1
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Bhattacharyya S, Wang E, Borne K, Chen K, Venkatachalam AS, Lam HVS, Ziaee F, Pathak S, Khmelnitskiy A, Carnes KD, Fehrenbach CW, Ben-Itzhak I, Rudenko A, Rolles D. Delayed Dissociation and Transient Isomerization during the Ultrafast Photodissociation of the Tribromomethane Cation. J Phys Chem Lett 2024; 15:12188-12196. [PMID: 39622006 DOI: 10.1021/acs.jpclett.4c02838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2024]
Abstract
We present a time-resolved measurement of the photodissociation and photoisomerization dynamics of bromoform (CHBr3) in the mono- and di-cationic states produced by near-infrared (NIR) strong-field ionization. The dissociation process is probed by NIR-induced Coulomb explosion imaging. We find that for dissociation channels involving production of HBr and Br2 fragments, which require the formation of new bonds, the dissociation appears to be delayed with respect to the primary C-Br bond dissociation channel. Ab initio molecular dynamics simulations support the observed delay. Moreover, the simulations suggest that reaction pathways involving transient isomerization via H- and Br-migration in the CHBr3 monocation are responsible for the formation of the HBr and Br2 fragments.
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Affiliation(s)
- Surjendu Bhattacharyya
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Enliang Wang
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Kurtis Borne
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Keyu Chen
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Anbu Selvam Venkatachalam
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Huynh Van Sa Lam
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Farzaneh Ziaee
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Shashank Pathak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Anton Khmelnitskiy
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Kevin D Carnes
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Charles W Fehrenbach
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Itzik Ben-Itzhak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
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2
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Yoshikawa K, Kanno M, Xue H, Kishimoto N, Goto S, Ota F, Tamura Y, Trinter F, Fehre K, Kaiser L, Stindl J, Tsitsonis D, Schöffler M, Dörner R, Boll R, Erk B, Mazza T, Mullins T, Rivas DE, Schmidt P, Usenko S, Meyer M, Wang E, Rolles D, Rudenko A, Kukk E, Jahnke T, Díaz-Tendero S, Martín F, Hatada K, Ueda K. Time-resolved photoelectron diffraction imaging of methanol photodissociation involving molecular hydrogen ejection. Phys Chem Chem Phys 2024; 26:25118-25130. [PMID: 39311030 DOI: 10.1039/d4cp01015a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
Imaging ultrafast atomic and molecular hydrogen motion with femtosecond time resolution is a challenge for ultrafast spectroscopy due to the low mass and small scattering cross section of the moving neutral hydrogen atoms and molecules. Here, we propose time- and momentum-resolved photoelectron diffraction (TMR-PED) as a way to overcome limitations of existing methodologies and illustrate its performance using a prototype molecular dissociation process involving the sequential ejection of a neutral hydrogen molecule and a proton from the methanol dication. By combining state-of-the-art molecular dynamics and electron-scattering methods, we show that TMR-PED allows for direct imaging of hydrogen atoms in action. More specifically, the fingerprint of hydrogen dynamics reflects the time evolution of polarization-averaged molecular-frame photoelectron angular distributions (PA-MFPADs) as would be recorded in X-ray pump/X-ray probe experiments with few-femtosecond resolution. We present the results of two precursor experiments that support the feasibility of this approach.
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Affiliation(s)
- Kazuki Yoshikawa
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Manabu Kanno
- Department of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
| | - Hao Xue
- Department of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
| | - Naoki Kishimoto
- Department of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
| | - Soki Goto
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Fukiko Ota
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Yoshiaki Tamura
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Florian Trinter
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Kilian Fehre
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Leon Kaiser
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Jonathan Stindl
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Dimitrios Tsitsonis
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Markus Schöffler
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Reinhard Dörner
- Institut für Kernphysik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - Rebecca Boll
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Benjamin Erk
- FLASH, DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Tommaso Mazza
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | | | | | | | - Sergey Usenko
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Michael Meyer
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Enliang Wang
- 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
| | - Edwin Kukk
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - Till Jahnke
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Sergio Díaz-Tendero
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 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, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, Spain.
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049 Madrid, Spain
| | - Keisuke Hatada
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Kiyoshi Ueda
- Department of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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3
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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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4
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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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5
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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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6
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Hydrogen migration in inner-shell ionized halogenated cyclic hydrocarbons. Sci Rep 2023; 13:2107. [PMID: 36747068 PMCID: PMC9902455 DOI: 10.1038/s41598-023-28694-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 01/23/2023] [Indexed: 02/08/2023] Open
Abstract
We have studied the fragmentation of the brominated cyclic hydrocarbons bromocyclo-propane, bromocyclo-butane, and bromocyclo-pentane upon Br(3d) and C(1s) inner-shell ionization using coincidence ion momentum imaging. We observe a substantial yield of CH3+ fragments, whose formation requires intramolecular hydrogen (or proton) migration, that increases with molecular size, which contrasts with prior observations of hydrogen migration in linear hydrocarbon molecules. Furthermore, by inspecting the fragment ion momentum correlations of three-body fragmentation channels, we conclude that CHx+ fragments (with x = 0, …, 3) with an increasing number of hydrogens are more likely to be produced via sequential fragmentation pathways. Overall trends in the molecular-size-dependence of the experimentally observed kinetic energy releases and fragment kinetic energies are explained with the help of classical Coulomb explosion simulations.
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7
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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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8
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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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9
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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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10
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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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11
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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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