohol for humidifier membranes. J Appl Polym Sci 2022. [DOI: 10.1002/app.51606] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andre Michele
- Institute of Interfacial Process Engineering and Plasma Technology IGVP University of Stuttgart Stuttgart Germany
| | - Patrick Paschkowski
- Innovation Field Membranes Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany
| | - Christopher Hänel
- Innovation Field Membranes Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany
| | - Günter E. M. Tovar
- Institute of Interfacial Process Engineering and Plasma Technology IGVP University of Stuttgart Stuttgart Germany
| | - Thomas Schiestel
- Innovation Field Membranes Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany
| | - Alexander Southan
- Institute of Interfacial Process Engineering and Plasma Technology IGVP University of Stuttgart Stuttgart Germany
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7
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Lee ZR, Quinn LJ, Jones CW, Hayes SE, Dixon DA. Predicting the Mechanism and Products of CO 2 Capture by Amines in the Presence of H 2O. J Phys Chem A 2021; 125:9802-9818. [PMID: 34748350 DOI: 10.1021/acs.jpca.1c05950] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An extensive correlated molecular orbital theory study of the reactions of CO2 with a range of substituted amines and H2O in the gas phase and aqueous solution was performed at the G3(MP2) level with a self-consistent reaction field approach. The G3(MP2) calculations were benchmarked at the CCSD(T)/CBS level for NH3 reactions. A catalytic NH3 reduces the energy barrier more than a catalytic H2O for the formation of H2NCOOH and H2CO3. In aqueous solution, the barriers to form both H2NCOOH and H2CO3 are reduced, with HCO3- formation possible with one amine present and H2NCOO- formation possible only with two amines. Further reactions of H2NCOOH to form HNCO and urea via the Bazarov reaction have high barriers and are unlikely in both the gas phase and aqueous solution. Reaction coordinates for CH3NH2, CH3CH2NH2, (CH3)2NH, CH3CH2CH2NH2, (CH3)3N, and DMAP were also calculated. The barrier for proton transfer correlates with amine basicity for alkylammonium carbamate (ΔG‡aq < 15 kcal/mol) and alkylammonium bicarbonate (ΔG‡aq < 30 kcal/mol) formation. In aqueous solution, carbamic acids, carbamates, and bicarbonates can all form in small amounts with ammonium carbamates dominating for primary and secondary alkylamines. These results have implications for CO2 capture by amines in both the gas phase and aqueous solution as well as in the solid state, if enough water is present.
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Affiliation(s)
- Zachary R Lee
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States.,Department of Biology and Chemistry, Morehead State University, Morehead, Kentucky 40351, United States
| | - La'Darious J Quinn
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Christopher W Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332, United States
| | - Sophia E Hayes
- Department of Chemistry, Washington University, 1 Brookings Drive, Saint Louis, Missouri 63130, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
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8
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Wild M, Stolz F, Naumov S, Abel B. On the in situ formation of carbenes in ionic liquids. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1974589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Martin Wild
- Leibniz Institute of Surface Engineering (IOM), Leipzig, Germany
- Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, University Leipzig, Leipzig, Germany
| | - Ferdinand Stolz
- Leibniz Institute of Surface Engineering (IOM), Leipzig, Germany
- Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, University Leipzig, Leipzig, Germany
| | - Sergej Naumov
- Leibniz Institute of Surface Engineering (IOM), Leipzig, Germany
| | - Bernd Abel
- Leibniz Institute of Surface Engineering (IOM), Leipzig, Germany
- Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, University Leipzig, Leipzig, Germany
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9
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Hor S, Oyama KI, Koga N, Tsukamoto M. Brønsted acid-catalyzed 1,4-addition of 1,3,5-trimethoxybenzene to maleimides and acrylates. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Rasheed T, Siddiqui SA, Kargeti A, Shukla DV, Singh V, Pandey AK. Exploration of superhalogen nature of Pt(CN)n complexes (n = 1–6) and their abilities to form supersalts and superacids: a DFT–D3 study. Struct Chem 2021. [DOI: 10.1007/s11224-021-01786-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Vasiliu M, Peterson KA, Dixon DA. Bond Dissociation Energies in Heavy Element Chalcogen and Halogen Small Molecules. J Phys Chem A 2021; 125:1892-1902. [PMID: 33645983 DOI: 10.1021/acs.jpca.0c11393] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Thermodynamic properties including bond dissociation energies (BDEs), heats of formation, and gas-phase acidities for the hydrides and dimers of chalcogens and halogens, H2Y, HX, Y2, and X2 for Y = Se, Te, and At and X = Br, I, and At, have been predicted using the Feller-Peterson-Dixon composite-correlated molecular orbital theory approach. A full four-component CCSD(T) approach was used to calculate the spin-orbit effects on thermodynamic properties, except for Se2, where the AoC-DHF value was used due to strong multireference effects in Se2 for the SO calculations. The calculated results show that the At2 BDE is quite small, 19.5 kcal/mol, with much of the low bond energy due to spin-orbit effects. H2Po is not predicted to be stable to dehydrogenation to Po + H2 in terms of the free energy at 298 K. In the gas phase, HAt is predicted to be a stronger acid than H2SO4. The current results provide insights into potential difficulties in the actual experimental observation of such species for heavy elements.
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Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Kirk A Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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12
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Giricheva NI, Ivanov SN, Ignatova AV, Fedorov MS, Girichev GV. The Effect of Intramolecular Hydrogen Bond Type on the Gas-Phase Deprotonation of ortho-Substituted Benzenesulfonic Acids. A Density Functional Theory Study. Molecules 2020; 25:E5806. [PMID: 33316963 PMCID: PMC7764180 DOI: 10.3390/molecules25245806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 11/30/2020] [Accepted: 12/07/2020] [Indexed: 12/01/2022] Open
Abstract
Structural factors have been identified that determine the gas-phase acidity of ortho-substituted benzenesulfonic acid, 2-XC6H4-SO3H, (X = -SO3H, -COOH, -NO2, -SO2F, -C≡N, -NH2, -CH3, -OCH3, -N(CH3)2, -OH). The DFT/B3LYP/cc-pVTZ method was used to perform conformational analysis and study the structural features of the molecular and deprotonated forms of these compounds. It has been shown that many of the conformers may contain anintramolecular hydrogen bond (IHB) between the sulfonic group and the substituent, and the sulfonic group can be an IHB donor or an acceptor. The Gibbs energies of gas-phase deprotonation ΔrG0298 (kJ mol-1) were calculated for all compounds. It has been set that in ortho-substituted benzenesulfonic acids, the formation of various types of IHB is possible, having a significant effect on the ΔrG0298 values of gas-phase deprotonation. If the -SO3H group is the IHB donor, then an ion without an IHB is formed upon deprotonation, and the deprotonation energy increases. If this group is an IHB acceptor, then a significant decrease in ΔrG0298 of gas-phase deprotonation is observed due to an increase in IHB strength and the A- anion additional stabilization. A proton donor ability comparative characteristic of the -SO3H group in the studied ortho-substituted benzenesulfonic acids is given, and the ΔrG0298 energies are compared with the corresponding values of ortho-substituted benzoic acids.
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Affiliation(s)
- Nina I. Giricheva
- Department of Fundamental and Applied Chemistry, Ivanovo State University, 153025 Ivanovo, Russia; (S.N.I.); (A.V.I.); (M.S.F.)
| | - Sergey N. Ivanov
- Department of Fundamental and Applied Chemistry, Ivanovo State University, 153025 Ivanovo, Russia; (S.N.I.); (A.V.I.); (M.S.F.)
| | - Anastasiya V. Ignatova
- Department of Fundamental and Applied Chemistry, Ivanovo State University, 153025 Ivanovo, Russia; (S.N.I.); (A.V.I.); (M.S.F.)
| | - Mikhail S. Fedorov
- Department of Fundamental and Applied Chemistry, Ivanovo State University, 153025 Ivanovo, Russia; (S.N.I.); (A.V.I.); (M.S.F.)
| | - Georgiy V. Girichev
- Department of Physics, Ivanovo State University of Chemistry and Technology, 153000 Ivanovo, Russia;
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13
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Stein TH, Vasiliu M, Arduengo AJ, Dixon DA. Lewis Acidity and Basicity: Another Measure of Carbene Reactivity. J Phys Chem A 2020; 124:6096-6103. [DOI: 10.1021/acs.jpca.0c03877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Trent H. Stein
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Anthony J. Arduengo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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14
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Brzeski J, Czapla M, Skurski P. Icosahedral Carborane Superacids and their Conjugate Bases Comprising H, F, Cl, and CN Substituents: A Theoretical Investigation of Monomeric and Dimeric Cages. Chempluschem 2020; 85:312-318. [PMID: 32031331 DOI: 10.1002/cplu.202000007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 01/29/2020] [Indexed: 11/08/2022]
Abstract
Theoretical investigation of the H(CHB11 X11 ) (X=H, F, Cl, CN), H(CHB11 Xn Y11-n ) (X,Y=F, Cl; n=1,5), and dimeric (H(CHB11 X11 ))2 (X=F, Cl) carborane superacids performed at the B3LYP/6-311++G(d,p) theory level revealed the similarity of their equilibrium structures and the possibility of nearly barrierless hydrogen atom migration among the substituents attached to one side of the icosahedral CB11 cage. The vertical electron detachment energies predicted at the OVGF/6-311++G(3df,2pd) theory level for the conjugate bases (CHB11 X11 )- were found to span the 5.82-9.00 ev range. The acid strengths (manifested by the Gibbs free deprotonation energies spanning the 213-266 kcal/mol range) predicted for the icosahedral H(CHB11 X11 ) carborane systems confirm their superacidic properties which might be increased even further by the attachment of the second carborane H(CHB11 X11 ) unit that leads to a dimeric structure mimicking a part of an experimentally observed H-bridged polymeric chain. The Gibbs free deprotonation energy of the dimeric (H(CHB11 Cl11 ))2 acid was predicted to be smaller by 17 kcal/mol than that of the corresponding monomeric H(CHB11 Cl11 ) acid.
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Affiliation(s)
- Jakub Brzeski
- Laboratory of Quantum Chemistry Department of Theoretical Chemistry Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland
| | - Marcin Czapla
- Laboratory of Quantum Chemistry Department of Theoretical Chemistry Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland
| | - Piotr Skurski
- Laboratory of Quantum Chemistry Department of Theoretical Chemistry Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland
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15
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Persaud RR, Dieke NE, Jing X, Lambert S, Parsa N, Hartmann E, Vincent JB, Cassady CJ, Dixon DA. Mechanistic Study of Enhanced Protonation by Chromium(III) in Electrospray Ionization: A Superacid Bound to a Peptide. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:308-318. [PMID: 32031389 DOI: 10.1021/jasms.9b00078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Addition of trivalent chromium, Cr(III), to solutions undergoing electrospray ionization (ESI) enhances protonation and leads to formation of [M + 2H]2+ for peptides that normally produce [M + H]+. This effect is explored using electronic structure calculations at the density functional theory (DFT) level to predict the energetics of various species that are potentially important to the mechanism. Gas- and solution-phase reaction free energies for glycine and its anion reacting with [Cr(III)(H2O)6]3+ and for dehydration of these species have been predicted, where glycine is used as a simple model for a peptide. For comparison, calculations were also performed with Fe(III), Al(III), Sc(III), Y(III), and La(III). Removal of water from these complexes, as would occur during the ESI desolvation process, results in species that are highly acidic. The calculated pKa of Cr(III) with a single solvation shell is -10.8, making [Cr(III)(H2O)6]3+ a superacid that is more acidic than sulfuric acid (pKa = -8.8). Binding to glycine requires removal of two aqua ligands, which gives [Cr(III)(H2O)4]3+ that has an extremely acidic pKa of -28.8. Removal of additional water further enhances acidity, reaching a pKa of -84.7 for [Cr(III)(H2O)]3+. A mechanism for enhanced protonation is proposed that incorporates computational and experiment results, as well as information on the known chemistry of Cr(III), which is substitutionally inert. The initial step involves binding of [Cr(III)(H2O)4]3+ to the deprotonated C-terminus of a peptide. As the drying process during ESI strips water from the complex, the resulting superacid transfers protons to the bound peptide, eventually leading to formation of [M + 2H]2+.
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Affiliation(s)
- Rudradatt R Persaud
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Nnenna E Dieke
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Xinyao Jing
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Skyler Lambert
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Nicholas Parsa
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Elizabeth Hartmann
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - John B Vincent
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Carolyn J Cassady
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - David A Dixon
- Department of Chemistry & Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
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Parida R, Nambiar SR, Reddy GN, Giri S. Designing aromatic heterocyclic superacids in terms of Brønsted and Lewis perspectives. Phys Chem Chem Phys 2020; 22:1923-1931. [PMID: 31912831 DOI: 10.1039/c9cp06054e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The unexplored area of organic superacids was investigated in terms of both Brønsted and Lewis concepts of acids and bases. The primary requirement of a superacid-high affinity for electron/fluoride ions was fulfilled using two strategies: (i) using the superhalogen-type heterocyclic framework and (ii) selecting systems that have an electron count one short of attaining (4n + 2) Hückel aromaticity. With these in mind, eleven systems were considered throughout the study, expected to cross the target of 100% H2SO4 acidity and/or the fluoride affinity of SbF5. To enhance the pKa and F- affinity values of the considered systems, electron-withdrawing ligands F and CN were employed. The superhalogen and aromaticity properties were verified by vertical detachment energy (VDE) and nucleus independent chemical shift (NICS) calculations, respectively. Finally, the collective effect of the potential super Lewis acids was looked into using a BL3 skeleton with them acting as ligands.
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Affiliation(s)
- Rakesh Parida
- School of Applied Sciences and Humanities, Haldia Institute of Technology, Haldia, 721657, India. and Department of Chemistry, National Institute of Technology Rourkela, Odisha 769008, India
| | - Sachin Ramesh Nambiar
- Department of Chemistry, National Institute of Technology Rourkela, Odisha 769008, India
| | - G Naaresh Reddy
- School of Applied Sciences and Humanities, Haldia Institute of Technology, Haldia, 721657, India. and Department of Chemistry, National Institute of Technology Rourkela, Odisha 769008, India
| | - Santanab Giri
- School of Applied Sciences and Humanities, Haldia Institute of Technology, Haldia, 721657, India.
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Leesment A, Kaljurand I, Trummal A, Kütt A, Netscher T, Bonrath W, Leito I. Validation and extension of the gas-phase superacidity scale. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2019:e8598. [PMID: 31756781 DOI: 10.1002/rcm.8598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 09/08/2019] [Indexed: 06/10/2023]
Abstract
RATIONALE In recent years it has become increasingly evident that the previously reported experimental gas-phase acidity (GA) values of several strong acids differ markedly from the corresponding high-level computational values. In this work, the superacidic part of the current gas-phase acidity scale was validated and extended. METHODS For that, the strongly acidic section of the gas-phase acidity scale was remeasured using the equilibrium Fourier transform ion cyclotron resonance (FTICR-MS) method, adding new compounds and introducing methodological changes. In particular, a novel approach for anchoring the scale was used - the results were anchored to the computational (W1BD) GA values of trifluoromethanesulfonic acid and bis(fluorosulfonyl)imide (291.3 and 286.2 kcal mol-1 , respectively). RESULTS The newly measured section consists of 20 gas-phase superacids and its consistency standard deviation is 0.2 kcal mol-1 , indicating good consistency. In contrast to the previously reported experimental gas-phase acidities for a number of important superacids, the current results are consistent with high-level theoretical GA values. Structure-acidity relationships based on the current results as well as available MeCN and DCE acidity data were described and explained. CONCLUSIONS The introduced methodological innovations were found to be adequate and strong evidence is presented in support of the current GA values of the strong acids.
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Affiliation(s)
- Andre Leesment
- Institute of Chemistry, University of Tartu, 14a Ravila Street, Tartu, 50411, Estonia
| | - Ivari Kaljurand
- Institute of Chemistry, University of Tartu, 14a Ravila Street, Tartu, 50411, Estonia
| | - Aleksander Trummal
- National Institute of Chemical Physics and Biophysics, 23 Akadeemia tee, Tallinn, 12618, Estonia
| | - Agnes Kütt
- Institute of Chemistry, University of Tartu, 14a Ravila Street, Tartu, 50411, Estonia
| | - Thomas Netscher
- DSM Nutritional Products, Research and Development, Basel, CH-4002, Switzerland
| | - Werner Bonrath
- DSM Nutritional Products, Research and Development, Basel, CH-4002, Switzerland
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, 14a Ravila Street, Tartu, 50411, Estonia
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18
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Lee ZR, Zhang S, Flores LA, Dixon DA. Predicting the Formation of Sulfur-Based Brønsted Acids from the Reactions of SOx with H2O and H2S. J Phys Chem A 2019; 123:10169-10183. [DOI: 10.1021/acs.jpca.9b08433] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zachary R. Lee
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Shengjie Zhang
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Luis A. Flores
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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19
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Fedorova IV, Safonova LP. Quantum Chemical Modeling of the Structure and H Bonding in Triethanolammonium-Based Protic Ionic Liquids with Sulfonic Acids. J Phys Chem A 2019; 123:3735-3742. [PMID: 30950617 DOI: 10.1021/acs.jpca.9b01189] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The results of electronic structure calculations based on density functional theory (DFT) for protic ionic liquids (PILs) consisting of triethanolammonium cation paired with anion of different sulfonic acids are reported. The influence of the anion nature on the structure and interactions in the ion pairs that are formed in these PILs is discussed in detail. Multiple H-bonding interactions exist between the protons in the NH/OH groups of the cation and different oxygen atoms of the acid anion in the ion pairs. The quantum theory of "atoms in molecules" has been used to estimate the individual contributions of each hydrogen bond to the stability of the ion pair. The hydrogen-bonding interactions in the ion pairs vary in their strength ranging from weak to moderately strong. In addition to these hydrogen bonds, there are other dispersion and electrostatic-dominant interactions that play an important role in the overall stability of PILs and their physicochemical properties. Aided by results from our previous DFT studies of triethanolammonium class of PILs with inorganic anions, these new data allow us to gain an improved understanding of the structure-property relationships in the studied ionic liquids. Close to linear correlation, in particular, has been found between the melting points and the binding energies of the cation and anion in the ion pairs.
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Affiliation(s)
- Irina V Fedorova
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences , 1 Akademicheskaya Street , Ivanovo 153045 , Russia
| | - Lyubov P Safonova
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences , 1 Akademicheskaya Street , Ivanovo 153045 , Russia
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20
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Sosnowska A, Brzeski J, Skurski P, Puzyn T. The Acid Strength of the Lewis-Brønsted Superacids - A QSPR Study. Mol Inform 2019; 38:e1800113. [PMID: 30747480 DOI: 10.1002/minf.201800113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/14/2019] [Indexed: 11/12/2022]
Abstract
The acidity of Lewis-Brønsted superacids can be derived from the theoretical calculations as the Gibbs free energy of the deprotonation reaction (ΔGacid ), which describes the tendency of a studied compound to donate a proton. This paper presents the first Quantitative Structure - Property Relationship (QSPR) model that correlates the ΔGacid of superacid (HF/MeX3 formula (X=F, Cl, Br)) with their structure. Developed model is well fitted, roubustness, has good predictive abilities, fulfills all OECD recommendation for good model. Obtained results provide the insight into the relation of structural features of superacids, which are responsible for their acid strength - the structures characterized by strong F-Me dative bond (with relatively large vibrational frequency), small positive partial atomic charge on Me central atom, possibly large polarity exhibit large acid strength. Such assumption can be used in the future as valuable information in the process of the designing new, stronger, more effective superacids.
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Affiliation(s)
- Anita Sosnowska
- Laboratory of Environmental Chemometrics, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
| | - Jakub Brzeski
- Laboratory of Quantum Chemistry, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
| | - Piotr Skurski
- Laboratory of Quantum Chemistry, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
| | - Tomasz Puzyn
- Laboratory of Environmental Chemometrics, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
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21
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Brzeski J, Skurski P. The acid strength of the HF/AlX3 Lewis-Brønsted complexes involving various electron acceptors as ligands. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.12.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Fedorova IV, Safonova LP. Ab Initio Investigation of the Interionic Interactions in Triethylammonium-Based Protic Ionic Liquids: The Role of Anions in the Formation of Ion Pair and Hydrogen Bonded Structure. J Phys Chem A 2018; 123:293-300. [DOI: 10.1021/acs.jpca.8b10906] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Irina V. Fedorova
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Street, Ivanovo 153045, Russia
| | - Lyubov P. Safonova
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Street, Ivanovo 153045, Russia
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23
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Triethylammonium-based protic ionic liquids with sulfonic acids: Phase behavior and electrochemistry. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.06.059] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Rybacka O, Brzeski J, Anusiewicz I, Skurski P. The acid strength of the datively bound complexes involving AlF3 lone pair acceptor and various lone pair donors. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.06.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Levanov AV, Isaikina OY, Gurbanova UD, Lunin VV. Dissociation Constants of Perchloric and Sulfuric Acids in Aqueous Solution. J Phys Chem B 2018; 122:6277-6286. [DOI: 10.1021/acs.jpcb.8b01947] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander V. Levanov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskiye Gory 1, building 3, 119991 Moscow, Russia
| | - Oksana Ya. Isaikina
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskiye Gory 1, building 3, 119991 Moscow, Russia
| | - Ulkar D. Gurbanova
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskiye Gory 1, building 3, 119991 Moscow, Russia
| | - Valery V. Lunin
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskiye Gory 1, building 3, 119991 Moscow, Russia
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26
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Brzeski J, Anusiewicz I, Skurski P. The acid strength of the HClO4/n(AlF3) and HClO4/n(SbF5) (n = 1–3) Lewis–Brønsted superacids containing the excess of the Lewis acid component. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2235-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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27
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Gruzdev M, Shmukler L, Kudryakova N, Kolker A, Sergeeva Y, Safonova L. Triethanolamine-based protic ionic liquids with various sulfonic acids: Synthesis and properties. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.07.078] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Kozlov VA, Ivanov SN, Koifman OI. Solvated proton as the main reagent and a catalyst in the single-stage aromatic sulfonation and protodesulfonation of sulfonic acids. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3715] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vladimir A. Kozlov
- Department of Chemistry and Technology of Macromolecular Compounds; Ivanovo State University of Chemistry and Technology; Ivanovo Russia
| | - Sergey N. Ivanov
- Department of Organic and Physical Chemistry; Ivanovo State University; Ivanovo Russia
| | - Oskar I. Koifman
- Department of Chemistry and Technology of Macromolecular Compounds; Ivanovo State University of Chemistry and Technology; Ivanovo Russia
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29
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30
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Feng R, Vasiliu M, Peterson KA, Dixon DA. Acidity of M(VI)O2(OH)2 for M = Group 6, 16, and U as Central Atoms. J Phys Chem A 2017; 121:1041-1050. [DOI: 10.1021/acs.jpca.6b11889] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rulin Feng
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - Monica Vasiliu
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Kirk A. Peterson
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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31
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Srivastava AK, Kumar A, Misra N. Superhalogens as building blocks of a new series of superacids. NEW J CHEM 2017. [DOI: 10.1039/c7nj00129k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A new series of superacids by the protonation of BnH3n+1− superhalogen anions has been proposed. The resulting BnH3n+2 species behave as superacids for n ≥ 2 due to their smaller free energy of deprotonation than that of H2SO4. These BnH3n+2 superacids do not require Brønsted/Lewis acid components.
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Affiliation(s)
| | | | - Neeraj Misra
- Department of Physics
- University of Lucknow
- Lucknow
- India
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32
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Kelley SP, McCrary PD, Flores L, Garner EB, Dixon DA, Rogers RD. Structural and Theoretical Study of Salts of the [B 9 H 14 ] - Ion: Isolation of Multiple Isomers and Implications for Energy Storage. Chempluschem 2016; 81:922-925. [PMID: 31968808 DOI: 10.1002/cplu.201600270] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Indexed: 11/06/2022]
Abstract
Boranes and boron hydrides are well known for their novel molecular structures and useful chemical reactivity, with [B9 H14 ]- notable in particular for its ease of isolation, unusual structure, and tautomerization. We report an experimental and theoretical investigation of the structure of [B9 H14 ]- and the energetics of some of its reactions. Salts of [B9 H14 ]- with 1-ethyl-3-methylimidazolium and N-butyl-N-methylpyrrolidinium were characterized by single-crystal X-ray diffraction and demonstrate the stabilization of an isomer of [B9 H14 ]- not previously observed in the solid state. Heats of formation and acid dissociation constants of [B9 H14 ]- and closely related structures were calculated. The results suggest a mechanism for particularly energetic hypergolic ignition induced by protonation and suggest potential for reversible H2 storage. These results encourage further investigation of [B9 H14 ]- as an energy-storage medium in ionic systems.
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Affiliation(s)
- Steven P Kelley
- Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
| | - Parker D McCrary
- Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
| | - Luis Flores
- Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
| | - Edward B Garner
- Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
| | - Robin D Rogers
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC, H3A 0B8, Canada.,Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
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33
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Calculated bond dissociation energies and enthalpy of formation of α-amino acid radicals. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1975-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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34
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Trummal A, Lipping L, Kaljurand I, Koppel IA, Leito I. Acidity of Strong Acids in Water and Dimethyl Sulfoxide. J Phys Chem A 2016; 120:3663-9. [DOI: 10.1021/acs.jpca.6b02253] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aleksander Trummal
- National Institute of Chemical Physics and Biophysics, 23 Akadeemia tee, Tallinn 12618, Estonia
| | - Lauri Lipping
- Institute
of Chemistry, University of Tartu, 14a Ravila Street, Tartu 50411, Estonia
| | - Ivari Kaljurand
- Institute
of Chemistry, University of Tartu, 14a Ravila Street, Tartu 50411, Estonia
| | - Ilmar A. Koppel
- Institute
of Chemistry, University of Tartu, 14a Ravila Street, Tartu 50411, Estonia
| | - Ivo Leito
- Institute
of Chemistry, University of Tartu, 14a Ravila Street, Tartu 50411, Estonia
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35
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Davidowski SK, Thompson F, Huang W, Hasani M, Amin SA, Angell CA, Yarger JL. NMR Characterization of Ionicity and Transport Properties for a Series of Diethylmethylamine Based Protic Ionic Liquids. J Phys Chem B 2016; 120:4279-85. [DOI: 10.1021/acs.jpcb.6b01203] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen K. Davidowski
- School of Molecular Sciences
and the Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Forrest Thompson
- School of Molecular Sciences
and the Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Wei Huang
- School of Molecular Sciences
and the Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Mohammad Hasani
- School of Molecular Sciences
and the Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Samrat A. Amin
- School of Molecular Sciences
and the Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - C. Austen Angell
- School of Molecular Sciences
and the Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Jeffery L. Yarger
- School of Molecular Sciences
and the Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
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36
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Czapla M, Anusiewicz I, Skurski P. Does the protonation of superhalogen anions always lead to superacids? Chem Phys 2016. [DOI: 10.1016/j.chemphys.2015.12.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Czapla M, Anusiewicz I, Skurski P. The saturation of the gas phase acidity of nHF/AlF3 and nHF/GeF4 (n = 1–6) superacids caused by increasing the number of surrounding HF molecules. RSC Adv 2016. [DOI: 10.1039/c6ra02199a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The acidic strength of selected Brønsted/Lewis superacids is evaluated on the basis of theoretical calculations carried out at the QCISD/6-311++G(d,p) level.
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Affiliation(s)
- Marcin Czapla
- Laboratory of Quantum Chemistry
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | - Iwona Anusiewicz
- Laboratory of Quantum Chemistry
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | - Piotr Skurski
- Laboratory of Quantum Chemistry
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
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38
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Czapla M, Skurski P. Strength of the Lewis–Brønsted Superacids Containing In, Sn, and Sb and the Electron Binding Energies of Their Corresponding Superhalogen Anions. J Phys Chem A 2015; 119:12868-75. [DOI: 10.1021/acs.jpca.5b10205] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marcin Czapla
- Laboratory
of Quantum Chemistry,
Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Piotr Skurski
- Laboratory
of Quantum Chemistry,
Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
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39
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Stover ML, Plummer CE, Miller SR, Cassady CJ, Dixon DA. Gas-Phase Acidities of Phosphorylated Amino Acids. J Phys Chem B 2015; 119:14604-21. [DOI: 10.1021/acs.jpcb.5b08616] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michele L. Stover
- Chemistry
Department, Shelby
Hall, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Chelsea E. Plummer
- Chemistry
Department, Shelby
Hall, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Sean R. Miller
- Chemistry
Department, Shelby
Hall, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Carolyn J. Cassady
- Chemistry
Department, Shelby
Hall, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Chemistry
Department, Shelby
Hall, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
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40
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Yanai H. Chemistry of Fluorinated Carbon Acids: Synthesis, Physicochemical Properties, and Catalysis. Chem Pharm Bull (Tokyo) 2015; 63:649-62. [PMID: 26329858 DOI: 10.1248/cpb.c15-00487] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The bis[(trifluoromethyl)sulfonyl]methyl (Tf2CH; Tf=SO2CF3) group is known to be one of the strongest carbon acid functionalities. The acidity of such carbon acids in the gas phase is stronger than that of sulfuric acid. Our recent investigations have demonstrated that this type of carbon acids work as novel acid catalysts. In this paper, recent achievements in carbon acid chemistry by our research group, including synthesis, physicochemical properties, and catalysis, are summarized.
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Affiliation(s)
- Hikaru Yanai
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
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41
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Plummer CE, Stover ML, Bokatzian SS, Davis JTM, Dixon DA, Cassady CJ. An Experimental and Computational Study of the Gas-Phase Acidities of the Common Amino Acid Amides. J Phys Chem B 2015. [PMID: 26196065 DOI: 10.1021/acs.jpcb.5b04486] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using proton-transfer reactions in a Fourier transform ion cyclotron resonance mass spectrometer and correlated molecular orbital theory at the G3(MP2) level, gas-phase acidities (GAs) and the associated structures for amides corresponding to the common amino acids have been determined for the first time. These values are important because amino acid amides are models for residues in peptides and proteins. For compounds whose most acidic site is the C-terminal amide nitrogen, two ions populations were observed experimentally with GAs that differ by 4-7 kcal/mol. The lower energy, more acidic structure accounts for the majority of the ions formed by electrospray ionization. G3(MP2) calculations predict that the lowest energy anionic conformer has a cis-like orientation of the [-C(═O)NH](-) group whereas the higher energy, less acidic conformer has a trans-like orientation of this group. These two distinct conformers were predicted for compounds with aliphatic, amide, basic, hydroxyl, and thioether side chains. For the most acidic amino acid amides (tyrosine, cysteine, tryptophan, histidine, aspartic acid, and glutamic acid amides) only one conformer was observed experimentally, and its experimental GA correlates with the theoretical GA related to side chain deprotonation.
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Affiliation(s)
- Chelsea E Plummer
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Michele L Stover
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Samantha S Bokatzian
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - John T M Davis
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Carolyn J Cassady
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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42
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43
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Abstract
Nanoscale metal fluorides and hydroxide fluorides prepared according the fluorolytic sol–gel synthesis represent a powerful class of bi-acidic heterogeneous catalysts.
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Affiliation(s)
- Erhard Kemnitz
- Department für Chemie
- Humboldt-Universität zu Berlin
- D-12489 Berlin
- Germany
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44
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Bokatzian SS, Stover ML, Plummer CE, Dixon DA, Cassady CJ. An Experimental and Computational Investigation into the Gas-Phase Acidities of Tyrosine and Phenylalanine: Three Structures for Deprotonated Tyrosine. J Phys Chem B 2014; 118:12630-43. [DOI: 10.1021/jp510037c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samantha S. Bokatzian
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Michele L. Stover
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Chelsea E. Plummer
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Carolyn J. Cassady
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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Beichel W, Panzer JMU, Hätty J, Ye X, Himmel D, Krossing I. Straightforward Synthesis of the Brønsted Acid hfipOSO 3H and its Application for the Synthesis of Protic Ionic Liquids. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Beichel W, Panzer JMU, Hätty J, Ye X, Himmel D, Krossing I. Straightforward Synthesis of the Brønsted Acid hfipOSO3H and its Application for the Synthesis of Protic Ionic Liquids. Angew Chem Int Ed Engl 2014; 53:6637-40. [DOI: 10.1002/anie.201402577] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Indexed: 11/06/2022]
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47
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Yang C, Xue XS, Li X, Cheng JP. Computational Study on the Acidic Constants of Chiral Brønsted Acids in Dimethyl Sulfoxide. J Org Chem 2014; 79:4340-51. [DOI: 10.1021/jo500158e] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Chen Yang
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, and Collaborative Innovation Center
of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Xiao-Song Xue
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, and Collaborative Innovation Center
of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Xin Li
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, and Collaborative Innovation Center
of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Jin-Pei Cheng
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, and Collaborative Innovation Center
of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
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Ivanov SN, Giricheva NI, Nurkevich TV, Fedorov MS. Energies of the gas-phase deprotonation of nitro-substituted benzenesulfonic and benzoic acids: The role of the conformation isomerism of sulfonic acids. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2014. [DOI: 10.1134/s0036024414040104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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49
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Hilal SH, Saravanaraj AN, Carreira LA. Development of Monopole Interaction Models for Ionic Compounds. Part I: Estimation of Aqueous Henry's Law Constants for Ions and Gas Phase pKa Values for Acidic Compounds. Mol Inform 2014; 33:92-103. [PMID: 27485566 DOI: 10.1002/minf.201300092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 09/26/2013] [Indexed: 11/09/2022]
Abstract
The SPARC (SPARC Performs Automated Reasoning in Chemistry) physicochemical mechanistic models for neutral compounds have been extended to estimate Henry's Law Constant (HLC) for charged species by incorporating ionic electrostatic interaction models. Combinations of absolute aqueous pKa values, relative pKa values in the gas phase, and aqueous HLC for neutral compounds have been used to develop monopole interaction models that quantify the energy differences upon moving an ionic solute molecule from the gas phase to the liquid phase. Inter-molecular interaction energies were factored into mechanistic contributions of monopoles with polarizability, dipole, H-bonding, and resonance. The monopole ionic models were validated by a wide range of measured gas phase pKa data for 450 acidic compounds. The RMS deviation error and R(2) for the OH, SH, CO2 H, CH3 and NR2 acidic reaction centers (C) were 16.9 kcal/mol and 0.87, respectively. The calculated HLCs of ions were compared to the HLCs of 142 ions calculated by quantum mechanics. Effects of inter-molecular interaction of the monopoles with polarizability, dipole, H-bonding, and resonance on acidity of the solutes in the gas phase are discussed.
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Affiliation(s)
- S H Hilal
- Ecosystems Research Division, National Exposure Research Laboratory, U.S. Environmental Protection Agency, Athens, GA 30605 phone: 706-355-8210.
| | - A N Saravanaraj
- Department of Chemistry, University of Georgia, Athens, GA 30602
| | - L A Carreira
- Department of Chemistry, University of Georgia, Athens, GA 30602
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50
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Rousseau R, Dixon DA, Kay BD, Dohnálek Z. Dehydration, dehydrogenation, and condensation of alcohols on supported oxide catalysts based on cyclic (WO3)3 and (MoO3)3 clusters. Chem Soc Rev 2014; 43:7664-80. [DOI: 10.1039/c3cs60445d] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The review summarizes recent synthesis and reactivity studies of model oxide catalysts prepared by the deposition of gas phase cyclic (WO3)3 and (MoO3)3 clusters.
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Affiliation(s)
- Roger Rousseau
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
| | - David A. Dixon
- Department of Chemistry
- The University of Alabama
- Tuscaloosa, USA
| | - Bruce D. Kay
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
| | - Zdenek Dohnálek
- Fundamental and Computational Sciences Directorate and Institute for Integrated Catalysis
- Pacific Northwest National Laboratory
- Richland, USA
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