1
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Mishra D, LaForge AC, Gorman LM, Díaz-Tendero S, Martín F, Berrah N. Direct tracking of H 2 roaming reaction in real time. Nat Commun 2024; 15:6656. [PMID: 39107291 PMCID: PMC11303762 DOI: 10.1038/s41467-024-49671-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 06/14/2024] [Indexed: 08/10/2024] Open
Abstract
Roaming is an unconventional type of molecular reaction where fragments, instead of immediately dissociating, remain weakly bound due to long-range Coulombic interactions. Due to its prevalence and ability to form new molecular compounds, roaming is fundamental to photochemical reactions in small molecules. However, the neutral character of the roaming fragment and its indeterminate trajectory make it difficult to identify experimentally. Here, we introduce an approach to image roaming, utilizing intense, femtosecond IR radiation combined with Coulomb explosion imaging to directly reconstruct the momentum vector of the neutral roaming H2, a precursor toH 3 + formation, in acetonitrile, CH3CN. This technique provides a kinematically complete picture of the underlying molecular dynamics and yields an unambiguous experimental signature of roaming. We corroborate these findings with quantum chemistry calculations, resolving this unique dissociative process.
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Affiliation(s)
| | - Aaron C LaForge
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA.
| | - Lauren M Gorman
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049, Madrid, Spain
| | - Nora Berrah
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
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2
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Severt T, Weckwerth E, Kaderiya B, Feizollah P, Jochim B, Borne K, Ziaee F, P KR, Carnes KD, Dantus M, Rolles D, Rudenko A, Wells E, Ben-Itzhak I. Initial-site characterization of hydrogen migration following strong-field double-ionization of ethanol. Nat Commun 2024; 15:74. [PMID: 38168047 PMCID: PMC10761976 DOI: 10.1038/s41467-023-44311-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 12/05/2023] [Indexed: 01/05/2024] Open
Abstract
An essential problem in photochemistry is understanding the coupling of electronic and nuclear dynamics in molecules, which manifests in processes such as hydrogen migration. Measurements of hydrogen migration in molecules that have more than two equivalent hydrogen sites, however, produce data that is difficult to compare with calculations because the initial hydrogen site is unknown. We demonstrate that coincidence ion-imaging measurements of a few deuterium-tagged isotopologues of ethanol can determine the contribution of each initial-site composition to hydrogen-rich fragments following strong-field double ionization. These site-specific probabilities produce benchmarks for calculations and answer outstanding questions about photofragmentation of ethanol dications; e.g., establishing that the central two hydrogen atoms are 15 times more likely to abstract the hydroxyl proton than a methyl-group proton to form H[Formula: see text] and that hydrogen scrambling, involving the exchange of hydrogen between different sites, is important in H2O+ formation. The technique extends to dynamic variables and could, in principle, be applied to larger non-cyclic hydrocarbons.
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Affiliation(s)
- Travis Severt
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Eleanor Weckwerth
- Department of Physics, Augustana University, Sioux Falls, SD, 57108, USA
| | - Balram Kaderiya
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Peyman Feizollah
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Bethany Jochim
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kurtis Borne
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Farzaneh Ziaee
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kanaka Raju P
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
- School of Quantum Technology, DIAT (DU), Pune, Maharashtra, 411025, India
| | - Kevin D Carnes
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Eric Wells
- Department of Physics, Augustana University, Sioux Falls, SD, 57108, USA.
| | - Itzik Ben-Itzhak
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA.
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3
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Kwon S, Sandhu S, Shaik M, Stamm J, Sandhu J, Das R, Hetherington CV, Levine BG, Dantus M. What is the Mechanism of H 3+ Formation from Cyclopropane? J Phys Chem A 2023; 127:8633-8638. [PMID: 37813385 DOI: 10.1021/acs.jpca.3c05442] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
We examine the possibility that three hydrogen atoms in one plane of the cyclopropane dication come together in a concerted "ring-closing" mechanism to form H3+, a crucial cation in interstellar gas-phase chemistry. Ultrafast strong-field ionization followed by disruptive probing measurements indicates that the formation time of H3+ is 249 ± 16 fs. This time scale is not consistent with a concerted mechanism, but rather a process that is preceded by ring opening. Measurements on propene, an isomer of cyclopropane, reveal the H3+ formation time to be 225 ± 13 fs, a time scale similar to the H3+ formation time in cyclopropane. Ab initio molecular dynamics simulations and the fact that both dications share a common potential energy surface support the ring-opening mechanism. The reaction mechanism following double ionization of cyclopropane involves ring opening, then H-migration, and roaming of a neutral H2 molecule, which then abstracts a proton to form H3+. These results further our understanding of complex interstellar chemical reactions and gas-phase reaction dynamics relevant to electron ionization mass spectrometry.
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Affiliation(s)
- Sung Kwon
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Shawn Sandhu
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Moaid Shaik
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Jacob Stamm
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Jesse Sandhu
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Rituparna Das
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Caitlin V Hetherington
- Department of Chemistry and Institute of Advanced Computational Science, Stony Brook University, Stony Brook, New York 11794, United States
| | - Benjamin G Levine
- Department of Chemistry and Institute of Advanced Computational Science, Stony Brook University, Stony Brook, New York 11794, United States
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
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4
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Zhou L, Ni H, Jiang Z, Qiang J, Jiang W, Zhang W, Lu P, Wen J, Lin K, Zhu M, Dörner R, Wu J. Ultrafast formation dynamics of D 3+ from the light-driven bimolecular reaction of the D 2-D 2 dimer. Nat Chem 2023; 15:1229-1235. [PMID: 37264104 DOI: 10.1038/s41557-023-01230-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 05/04/2023] [Indexed: 06/03/2023]
Abstract
The light-driven formation of trihydrogen cation has been attracting considerable attention because of its important role as an initiator of chemical reactions in interstellar clouds. To understand the formation dynamics, most previous studies focused on creating H3+ or D3+ from unimolecular reactions of various organic molecules. Here we observe and characterize the ultrafast formation dynamics of D3+ from a bimolecular reaction, using pump-probe experiments that employ ultrashort laser pulses to probe its formation from a D2-D2 dimer. Our molecular dynamics simulations provide an intuitive representation of the reaction dynamics, which agree well with the experimental observation. We also show that the emission direction of D3+ can be controlled using a tailored two-colour femtosecond laser field. The underlying control mechanism is in line with what is known from the light control of electron localization in the bond breaking of single molecules.
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Affiliation(s)
- Lianrong Zhou
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
| | - Hongcheng Ni
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
| | - Zhejun Jiang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
| | - Junjie Qiang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
| | - Wenyu Jiang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
| | - Wenbin Zhang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
| | - Peifen Lu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
| | - Jin Wen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China.
| | - Kang Lin
- Institut für Kernphysik, Goethe-Universität Frankfurt am Main, Frankfurt, Germany.
| | - Meifang Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Reinhard Dörner
- Institut für Kernphysik, Goethe-Universität Frankfurt am Main, Frankfurt, Germany
| | - Jian Wu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China.
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China.
- Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing, China.
- CAS Center for Excellence in Ultra-intense Laser Science, Shanghai, China.
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5
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Dantus M. Insights into ultrafast H 3+ formation provide a glimpse into primordial chemistry. Nat Chem 2023; 15:1202-1203. [PMID: 37640852 DOI: 10.1038/s41557-023-01298-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Affiliation(s)
- Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, MI, USA.
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA.
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6
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Mi Y, Wang E, Dube Z, Wang T, Naumov AY, Villeneuve DM, Corkum PB, Staudte A. D 3+ formation through photoionization of the molecular D 2-D 2 dimer. Nat Chem 2023; 15:1224-1228. [PMID: 37264105 DOI: 10.1038/s41557-023-01231-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 05/04/2023] [Indexed: 06/03/2023]
Abstract
The H2-H2 molecular dimer is of fundamental importance in the study of chemical interactions because of its unique bonding properties and its ability to model more complex systems. The trihydrogen cation H3+ is also a key intermediate in a range of chemical processes in interstellar environments, such as the formation of various organic molecules and early stars. However, the unexpected high abundance of H3+ in molecular clouds remains challenging to explain. Here using near-infrared, femtosecond laser pulses and coincidence momentum imaging, we find that the dominant channel after photoionization of a deuterium molecular dimer (D2-D2) is the ejection of a deuterium atom within a few hundred femtoseconds, leading to the formation of D3+. The formation mechanism is supported and well-reproduced by ab initio molecular dynamics simulations. This pathway of D3+ formation from ultracold D2-D2 gas may provide insights into the high abundance of H3+ in the interstellar medium.
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Affiliation(s)
- Yonghao Mi
- Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, Ottawa, Ontario, Canada.
| | - Enliang Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, China.
- Max-Planck-Institut für Kernphysik, Heidelberg, Germany.
| | - Zack Dube
- Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, Ottawa, Ontario, Canada
| | - Tian Wang
- Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, Ottawa, Ontario, Canada
| | - A Y Naumov
- Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, Ottawa, Ontario, Canada
| | - D M Villeneuve
- Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, Ottawa, Ontario, Canada
| | - P B Corkum
- Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, Ottawa, Ontario, Canada
| | - André Staudte
- Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, Ottawa, Ontario, Canada.
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7
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Gope K, Bittner DM, Strasser D. Sequential mechanism in H 3+ formation dynamics on the ethanol dication. Phys Chem Chem Phys 2023; 25:6979-6986. [PMID: 36804659 DOI: 10.1039/d2cp03632k] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Two- and three-body Coulomb explosion dynamics of isolated ethanol dications are studied via single-photon double-ionization with ultrafast extreme-ultraviolet pulses. The measured 3-body momentum correlations obtained via 3D coincidence imaging of the ionic products provide evidence for several concerted and sequential mechanisms: (1) a concerted 3-body breakup mechanism, with dominating channels such as CH3+ + COH+ + H2; (2) sequential dissociation in which the ejection of a low-kinetic-energy neutral OH precedes the Coulomb explosion of C2H52+ → CH3+ + CH2+; and (3) a sequential 3-body breakup mechanism that dominates H3+ formation from the ethanol dication via a mechanism that is different from the well-studied H3+ formation in the 2-body Coulomb explosion of the methanol dication. Furthermore, we report surprising branching ratios of the competing C-O bond dissociation channels, resulting in H3O+, H2O+ and OH+ formation.
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Affiliation(s)
- Krishnendu Gope
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
| | - Dror M Bittner
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
| | - Daniel Strasser
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
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8
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Gope K, Livshits E, Bittner DM, Baer R, Strasser D. An "inverse" harpoon mechanism. SCIENCE ADVANCES 2022; 8:eabq8084. [PMID: 36170355 PMCID: PMC9519053 DOI: 10.1126/sciadv.abq8084] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 08/15/2022] [Indexed: 05/21/2023]
Abstract
Electron-transfer reactions are ubiquitous in chemistry and biology. The electrons' quantum nature allows their transfer across long distances. For example, in the well-known harpoon mechanism, electron transfer results in Coulombic attraction between initially neutral reactants, leading to a marked increase in the reaction rate. Here, we present a different mechanism in which electron transfer from a neutral reactant to a multiply charged cation results in strong repulsion that encodes the electron-transfer distance in the kinetic energy release. Three-dimensional coincidence imaging allows to identify such "inverse" harpoon products, predicted by nonadiabatic molecular dynamics simulations to occur between H2 and HCOH2+ following double ionization of isolated methanol molecules. These dynamics are experimentally initiated by single-photon double ionization with ultrafast extreme ultraviolet pulses, produced by high-order harmonic generation. A detailed comparison of measured and simulated data indicates that while the relative probability of long-range electron-transfer events is correctly predicted, theory overestimates the electron-transfer distance.
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Affiliation(s)
- Krishnendu Gope
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Ester Livshits
- Fritz Haber Research Center for Molecular Dynamics and the Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Dror M. Bittner
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Roi Baer
- Fritz Haber Research Center for Molecular Dynamics and the Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
- Corresponding author. (R.B.); (D.S.)
| | - Daniel Strasser
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
- Corresponding author. (R.B.); (D.S.)
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9
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Bittner D, Gope K, Livshits E, Baer R, Strasser D. Sequential and concerted C-C and C-O bond dissociation in the Coulomb explosion of 2-propanol. J Chem Phys 2022; 157:074309. [DOI: 10.1063/5.0098531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the competing mechanisms in the Coulomb explosion of 2-propanol dication, formed by an ultrafast EUV pulse. Over 20 product channels are identified and characterized using 3D coincidence imaging of the ionic fragments. The momentum correlations in the three-body fragmentation channels provide evidence for a dominant sequential mechanism, starting with cleavage of a C-C bond, ejecting and cations, followed by a secondary fragmentation of the hydroxyethyl cation that can be delayed for up to a microsecond after ionization. C-O bond dissociation channels are less frequent, involving proton-transfer and double-proton transfer, forming and products respectively and exhibiting mixed sequential and concerted character. These results can be explained by the high potential barrier for the C-O bond dissociation seen in our ab initio quantum chemical calculations. We also observe coincident COH+ + C2Hn+ ions, suggesting exotic structural rearrangements, starting from the Frank-Condon geometry of the neutral 2-propanol system. Remarkably, the relative yield of the product is suppressed compared with methanol and alkene dications. Ab initio potentials and ground-state molecular dynamics simulations show that a rapid and direct C-C bond cleavage dominates the Coulomb explosion process, leaving no time for roaming which is a necessary precursor to the formation.
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Affiliation(s)
- Dror Bittner
- Hebrew University of Jerusalem - Givat Ram Campus, Israel
| | | | - Ester Livshits
- Hebrew University of Jerusalem - Givat Ram Campus, Israel
| | - Roi Baer
- Department of Chemistry, Hebrew University of Jerusalem - Givat Ram Campus, Israel
| | - Daniel Strasser
- Institute of Chemistry, Hebrew University of Jerusalem - Givat Ram Campus, Israel
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10
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Jochim B, DeJesus L, Dantus M. Ultrafast disruptive probing: Simultaneously keeping track of tens of reaction pathways. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:033003. [PMID: 35365005 DOI: 10.1063/5.0084837] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Ultrafast science depends on different implementations of the well-known pump-probe method. Here, we provide a formal description of ultrafast disruptive probing, a method in which the probe pulse disrupts a transient species that may be a metastable ion or a transient state of matter. Disruptive probing has the advantage of allowing for simultaneous tracking of the yield of tens of different processes. Our presentation includes a numerical model and experimental data on multiple products resulting from the strong-field ionization of two different molecules, partially deuterated methanol and norbornene. The correlated enhancement and depletion signals between all the different fragmentation channels offer comprehensive information on photochemical reaction pathways. In combination with ion imaging and/or coincidence momentum imaging or as complementary to atom-specific probing or ultrafast diffraction methods, disruptive probing is a particularly powerful tool for the study of strong-field laser-matter interactions.
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Affiliation(s)
- Bethany Jochim
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Lindsey DeJesus
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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11
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Ideböhn V, Sterling AJ, Wallner M, Olsson E, Squibb RJ, Miniotaite U, Forsmalm E, Forsmalm M, Stranges S, Dyke JM, Duarte F, Eland JHD, Feifel R. Single photon double and triple ionization of allene. Phys Chem Chem Phys 2022; 24:786-796. [PMID: 34927639 DOI: 10.1039/d1cp04666g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Double and triple ionization of allene are investigated using electron-electron, ion-ion, electron-electron-ion and electron-electron-ion-ion (ee, ii, eei, eeii) coincidence spectroscopies at selected photon energies. The results provide supporting evidence for a previously proposed roaming mechanism in H3+ formation by double ionization. The lowest vertical double ionization energy is found to be 27.9 eV, while adiabatic double ionization is not accessed by vertical ionization at the neutral geometry. The triple ionization energy is found to be close to 50 eV in agreement with theoretical predictions. The doubly charged parent ion is stable up to about 2 eV above the threshold, after which dissociations by charge separation and by double charge retention occur with comparable intensities. Fragmentation to H+ + C3H3+ starts immediately above the threshold as a slow (metastable) decay with 130.5 ± 9.9 ns mean lifetime.
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Affiliation(s)
- Veronica Ideböhn
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden.
| | - Alistair J Sterling
- Department of Chemistry, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, UK
| | - Måns Wallner
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden.
| | - Emelie Olsson
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden.
| | - Richard J Squibb
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden.
| | - Ugne Miniotaite
- Department of Physics, Chalmers University of Technology, Kemigården 1, 412 96 Gothenburg, Sweden
| | - Emma Forsmalm
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden.
| | - Malin Forsmalm
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden.
| | - Stefano Stranges
- IOM-CNR Tasc, SS-14, Km 163.5 Area Science Park, Basovizza 34149, Trieste, Italy.,Dipartimento di Chimica e Tecnologie del Farmaco, Universitá Sapienza, Rome I-00185, Italy
| | - John M Dyke
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK
| | - Fernanda Duarte
- Department of Chemistry, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, UK
| | - John H D Eland
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK
| | - Raimund Feifel
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden.
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12
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Basnayake G, Hoerner P, Mignolet B, Lee MK, Lin YF, Winney AH, Debrah DA, Popaj L, Shi X, Lee SK, Schlegel HB, Remacle F, Li W. Ellipticity controlled dissociative double ionization of ethane by strong fields. Phys Chem Chem Phys 2021; 23:23537-23543. [PMID: 34647554 DOI: 10.1039/d1cp03585a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The yields of all dissociation channels of ethane dications produced by strong field double ionization were measured. It was found that the branching ratios can be controlled by varying the ellipticity of laser pulses. The CH3+ formation and H+ formation channels show a clear competition, producing the highest and lowest branching ratios at ellipticity of ∼0.6, respectively. With the help of theoretical calculations, such a control was attributed to the ellipticity dependent yields of different sequential ionization pathways.
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Affiliation(s)
- Gihan Basnayake
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Paul Hoerner
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Benoit Mignolet
- Department of Chemistry, University of Liège, B4000 Liège, Belgium
| | - Mi Kyung Lee
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Yun Fei Lin
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Alexander H Winney
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Duke A Debrah
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Leon Popaj
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Xuetao Shi
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Suk Kyoung Lee
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - H Bernhard Schlegel
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | | | - Wen Li
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
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13
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Das R, Pandey DK, Nimma V, P M, Bhardwaj P, Chandravanshi P, Shameem K M M, Singh DK, Kushawaha RK. Strong-field ionization of polyatomic molecules: ultrafast H atom migration and bond formation in the photodissociation of CH 3OH. Faraday Discuss 2021; 228:432-450. [PMID: 33576353 DOI: 10.1039/d0fd00129e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong-field ionization induces various complex phenomena like bond breaking, intramolecular hydrogen migration, and bond association in polyatomic molecules. The H-atom migration and bond formation in CH3OH induced by intense femtosecond laser pulses are investigated using a Velocity Map Imaging (VMI) spectrometer. Various laser parameters like intensity (1.5 × 1013 W cm-2-12.5 × 1013 W cm-2), pulse duration (29 fs and 195 fs), wavelength (800 nm and 1300 nm), and polarization (linear and circular) can serve as a quantum control for hydrogen migration and the yield of Hn+ (n = 1-3) ions which have been observed in this study. Further, in order to understand the ejection mechanism of the hydrogen molecular ions H2+ and H3+ from singly-ionized CH3OH, quantum chemical calculations were employed. The dissociation processes of CH3OH+ occurring by four dissociative channels to form CHO+ + H3, H3+ + CHO, CH2+ + H2O, and H2O+ + CH2 are studied. Using the combined approach of experiments and theory, we have successfully explained the mechanism of intramolecular hydrogen migration and predicted the dissociative channels of singly-ionized CH3OH.
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Affiliation(s)
- Rituparna Das
- Physical Research Laboratory, Ahmedabad, India. and Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | - Deepak K Pandey
- Department of Physics, Institute of Infrastructure Technology Research and Management, Ahmedabad, 380026, India
| | | | - Madhusudhan P
- Physical Research Laboratory, Ahmedabad, India. and Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | - Pranav Bhardwaj
- Physical Research Laboratory, Ahmedabad, India. and Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | | | | | - Dheeraj K Singh
- Department of Physics, Institute of Infrastructure Technology Research and Management, Ahmedabad, 380026, India
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14
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Wang E, Ren X, Dorn A. Role of the Environment in Quenching the Production of H_{3}^{+} from Dicationic Clusters of Methanol. PHYSICAL REVIEW LETTERS 2021; 126:103402. [PMID: 33784146 DOI: 10.1103/physrevlett.126.103402] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/08/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
Ionization and subsequent isomerization of organic molecules has been suggested as an important source of trihydrogen H_{3}^{+} cations in outer space. The high interest in such reactions has initiated many experimental and theoretical studies for various molecules. Here, we report measurements as well as ab initio molecular dynamics simulations on the fragmentation of dicationic methanol monomers and clusters ionized by low-energy (90 eV) electrons. Experimentally, for dicationic monomers, a fragmentation channel for the formation of H_{3}^{+} in coincidence with a COH^{+} cation is observed. The simulations show that an intermediate neutral H_{2} is formed in the first step, and its roaming around the dication ends in the formation of H_{3}^{+}. The entire reaction takes about 100-500 fs. The calculated kinetic energy release for the H_{3}^{+}+COH^{+} ion pair is in excellent agreement with the experimental result. In contrast, for the dicationic clusters, due to the possibility of distributing the two charges onto different molecules, several fast dissociation channels occur and suppress the roaming of H_{2} and formation of H_{3}^{+}. The present Letter suggests that the quenching of H_{3}^{+} formation by the chemical environment is a general phenomenon in dicationic clusters of organic molecules.
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Affiliation(s)
- Enliang Wang
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Xueguang Ren
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Alexander Dorn
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
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15
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Zhang Y, Ren B, Yang CL, Wei L, Wang B, Han J, Yu W, Qi Y, Zou Y, Chen L, Wang E, Wei B. Formation of H 3+ from ethane dication induced by electron impact. Commun Chem 2020; 3:160. [PMID: 36703403 PMCID: PMC9814254 DOI: 10.1038/s42004-020-00415-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 10/19/2020] [Indexed: 01/29/2023] Open
Abstract
Hydrogen migration plays an important role in the chemistry of hydrocarbons which considerably influences their chemical functions. The migration of one or more hydrogen atoms occurring in hydrocarbon cations has an opportunity to produce the simplest polyatomic molecule, i.e. H3+. Here we present a combined experimental and theoretical study of H3+ formation dynamics from ethane dication. The experiment is performed by 300 eV electron impact ionization of ethane and a pronounced yield of H3+ + C2H3+ coincidence channel is observed. The quantum chemistry calculations show that the H3+ formation channel can be opened on the ground-state potential energy surface of ethane dication via transition state and roaming mechanisms. The ab initio molecular dynamics simulation shows that the H3+ can be generated in a wide time range from 70 to 500 fs. Qualitatively, the trajectories of the fast dissociation follow the intrinsic reaction coordinate predicted by the conventional transition state theory. The roaming mechanism, compared to the transition state, occurs within a much longer timescale accompanied by nuclear motion of larger amplitude.
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Affiliation(s)
- Yu Zhang
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
- School of Mathematics, Physics and Information Engineering, Jiaxing University, 314001, Jiaxing, China
| | - Baihui Ren
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
| | - Chuan-Lu Yang
- School of Physics and Optoelectronics Engineering, Ludong University, 264025, Yantai, China
| | - Long Wei
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
| | - Bo Wang
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
| | - Jie Han
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
| | - Wandong Yu
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
| | - Yueying Qi
- School of Mathematics, Physics and Information Engineering, Jiaxing University, 314001, Jiaxing, China
| | - Yaming Zou
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
| | - Li Chen
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China
| | - Enliang Wang
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA.
| | - Baoren Wei
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, 200433, Shanghai, China.
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16
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Li C, Chin CH, Zhu T, Hui Zhang JZ. An ab initio/RRKM study of the reaction mechanism and product branching ratios of CH3OH+ and CH3OH++ dissociation. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Iwamoto N, Schwartz CJ, Jochim B, Raju P K, Feizollah P, Napierala JL, Severt T, Tegegn SN, Solomon A, Zhao S, Lam H, Wangjam TN, Kumarappan V, Carnes KD, Ben-Itzhak I, Wells E. Strong-field control of H 3 + production from methanol dications: Selecting between local and extended formation mechanisms. J Chem Phys 2020; 152:054302. [PMID: 32035476 DOI: 10.1063/1.5129946] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Using the CD3OH isotopologue of methanol, the ratio of D2H+ to D3 + formation is manipulated by changing the characteristics of the intense femtosecond laser pulse. Detection of D2H+ indicates a formation process involving two hydrogen atoms from the methyl side of the molecule and a proton from the hydroxyl side, while detection of D3 + indicates local formation involving only the methyl group. Both mechanisms are thought to involve a neutral D2 moiety. An adaptive control strategy that employs image-based feedback to guide the learning algorithm results in an enhancement of the D2H+/D3 + ratio by a factor of approximately two. The optimized pulses have secondary structures 110-210 fs after the main pulse and result in photofragments that have different kinetic energy release distributions than those produced from near transform limited pulses. Systematic changes to the linear chirp and higher order dispersion terms of the laser pulse are compared to the results obtained with the optimized pulse shapes.
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Affiliation(s)
- Naoki Iwamoto
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Charles J Schwartz
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Bethany Jochim
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - Kanaka Raju P
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - Peyman Feizollah
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - J L Napierala
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - T Severt
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - S N Tegegn
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - A Solomon
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - S Zhao
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Huynh Lam
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - Tomthin Nganba Wangjam
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - V Kumarappan
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - K D Carnes
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - I Ben-Itzhak
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - E Wells
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
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18
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Kling NG, Díaz-Tendero S, Obaid R, Disla MR, Xiong H, Sundberg M, Khosravi SD, Davino M, Drach P, Carroll AM, Osipov T, Martín F, Berrah N. Time-resolved molecular dynamics of single and double hydrogen migration in ethanol. Nat Commun 2019; 10:2813. [PMID: 31249306 PMCID: PMC6597707 DOI: 10.1038/s41467-019-10571-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 04/30/2019] [Indexed: 11/17/2022] Open
Abstract
Being the lightest, most mobile atom that exists, hydrogen plays an important role in the chemistry of hydrocarbons, proteins and peptides and most biomolecules. Hydrogen can undergo transfer, exchange and migration processes, having considerable impact on the chemical behavior of these molecules. Although much has been learned about reaction dynamics involving one hydrogen atom, less is known about those processes where two or more hydrogen atoms participate. Here we show that single and double hydrogen migrations occurring in ethanol cations and dications take place within a few hundred fs to ps, using a 3D imaging and laser pump-probe technique. For double hydrogen migration, the hydrogens are not correlated, with the second hydrogen migration promoting the breakup of the C-O bond. The probability of double hydrogen migration is quite significant, suggesting that double hydrogen migration plays a more important role than generally assumed. The conclusions are supported by state-of-the-art molecular dynamics calculations.
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Affiliation(s)
- Nora G Kling
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA.
| | - S Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
| | - R Obaid
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - M R Disla
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - H Xiong
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - M Sundberg
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - S D Khosravi
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - M Davino
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - P Drach
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - A M Carroll
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA
| | - T Osipov
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - F Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049, Madrid, Spain.
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018, Donostia-San Sebastián, Spain.
| | - N Berrah
- Department of Physics, University of Connecticut, Storrs, CT, 06269, USA.
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19
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Zhang Y, Wang B, Wei L, Jiang T, Yu W, Hutton R, Zou Y, Chen L, Wei B. Proton migration in hydrocarbons induced by slow highly charged ion impact. J Chem Phys 2019; 150:204303. [PMID: 31153159 DOI: 10.1063/1.5088690] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Different from most of the previous studies using light or photons, we use highly charged ions as projectiles to activate proton migration in the smallest saturated and unsaturated hydrocarbon molecules, i.e., CH4 and C2H2. The H3 + formation channel (H3 + + CH+) and isomerization channel (C+ + CH2 +), serving as indicators of proton migration, are observed in the fragmentation of CH4 and C2H2 dications. Corresponding kinematical information, i.e., kinetic energy release, is for the first time obtained in the collisions with highly charged ions. In particular, for the C+ + CH2 + channel, a new pathway is identified, which is tentatively attributed to the isomerization on high-lying states of acetylene dication. The kinetic energy release spectra for other two-body breakup channels are also determined and precursor dication states could thus be identified.
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Affiliation(s)
- Y Zhang
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - B Wang
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - L Wei
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - T Jiang
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - W Yu
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - R Hutton
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - Y Zou
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - L Chen
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - B Wei
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
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20
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Michie MJ, Ekanayake N, Weingartz NP, Stamm J, Dantus M. Quantum coherent control of H 3 + formation in strong fields. J Chem Phys 2019; 150:044303. [PMID: 30709246 DOI: 10.1063/1.5070067] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Quantum coherent control (QCC) has been successfully demonstrated experimentally and theoretically for two- and three-photon optical excitation of atoms and molecules. Here, we explore QCC using spectral phase functions with a single spectral phase step for controlling the yield of H3 + from methanol under strong laser field excitation. We observe a significant and systematic enhanced production of H3 + when a negative 34 π phase step is applied near the low energy region of the laser spectrum and when a positive 34 π phase step is applied near the high energy region of the laser spectrum. In some cases, most notably the HCO+ fragment, we found the enhancement exceeded the yield measured for transform limited pulses. The observation of enhanced yield is surprising and far from the QCC prediction of yield suppression. The observed QCC enhancement implies an underlying strong field process responsible for polyatomic fragmentation controllable by easy to reproduce shaped pulses.
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Affiliation(s)
- Matthew J Michie
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USADepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Nagitha Ekanayake
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USADepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Nicholas P Weingartz
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USADepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Jacob Stamm
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USADepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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21
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Ekanayake N, Severt T, Nairat M, Weingartz NP, Farris BM, Kaderiya B, Feizollah P, Jochim B, Ziaee F, Borne K, Raju P K, Carnes KD, Rolles D, Rudenko A, Levine BG, Jackson JE, Ben-Itzhak I, Dantus M. H 2 roaming chemistry and the formation of H 3+ from organic molecules in strong laser fields. Nat Commun 2018; 9:5186. [PMID: 30518927 PMCID: PMC6281587 DOI: 10.1038/s41467-018-07577-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 11/06/2018] [Indexed: 11/11/2022] Open
Abstract
Roaming mechanisms, involving the brief generation of a neutral atom or molecule that stays in the vicinity before reacting with the remaining atoms of the precursor, are providing valuable insights into previously unexplained chemical reactions. Here, the mechanistic details and femtosecond time-resolved dynamics of H3+ formation from a series of alcohols with varying primary carbon chain lengths are obtained through a combination of strong-field laser excitation studies and ab initio molecular dynamics calculations. For small alcohols, four distinct pathways involving hydrogen migration and H2 roaming prior to H3+ formation are uncovered. Despite the increased number of hydrogens and possible combinations leading to H3+ formation, the yield decreases as the carbon chain length increases. The fundamental mechanistic findings presented here explore the formation of H3+, the most important ion in interstellar chemistry, through H2 roaming occurring in ionic species. H2 roaming is associated with H3+ formation when certain organic molecules are exposed to strong laser fields. Here, the mechanistic details and time-resolved dynamics of H3+ formation from a series of alcohols were obtained and found that the product yield decreases as the carbon chain length increases.
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Affiliation(s)
- Nagitha Ekanayake
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Travis Severt
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Muath Nairat
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Nicholas P Weingartz
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Benjamin M Farris
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Balram Kaderiya
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Peyman Feizollah
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Bethany Jochim
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Farzaneh Ziaee
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kurtis Borne
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kanaka Raju P
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kevin D Carnes
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Benjamin G Levine
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - James E Jackson
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Itzik Ben-Itzhak
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA. .,Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824, USA.
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22
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Xu S, Zhao H, Zhu X, Guo D, Feng W, Lau KC, Ma X. Dissociation of [HCCH] 2+ to H 2+ and C 2+: a benchmark reaction involving H migration, H-H combination, and C-H bond cleavage. Phys Chem Chem Phys 2018; 20:27725-27729. [PMID: 30383056 DOI: 10.1039/c8cp05780j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the formation of H2+ and C2+ from dissociation of acetylene induced by α-particle irradiation. The unusual dissociation channel [C2H2]2+ → H2+ + C2+ is unambiguously identified by measuring the time-of-flight of both fragmented ions in coincidence. Our quantum chemical calculation confirms the existence of this dissociation pathway. It shows that [HCCH]2+ is firstly populated to the 3Π excited electronic state, followed by acetylene-vinylidene isomerization, and finally the vinylidene-like intermediate dissociates to H2+ and C2+. This dissociation channel is the simplest prototypical reaction involving H migration, H-H combination, and C-H bond cleavage. The current study plays an important role for understanding the H2+/H3+ formation reactions from organic di-cations in an interstellar medium.
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Affiliation(s)
- Shenyue Xu
- Institute of Modern Physics, Chinese Academy of Sciences, Nanchang Road 509, Lanzhou 730000, China.
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23
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Tu YJ, Schlegel HB. Ab initio molecular dynamics study of the reactions of allene cation induced by intense 7 micron laser pulses. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1506175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yi-Jung Tu
- Department of Chemistry, Wayne State University, Detroit, MI, USA
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24
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Coherent vibrations in methanol cation probed by periodic H3+ ejection after double ionization. Commun Chem 2018. [DOI: 10.1038/s42004-017-0006-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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25
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Yatsuhashi T, Nakashima N. Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2018. [DOI: 10.1016/j.jphotochemrev.2017.12.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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26
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Ekanayake N, Nairat M, Kaderiya B, Feizollah P, Jochim B, Severt T, Berry B, Pandiri KR, Carnes KD, Pathak S, Rolles D, Rudenko A, Ben-Itzhak I, Mancuso CA, Fales BS, Jackson JE, Levine BG, Dantus M. Mechanisms and time-resolved dynamics for trihydrogen cation (H 3+) formation from organic molecules in strong laser fields. Sci Rep 2017; 7:4703. [PMID: 28680157 PMCID: PMC5498647 DOI: 10.1038/s41598-017-04666-w] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/18/2017] [Indexed: 11/09/2022] Open
Abstract
Strong-field laser-matter interactions often lead to exotic chemical reactions. Trihydrogen cation formation from organic molecules is one such case that requires multiple bonds to break and form. We present evidence for the existence of two different reaction pathways for H3+ formation from organic molecules irradiated by a strong-field laser. Assignment of the two pathways was accomplished through analysis of femtosecond time-resolved strong-field ionization and photoion-photoion coincidence measurements carried out on methanol isotopomers, ethylene glycol, and acetone. Ab initio molecular dynamics simulations suggest the formation occurs via two steps: the initial formation of a neutral hydrogen molecule, followed by the abstraction of a proton from the remaining CHOH2+ fragment by the roaming H2 molecule. This reaction has similarities to the H2 + H2+ mechanism leading to formation of H3+ in the universe. These exotic chemical reaction mechanisms, involving roaming H2 molecules, are found to occur in the ~100 fs timescale. Roaming molecule reactions may help to explain unlikely chemical processes, involving dissociation and formation of multiple chemical bonds, occurring under strong laser fields.
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Affiliation(s)
- Nagitha Ekanayake
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Muath Nairat
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Balram Kaderiya
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Peyman Feizollah
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Bethany Jochim
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Travis Severt
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Ben Berry
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Kanaka Raju Pandiri
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Kevin D Carnes
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Shashank Pathak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Itzik Ben-Itzhak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Christopher A Mancuso
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - B Scott Fales
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - James E Jackson
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Benjamin G Levine
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA. .,Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
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27
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Li H, Kling NG, Gaumnitz T, Burger C, Siemering R, Schötz J, Liu Q, Ban L, Pertot Y, Wu J, Azzeer AM, de Vivie-Riedle R, Wörner HJ, Kling MF. Sub-cycle steering of the deprotonation of acetylene by intense few-cycle mid-infrared laser fields. OPTICS EXPRESS 2017; 25:14192-14203. [PMID: 28789005 DOI: 10.1364/oe.25.014192] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 06/02/2017] [Indexed: 05/21/2023]
Abstract
Directional breaking of the C-H/C-D molecular bond is manipulated in acetylene (C2H2) and deuterated acetylene (C2D2) by waveform controlled few-cycle mid-infrared laser pulses with a central wavelength around 1.6 μm at an intensity of about 8 × 1013 W/cm2. The directionality of the deprotonation of acetylene is controlled by changing the carrier-envelope phase (CEP). The CEP-control can be attributed to the laser-induced superposition of vibrational modes, which is sensitive to the sub-cycle evolution of the laser waveform. Our experiments and simulations indicate that near-resonant, intense mid-infrared pulses permit a higher degree of control of the directionality of the reaction compared to those obtained in near-infrared fields, in particular for the deuterated species.
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28
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Shi X, Li W, Schlegel HB. Computational simulations of hydrogen circular migration in protonated acetylene induced by circularly polarized light. J Chem Phys 2016; 145:084309. [DOI: 10.1063/1.4961644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Xuetao Shi
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
| | - Wen Li
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
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29
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Li H, Kling NG, Förg B, Stierle J, Kessel A, Trushin SA, Kling MF, Kaziannis S. Carrier-envelope phase dependence of the directional fragmentation and hydrogen migration in toluene in few-cycle laser fields. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2016; 3:043206. [PMID: 26958589 PMCID: PMC4760969 DOI: 10.1063/1.4941601] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Accepted: 01/11/2016] [Indexed: 05/29/2023]
Abstract
The dissociative ionization of toluene initiated by a few-cycle laser pulse as a function of the carrier envelope phase (CEP) is investigated using single-shot velocity map imaging. Several ionic fragments, CH3 (+), H2 (+), and H3 (+), originating from multiply charged toluene ions present a CEP-dependent directional emission. The formation of H2 (+) and H3 (+) involves breaking C-H bonds and forming new bonds between the hydrogen atoms within the transient structure of the multiply charged precursor. We observe appreciable intensity-dependent CEP-offsets. The experimental data are interpreted with a mechanism that involves laser-induced coupling of vibrational states, which has been found to play a role in the CEP-control of molecular processes in hydrocarbon molecules, and appears to be of general importance for such complex molecules.
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Affiliation(s)
| | | | | | - Johannes Stierle
- Max-Planck-Institut für Quantenoptik , Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
| | - Alexander Kessel
- Max-Planck-Institut für Quantenoptik , Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
| | - Sergei A Trushin
- Max-Planck-Institut für Quantenoptik , Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
| | | | - Spyros Kaziannis
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina , Ioannina 45500, Greece
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30
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Wasowicz TJ, Pranszke B. Observation of the Hydrogen Migration in the Cation-Induced Fragmentation of the Pyridine Molecules. J Phys Chem A 2016; 120:964-71. [DOI: 10.1021/acs.jpca.5b11298] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomasz J. Wasowicz
- Department
of Physics of Electronic Phenomena, Gdańsk University of Technology, ul. G. Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Bogusław Pranszke
- Institute
of Experimental Physics, University of Gdańsk, ul. Wita Stwosza 59, 80-952 Gdańsk, Poland
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31
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Yamazaki T, Watanabe Y, Kanya R, Yamanouchi K. Decomposition of cyclohexane ion induced by intense femtosecond laser fields by ion-trap time-of-flight mass spectrometry. J Chem Phys 2016; 144:024313. [DOI: 10.1063/1.4939769] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Takao Yamazaki
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yusuke Watanabe
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Reika Kanya
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kaoru Yamanouchi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- NANOQUINE, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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32
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Amada M, Sato Y, Tsuge M, Hoshina K. Near-infrared femtosecond laser ionization of the acetic acid dimer. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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33
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Wu H, Zhang S, Zhang J, Yang Y, Deng L, Jia T, Wang Z, Sun Z. Observation of Hydrogen Migration in Cyclohexane under an Intense Femtosecond Laser Field. J Phys Chem A 2015; 119:2052-7. [DOI: 10.1021/jp510667z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Hua Wu
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Shian Zhang
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Jian Zhang
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Yan Yang
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Li Deng
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Tianqing Jia
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Zugeng Wang
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Zhenrong Sun
- State Key Laboratory of Precision
Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, P. R. China
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34
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Hydrogen Migration in Intense Laser Fields: Analysis and Control in Concert. SPRINGER SERIES IN CHEMICAL PHYSICS 2015. [DOI: 10.1007/978-3-319-06731-5_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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35
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Kaziannis S, Kotsina N, Kosmidis C. Interaction of toluene with two-color asymmetric laser fields: Controlling the directional emission of molecular hydrogen fragments. J Chem Phys 2014; 141:104319. [DOI: 10.1063/1.4895097] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Kaziannis
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece
| | - N. Kotsina
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece
| | - C. Kosmidis
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece
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36
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Zubek M, Wasowicz TJ, Dąbkowska I, Kivimäki A, Coreno M. Hydrogen migration in formation of NH(A³Π) radicals via superexcited states in photodissociation of isoxazole molecules. J Chem Phys 2014; 141:064301. [PMID: 25134565 DOI: 10.1063/1.4891808] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Formation of the excited NH(A(3)Π) free radicals in the photodissociation of isoxazole (C3H3NO) molecules has been studied over the 14-22 eV energy range using photon-induced fluorescence spectroscopy. The NH(A(3)Π) is produced through excitation of the isoxazole molecules into higher-lying superexcited states. Observation of the NH radical, which is not a structural unit of the isoxazole molecule, corroborates the hydrogen atom (or proton) migration within the molecule prior to dissociation. The vertical excitation energies of the superexcited states were determined and the dissociation mechanisms of isoxazole are discussed. The density functional and ab initio quantum chemical calculations have been performed to study the mechanism of the NH formation.
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Affiliation(s)
- Mariusz Zubek
- Department of Physics of Electronic Phenomena, Gdańsk University of Technology, 80-233 Gdańsk, Poland
| | - Tomasz J Wasowicz
- Department of Physics of Electronic Phenomena, Gdańsk University of Technology, 80-233 Gdańsk, Poland
| | - Iwona Dąbkowska
- Department of Chemistry, University of Gdańsk, 80-952 Gdańsk, Poland
| | | | - Marcello Coreno
- Gas Phase beamline@Elettra, Basovizza Area Science Park, 34149 Trieste, Italy
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37
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Nakai K, Kato T, Kono H, Yamanouchi K. Communication: long-lived neutral H2 in hydrogen migration within methanol dication. J Chem Phys 2014; 139:181103. [PMID: 24320247 DOI: 10.1063/1.4830397] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The ejection of triatomic hydrogen molecular ions HD2(+) and D3(+) from CD3OH(2+) is investigated by first-principle molecular dynamics simulation. Two C-D chemical bonds are found to be broken to form a neutral D2 moiety that vibrates, rotates, and moves for a relatively long period of time (20-330 fs) towards a transition state leading to the ejection of HD2(+) or D3(+). The formation of such a long-lived neutral D2 moiety within a hydrocarbon molecule interprets well the recent experimental findings of the long lifetime of doubly charged energized hydrocarbon molecules prior to the ejection of H3(+).
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Affiliation(s)
- K Nakai
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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38
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Kotsina N, Kaziannis S, Kosmidis C. Hydrogen migration in methanol studied under asymmetric fs laser irradiation. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.04.040] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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39
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Subfemtosecond steering of hydrocarbon deprotonation through superposition of vibrational modes. Nat Commun 2014; 5:3800. [DOI: 10.1038/ncomms4800] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Accepted: 04/03/2014] [Indexed: 12/19/2022] Open
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40
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Wang C, Wang B, Okunishi M, Roeterdink W, Ding D, Zhu R, Prümper G, Shimada K, Ueda K. Ion–ion coincidence imaging of dissociative ionization dynamics of formic acid in intense laser fields. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2013.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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41
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Schirmel N, Reusch N, Horsch P, Weitzel KM. Formation of fragment ions (H+, H3+, CH3+) from ethane in intense femtosecond laser fields – from understanding to control. Faraday Discuss 2013; 163:461-74; discussion 513-43. [DOI: 10.1039/c3fd20152j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Kanya R, Kudou T, Schirmel N, Miura S, Weitzel KM, Hoshina K, Yamanouchi K. Hydrogen scrambling in H 3+generation from ethane induced by ultrashort intense laser fields. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20134102034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Kanya R, Kudou T, Schirmel N, Miura S, Weitzel KM, Hoshina K, Yamanouchi K. Hydrogen scrambling in ethane induced by intense laser fields: Statistical analysis of coincidence events. J Chem Phys 2012; 136:204309. [DOI: 10.1063/1.4720503] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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44
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Okino T, Watanabe A, Xu H, Yamanouchi K. Two-body Coulomb explosion in methylacetylene in intense laser fields: double proton migration and proton/deuteron exchange. Phys Chem Chem Phys 2012; 14:4230-5. [DOI: 10.1039/c2cp23880b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Abstract
Ab initio classical molecular dynamics calculations have been used to simulate the dissociation of H(2)NCH(2+) in a strong laser field. The frequencies of the continuous oscillating electric field were chosen to be ω = 0.02, 0.06, and 0.18 au (2280, 760, and 253 nm, respectively). The field had a maximum strength of 0.03 au (3.2 × 10(13) W cm(-2)) and was aligned with the CN bond. Trajectories were started with 100 kcal/mol of vibrational energy above zero point and were integrated for up to 600 fs at the B3LYP/6-311G(d,p) level of theory. A total of 200 trajectories were calculated for each of the three different frequencies and without a field. Two dissociation channels are observed: HNCH(+) + H(+) and H(2)NC(+) + H(+). About one-half to two-thirds of the H(+) dissociations occurred directly, while the remaining indirect dissociations occurred at a slower rate with extensive migration of H(+) between C and N. The laser field increased the initial dissociation rate by a factor of ca. 1.4 and decreased the half-life by a factor of ca. 0.75. The effects were similar at each of the three frequencies. The HNCH(+) to H(2)NC(+) branching ratio decreased from 10.6:1 in the absence of the field to an average of 8.4:1 in the laser field. The changes in the rates and branching ratios can be attributed to the laser field lowering the reaction barriers as a result of a difference in polarizability of the reactant and transition states.
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Affiliation(s)
- Jia Zhou
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
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46
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Kraus PM, Schwarzer MC, Schirmel N, Urbasch G, Frenking G, Weitzel KM. Unusual mechanism for H3+ formation from ethane as obtained by femtosecond laser pulse ionization and quantum chemical calculations. J Chem Phys 2011; 134:114302. [DOI: 10.1063/1.3561311] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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47
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Shoji F, Nagai T, Morimoto F. Existence of an exceptional reaction pathway for H 3+ formation observed in collision-induced dissociation of methane ions at 1000 eV. J Chem Phys 2011; 134:064310. [DOI: 10.1063/1.3553200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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Hoshina K, Kawamura H, Tsuge M, Tamiya M, Ishiguro M. Metastable decomposition and hydrogen migration of ethane dication produced in an intense femtosecond near-infrared laser field. J Chem Phys 2011; 134:064324. [DOI: 10.1063/1.3549137] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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50
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Xu H, Marceau C, Nakai K, Okino T, Chin SL, Yamanouchi K. Communication: Two stages of ultrafast hydrogen migration in methanol driven by intense laser fields. J Chem Phys 2010; 133:071103. [DOI: 10.1063/1.3473931] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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