1
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Guo M, Yi Q, Cui C, Gan W, Luo Z. Gas-Phase Synthesis of Metal Olefins: Plasma-Assisted Methane Dehydrogenation and C═C Bond Formation. J Phys Chem A 2022; 126:1123-1131. [PMID: 35166550 DOI: 10.1021/acs.jpca.1c10012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Methane dehydrogenation and C-C coupling under mild conditions are very important but challenging in chemistry. Utilizing a customized time of flight mass spectrometer combined with a magnetron sputtering (MagS) cluster source, here, we have conducted a study on the reactions of methane with small silver and copper clusters simply by introducing methane in argon as the working gas for sputtering. Interestingly, a series of [M(CnH2n)]+ (M = Cu and Ag; n = 2-12) clusters were observed, indicating high-efficiency methane dehydrogenation in such a plasma-assisted chamber system. Density functional theory calculations find the lowest energy structures of the [M(CnH2n)]+ series pertaining to olefins indicative of both C-H bond activation of methane and C-C bond coupling. We analyzed the interactions involved in the [Cu(CnH2n)]+ and [Ag(CnH2n)]+ (n = 1-6) clusters and demonstrated the reaction coordinates for the "Cu+ + CH4" and "Ag+ + CH4." It is illustrated that the presence of a second methane molecule enables us to reduce the necessary energy of dehydrogenation, which concurs with the experimental observation of an absence of the metal carbine products Cu+CH2 and Ag+CH2, which are short-lived. Also, it is elucidated that the higher-lying excitation states of Cu+ and Ag+ ions enable more favorable dehydrogenation process and C═C bond formation, shedding light on the plasma assistance of the essence.
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Affiliation(s)
- Mengdi Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, China.,School of Chemical Science, University of Chinese Academy of Sciences, Beijing100049, China
| | - Qiuhao Yi
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, China.,School of Chemical Science, University of Chinese Academy of Sciences, Beijing100049, China
| | - Chaonan Cui
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, China
| | - Wen Gan
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, China.,School of Chemical Science, University of Chinese Academy of Sciences, Beijing100049, China
| | - Zhixun Luo
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, China.,School of Chemical Science, University of Chinese Academy of Sciences, Beijing100049, China
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2
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Lu SJ, Xu XL, Xu HG, Zheng WJ. Structures and bonding properties of CPt 2 -/0 and CPt 2H -/0: Anion photoelectron spectroscopy and quantum chemical calculations. J Chem Phys 2019; 151:224303. [PMID: 31837696 DOI: 10.1063/1.5130589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We present a combined anion photoelectron spectroscopic and quantum chemical investigation on the structures and bonding properties of CPt2 -/0 and CPt2H-/0. The experimental vertical detachment energies of CPt2 - and CPt2H- are measured to be 1.91 ± 0.08 and 3.54 ± 0.08 eV, respectively. CPt2 - is identified as a C2v symmetric Pt-C-Pt bent structure, and CPt2 has a D∞h symmetric Pt-C-Pt linear structure. Both anionic and neutral CPt2H adopt a Pt-C-Pt-H chain-shaped structure, in which the ∠PtCPt and ∠CPtH bond angles of CPt2H- are larger than those of CPt2H. The Pt-C bonds in CPt2 -/0 and CPt2H-/0 exhibit covalent double bonding characters. The Pt=C bonds are much stronger than the C-H bond that may explain why the C atom CPt2H-/0 prefers to form Pt=C bonds rather than C-H bonds. It may also explain why platinum can insert into the C-H bond to activate the C-H bond as reported in the literature.
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Affiliation(s)
- Sheng-Jie Lu
- Department of Chemistry and Chemical Engineering, Heze University, Heze, Shandong 274015, China
| | - Xi-Ling Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hong-Guang Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei-Jun Zheng
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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3
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Lu F, Li L, Zhang X, Nie Y, Geng Z. Enhancement of the Catalytic Activities of Heteronuclear Bimetallic Cations for the C-H Bond Activation of Cyclohexane. J Phys Chem A 2019; 123:10397-10405. [PMID: 31693370 DOI: 10.1021/acs.jpca.9b05715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Heterometallic cations NiCu+ and CoNi+ can easily induce triple dehydrogenation of cyclohexane with high yield, and monometallic cations Ni+ and Co+ only give rise to double dehydrogenation with low yield. Reaction mechanisms of the six C-H bond activations for cyclohexane are systematically investigated by comparing the difference between bimetallic cations and monometallic ones. Fragment molecular orbital analysis clearly indicates that charge transfer (CT) occurs from the occupied interacting orbital of the metallic cation to the σ*-antibonding orbital of the first, third, and fifth activated C-H bonds in transition states. The synergistic effects of heteronuclear bimetallic cations result in the destabilization of the occupied interacting orbital in bimetallic cations, which raise the reactivity of bimetallic cations and enhance the CT between catalysts and substrates. Contrary to the absence of the third dehydrogenation product in the mononuclear metallic cation catalytic reaction, a significant amount of the third dehydrogenation product is observed in the presence of heteronuclear cations (NiCu+ and CoNi+). π back-bonding between Ni of heteronuclear metallic cations and the substrate cyclohexadiene plays an essential role in lowering the energies of transition states, which accelerate the third dehydrogenation. The reasons why heteronuclear bimetallic cations are more reactive than monometallic ones are discussed in detail.
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Affiliation(s)
- Feng Lu
- Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education , Northwest Normal University , Lanzhou , Gansu 730070 , P. R. China.,Department of Metallurgical and Chemical Engineering , Gansu Vocational & Technical College of Nonferrous Metallurgy , Jinchang , Gansu 737100 , P. R. China
| | - Li Li
- Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education , Northwest Normal University , Lanzhou , Gansu 730070 , P. R. China.,Department of Metallurgical and Chemical Engineering , Gansu Vocational & Technical College of Nonferrous Metallurgy , Jinchang , Gansu 737100 , P. R. China
| | - Xiaoxia Zhang
- Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education , Northwest Normal University , Lanzhou , Gansu 730070 , P. R. China
| | - Yuxiu Nie
- Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education , Northwest Normal University , Lanzhou , Gansu 730070 , P. R. China
| | - Zhiyuan Geng
- Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education , Northwest Normal University , Lanzhou , Gansu 730070 , P. R. China
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4
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Hirabayashi S, Ichihashi M. Dehydrogenation of Methane by Partially Oxidized Tungsten Cluster Cations: High Reactivity Comparable to That of Platinum Cluster Cations. J Phys Chem A 2019; 123:6840-6847. [DOI: 10.1021/acs.jpca.9b04606] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
| | - Masahiko Ichihashi
- Cluster Research Laboratory, Toyota Technological Institute: in East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan
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5
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Haddadi E, Nabavizadeh SM, Hosseini FN. Computational study of the C I bimetallic oxidative addition at Pt M (M = Ni, Pd and Pt) reaction centers. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.02.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Ferrari P, Hansen K, Lievens P, Janssens E. Stability of small cationic platinum clusters. Phys Chem Chem Phys 2018; 20:29085-29090. [DOI: 10.1039/c8cp06092d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The relative stability of small cationic platinum clusters is investigated by photofragmentation experiments and density functional theory calculations.
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Affiliation(s)
- Piero Ferrari
- Laboratory of Solid State Physics and Magnetism
- KU Leuven
- 3001 Leuven
- Belgium
| | - Klavs Hansen
- Center for Joint Quantum Studies and Department of Physics
- Tianjin University
- 300072 Tianjin
- China
- Department of Physics
| | - Peter Lievens
- Laboratory of Solid State Physics and Magnetism
- KU Leuven
- 3001 Leuven
- Belgium
| | - Ewald Janssens
- Laboratory of Solid State Physics and Magnetism
- KU Leuven
- 3001 Leuven
- Belgium
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7
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Theoretical study on the H2S activation by PtCH2 + in the gas phase. Struct Chem 2016. [DOI: 10.1007/s11224-016-0756-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Pelegrini M, Parreira RLT, Ferrão LFA, Caramori GF, Ortolan AO, da Silva EH, Roberto-Neto O, Rocco JAFF, Machado FBC. Hydrazine decomposition on a small platinum cluster: the role of N2H5 intermediate. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1816-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Wang R, Ran J, Qi W, Niu J, Du X. A comparison of methane activation on catalysts Pt 2 and PtNi. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.08.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Niroomand Hosseini F. Theoretical studies of methyl iodide oxidative addition to adjacent metal centers in diplatinum(II) complexes. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Schwarz H. How and Why Do Cluster Size, Charge State, and Ligands Affect the Course of Metal-Mediated Gas-Phase Activation of Methane? Isr J Chem 2014. [DOI: 10.1002/ijch.201300134] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Harding DJ, Fielicke A. Platinum Group Metal Clusters: From Gas-Phase Structures and Reactivities towards Model Catalysts. Chemistry 2014; 20:3258-67. [DOI: 10.1002/chem.201304586] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Ju TY, Yang HQ, Li FM, Li XY, Hu CW. Reaction mechanism on the activation of ethane C–H and C–C bonds by a diplatinum cluster. Theor Chem Acc 2013. [DOI: 10.1007/s00214-013-1387-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Density functional theory studies on the mechanism of activation of methane by homonuclear bimetallic Ni–Ni. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.07.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Li Q, Chen XY, Qiu YX, Wang SG. Investigation of spin-flip reactions of Zr + CH3CN by relativistic density functional theory. J Phys Chem A 2012; 116:5019-25. [PMID: 22578173 DOI: 10.1021/jp211975e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To explore the details of the reaction mechanisms of Zr atoms with acetonitrile molecules, the triplet and singlet spin-state potential energy surfaces have been investigated. Density functional theory (DFT) with the relativistic zero-order regular approximation at the PW91/TZ2P level has been applied. The complicated minimum energy reaction path involves four transition states (TS), stationary states 1-5 and one spin inversion (indicated by ⇒): (3)Zr + NCCH(3) → (3)Zr-η(1)-NCCH(3) ((3)1) → (3)TS(1/2) → (3)Zr-η(2)-(NC)CH(3) ((3)2) → (3)TS(2/3) → (3)ZrH-η(3)-(NCCH(2)) ((3)3) → (3)TS(3/4) → CNZrCH(3) ((3)4) ⇒ (1)TS(4/5) → CN(ZrH)CH(2) ((1)5). The minimum energy crossing point was determined with the help of the DFT fractional-occupation-number approach. The spin inversion leading from the triplet to the singlet state facilitates the activation of a C-H bond, lowering the rearrangement-barrier by 78 kJ/mol. The overall reaction is calculated to be exothermic by about 296 kJ/mol. All intermediate and product species were frequency and NBO analyzed. The species can be rationalized with the help of Lewis type formulas.
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Affiliation(s)
- Qiang Li
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China
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16
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Li Q, Qiu YX, Chen XY, Schwarz WHE, Wang SG. Investigation of spin-flip reactions of Nb + CH3CN by relativistic density functional theory. Phys Chem Chem Phys 2012; 14:6833-41. [PMID: 22499228 DOI: 10.1039/c2cp23225a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to explore the details of the reaction mechanisms of Nb atoms with acetonitrile molecules, the sextet, quartet, and doublet spin state potential energy surfaces have been investigated. Density functional theory (DFT) with the relativistic zero-order regular approximation at the PW91/TZ2P level has been applied. The complicated minimum energy reaction path involves four transition states (TS), stationary states (1) to (5) and two intersystem crossings from spin sextets to quartets to doublets (indicated by ⇒): (6)Nb + NCCH3→(6)Nb η(1)-NCCH3 ((6)1) →(6)TS1/2⇒(4)Nb η(2)-(NC)CH3 ((4)2) →(4)TS2/3→(4)NbH η(3)-(NCCH2) ((4)3) →(4)TS3/4→ CNNbCH3 ((4)4) ⇒(2)TS4/5→ CN(NbH)CH2 ((2)5). The minimum energy crossing points were determined with the help of the DFT fractional-occupation-number approach. The first spin inversion leads from the sextet to an energetically low intermediate quartet ((4)2) with final insertion of Nb into the C-C bond. The second one from the quartet to the doublet state facilitates the activation of a C-H bond, lowering the rearrangement-barrier by 44 kJ mol(-1). The overall reaction is calculated to be exothermic by about 170-180 kJ mol(-1). All intermediate and product species were frequency and NBO analyzed. The species can be rationalized with the help of Lewis type formulas.
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Affiliation(s)
- Qiang Li
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China.
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17
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Reaction mechanisms for C–N bond coupling from IrAg+, CH4 and NH3: A density functional theory study. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.02.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Hou X, Geng Z, Wang Y, Liu S. The small metal cluster IrAu+ mediated C–N coupling: A density functional theory study. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Harding DJ, Kerpal C, Meijer G, Fielicke A. Aktiviertes Methan auf kleinen Platinclusterkationen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201107042] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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20
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Harding DJ, Kerpal C, Meijer G, Fielicke A. Activated Methane on Small Cationic Platinum Clusters. Angew Chem Int Ed Engl 2011; 51:817-9. [DOI: 10.1002/anie.201107042] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Indexed: 11/06/2022]
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21
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Isakov DR, Khrapkovskii GM, Shamov AG. The DFT quantum chemical study of formation of ethane from two molecules of methane on Pt4, Pt6 (with and without Al6O9 substrate), and Pt14 clusters. Russ Chem Bull 2011. [DOI: 10.1007/s11172-010-0375-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Hu X, Zhou Z, Lin Q, Wu Y, Zhang Z. High reactivity of metal-free nitrogen-doped carbon nanotube for the C–H activation. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.01.045] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Di Tommaso S, Tognetti V, Sicilia E, Adamo C, Russo N. Computational Study of Alkynes Insertion into Metal-Hydride Bonds Catalyzed by Bimetallic Complexes. Inorg Chem 2010; 49:9875-83. [DOI: 10.1021/ic100850f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefania Di Tommaso
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, UMR CNRS 7575 ENSCP Chimie ParisTech 11, rue P. et M. Curie F-75231, Paris Cedex 05, France
| | - Vincent Tognetti
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, UMR CNRS 7575 ENSCP Chimie ParisTech 11, rue P. et M. Curie F-75231, Paris Cedex 05, France
| | - Emilia Sicilia
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MURST, Università della Calabria, I-87030 Arcavacata di Rende, Italy
| | - Carlo Adamo
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, UMR CNRS 7575 ENSCP Chimie ParisTech 11, rue P. et M. Curie F-75231, Paris Cedex 05, France
| | - Nino Russo
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MURST, Università della Calabria, I-87030 Arcavacata di Rende, Italy
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Roithová J, Schröder D. Selective activation of alkanes by gas-phase metal ions. Chem Rev 2010; 110:1170-211. [PMID: 20041696 DOI: 10.1021/cr900183p] [Citation(s) in RCA: 377] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jana Roithová
- Department of Organic Chemistry, Charles University in Prague, Faculty of Sciences, Hlavova 8, 12843 Prague 2, Czech Republic.
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25
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Thayer JS. Relativistic Effects and the Chemistry of the Heavier Main Group Elements. CHALLENGES AND ADVANCES IN COMPUTATIONAL CHEMISTRY AND PHYSICS 2010. [DOI: 10.1007/978-1-4020-9975-5_2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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26
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27
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Ončák M, Cao Y, Höckendorf R, Beyer M, Zahradník R, Schwarz H. Thermal NH Bond Activation on Anionic and Cationic Platinum Clusters: Non-Predetermined Reaction Pathways Indicate Transitions to a Bulk Surface Reactivity. Chemistry 2009; 15:8465-8474. [DOI: 10.1002/chem.200900677] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Parreira RLT, Caramori GF, Galembeck SE, Huguenin F. The Nature of the Interactions between Pt4 Cluster and the Adsorbates ·H, ·OH, and H2O. J Phys Chem A 2008; 112:11731-43. [DOI: 10.1021/jp8033177] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Renato L. T. Parreira
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil, and Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Avenida Prof. Lineu Prestes 748, Bl. 05 sup. Sl 555, Butantã, 05508-000, São Paulo, SP, Brazil
| | - Giovanni F. Caramori
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil, and Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Avenida Prof. Lineu Prestes 748, Bl. 05 sup. Sl 555, Butantã, 05508-000, São Paulo, SP, Brazil
| | - Sérgio E. Galembeck
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil, and Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Avenida Prof. Lineu Prestes 748, Bl. 05 sup. Sl 555, Butantã, 05508-000, São Paulo, SP, Brazil
| | - Fritz Huguenin
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil, and Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Avenida Prof. Lineu Prestes 748, Bl. 05 sup. Sl 555, Butantã, 05508-000, São Paulo, SP, Brazil
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30
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Gas-phase reactivities of charged platinum dimers with ammonia: A combined experimental/theoretical study. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2007.11.059] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Xia F, Cao Z. Reaction Mechanisms for C−O Bond Coupling from Pt4CH2+ and O2: A Relativistic Density Functional Study. Organometallics 2007. [DOI: 10.1021/om700288a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Fei Xia
- Department of Chemistry and State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
| | - Zexing Cao
- Department of Chemistry and State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
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32
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Schlangen M, Schröder D, Schwarz H. Pronounced ligand effects and the role of formal oxidation states in the nickel-mediated thermal activation of methane. Angew Chem Int Ed Engl 2007; 46:1641-4. [PMID: 17262870 DOI: 10.1002/anie.200603266] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria Schlangen
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
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Schlangen M, Schröder D, Schwarz H. Thermische Aktivierung von Methan durch kationische Nickelkomplexe: Einfluss von Liganden und formaler Oxidationsstufe. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603266] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Xiao L, Wang L. Methane Activation on Pt and Pt4: A Density Functional Theory Study. J Phys Chem B 2007; 111:1657-63. [PMID: 17266353 DOI: 10.1021/jp065288e] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The activation mechanisms of a methane molecule on a Pt atom (CH4-Pt) and on a Pt tetramer (CH4-Pt4) were investigated using density functional theory (B3LYP and PW91) calculations. The results from these two functionals are different mostly in predicting the reaction barrier, in particular for the CH4-Pt system. A new lower energy pathway was identified for the CH4 dehydrogenation on a Pt atom. In the new pathway, the PtCH2 + H2 products were formed via a transition state, in which the Pt atom forms a complex with carbene and both dissociated hydrogen atoms. We report here the first theoretical study of methane activation on a Pt4 cluster. Among the five single steps toward dehydrogenation, our results show that the rate-limiting step is the third step, that is, breaking the second C-H bond, which requires overcoming an energy barrier of 28 kcal/mol. On the other hand, the cleavage of the first C-H bond, that is, the first reaction step, requires overcoming an energy barrier of 4 kcal/mol.
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Affiliation(s)
- Li Xiao
- Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901, USA
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