1
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Yadav J, Safvan CP, Bhatt P, Kumari P, Singh J, Rajput J. Exploring three-body fragmentation of acetylene trication. J Chem Phys 2023; 158:074302. [PMID: 36813715 DOI: 10.1063/5.0135441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The three-body breakup of [C2H2]3+ formed in collision with Xe9+ moving at 0.5 atomic units of velocity is studied by using recoil ion momentum spectroscopy. Three-body breakup channels leading to (H+, C+, CH+) and (H+, H+, C2 +) fragments are observed in the experiment and their kinetic energy release is measured. The breakup into (H+, C+, CH+) occurs via concerted and sequential modes, whereas the breakup into (H+, H+, C2 +) shows only the concerted mode. By collecting events coming exclusively from the sequential breakup leading to (H+, C+, CH+), we have determined the kinetic energy release for the unimolecular fragmentation of the molecular intermediate, [C2H]2+. By using ab initio calculations, the potential energy surface for the lowest electronic state of [C2H]2+ is generated, which shows the existence of a metastable state with two possible dissociation pathways. A discussion on the agreement between our experimental results and these ab initio calculations is presented.
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Affiliation(s)
- Jatin Yadav
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - C P Safvan
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Pragya Bhatt
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Pooja Kumari
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - Jasmeet Singh
- Department of Physics, Keshav Mahavidyalaya, University of Delhi, Delhi 110034, India
| | - Jyoti Rajput
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
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2
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Varvarezos L, Delgado-Guerrero J, Di Fraia M, Kelly TJ, Palacios A, Callegari C, Cavalieri AL, Coffee R, Danailov M, Decleva P, Demidovich A, DiMauro L, Düsterer S, Giannessi L, Helml W, Ilchen M, Kienberger R, Mazza T, Meyer M, Moshammer R, Pedersini C, Plekan O, Prince KC, Simoncig A, Schletter A, Ueda K, Wurzer M, Zangrando M, Martín F, Costello JT. Controlling Fragmentation of the Acetylene Cation in the Vacuum Ultraviolet via Transient Molecular Alignment. J Phys Chem Lett 2023; 14:24-31. [PMID: 36562987 PMCID: PMC9841558 DOI: 10.1021/acs.jpclett.2c03354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
An open-loop control scheme of molecular fragmentation based on transient molecular alignment combined with single-photon ionization induced by a short-wavelength free electron laser (FEL) is demonstrated for the acetylene cation. Photoelectron spectra are recorded, complementing the ion yield measurements, to demonstrate that such control is the consequence of changes in the electronic response with molecular orientation relative to the ionizing field. We show that stable C2H2+ cations are mainly produced when the molecules are parallel or nearly parallel to the FEL polarization, while the hydrogen fragmentation channel (C2H2+ → C2H+ + H) predominates when the molecule is perpendicular to that direction, thus allowing one to distinguish between the two photochemical processes. The experimental findings are supported by state-of-the art theoretical calculations.
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Affiliation(s)
- L. Varvarezos
- School
of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9, Ireland
| | - J. Delgado-Guerrero
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Advanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
| | - M. Di Fraia
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - T. J. Kelly
- Department
of Computer Science and Applied Physics, Atlantic Technological University, T91 T8NW Galway, Ireland
| | - A. Palacios
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Institute
for Advanced Research in Chimical Sciences, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - C. Callegari
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - A. L. Cavalieri
- Institute
of Applied Physics, University of Bern, 3012 Bern, Switzerland
- Paul
Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - R. Coffee
- Linac
Coherent Light Source/SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - M. Danailov
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - P. Decleva
- Istituto
Officina dei Materiali IOM-CNR and Dipartimento di Scienze Chimiche
e Farmaceutiche, Università degli
Studi di Trieste, 34121 Trieste, Italy
| | - A. Demidovich
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - L. DiMauro
- Department
of Physics, The Ohio State University, Columbus, Ohio 43210, United States
| | - S. Düsterer
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
| | - L. Giannessi
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - W. Helml
- Fakultät
Physik, Technische Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, 44227 Dortmund, Germany
| | - M. Ilchen
- Institut
fur Physik und CINSaT, Universitat Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - R. Kienberger
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - T. Mazza
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - M. Meyer
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - R. Moshammer
- Max-Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - C. Pedersini
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - O. Plekan
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - K. C. Prince
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
- Department
of Chemistry and Biotechnology, Swinburne
University of Technology, Melbourne, Victoria 3122, Australia
| | - A. Simoncig
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - A. Schletter
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - K. Ueda
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - M. Wurzer
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - M. Zangrando
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
- Istituto
Officina dei Materiali, Consiglio Nazionale
delle Ricerche, 34149 Trieste, Italy
| | - F. Martín
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Advanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
- Condensed
Matter Physics Center, Universidad Autónoma
de Madrid, 28049 Madrid, Spain
| | - J. T. Costello
- School
of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9, Ireland
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3
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Dyakov YA, Adamson SO, Wang PK, Vetchinkin AS, Golubkov GV, Peskov VD, Rodionov AI, Syromyatnikov AG, Umanskii SY, Shestakov DV, Golubkov MG. Excited State Dynamics of CH3CHOO Criegee Intermediates in the Upper Atmosphere of the Earth. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122030149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Yadav J, Safvan CP, Bhatt P, Kumari P, Kumar A, Rajput J. Hydrogen migration in triply charged acetylene. J Chem Phys 2022; 156:141101. [DOI: 10.1063/5.0086427] [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 report on the direct experimental evidence of hydrogen migration in triply charged acetylene. The roaming hydrogen atom in a triply charged molecular ion is counter intuitive. The three body breakup channel [Formula: see text] is studied using the technique of recoil ion momentum spectroscopy. The triply charged ion was generated in collisions of the neutral parent with a slow highly charged Xe9+ ion. Three different dissociation pathways have been identified and separated, namely, concerted breakup in an acetylene configuration, concerted breakup in a vinylidene configuration, and sequential breakup via a [Formula: see text] intermediate, and the branching ratio for all three pathways are determined.
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Affiliation(s)
- Jatin Yadav
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - C. P. Safvan
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Pragya Bhatt
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Pooja Kumari
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - Aditya Kumar
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Jyoti Rajput
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
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5
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Dyakov YA, Adamson SO, Wang PK, Vetchinkin AS, Golubkov GV, Morozov II, Umanskii SY, Chaikina YA, Golubkov MG. Collisional Dissociation of Crieege CH3CHOO and Methane Intermediates in the Earth’s Upper Atmosphere. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121050134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Dyakov YA, Adamson S, Wang PK, Golubkov GV, Olkhov OA, Peskov VD, Rodionov ID, Rodionova IP, Rodionov AI, Shapovalov VL, Shestakov DV, Golubkov MG. Isomerization and Decay of a Criegee Intermediate CH3CHOO in the Earth’s Upper Atmosphere. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121030040] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Toledo EJL, Ramalho TC. Controversies about hydrogen bonds in water molecules on the influence of high magnetic fields: implications on structural and electronic parameters. MOLECULAR SIMULATION 2021. [DOI: 10.1080/08927022.2021.1957883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Teodorico C. Ramalho
- Chemistry Department, Federal University of Lavras, Lavras, Brazil
- Center for Basic and Applied Research, Faculty of Informatics and Management, University Hradec Kralove, Hradec Kralove, Czech Republic
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8
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Wei L, Lam CS, Zhang Y, Ren B, Han J, Wang B, Zou Y, Chen L, Lau KC, Wei B. Isomerization Dynamics in the Symmetric and Asymmetric Fragmentation of Ethane Dications. J Phys Chem Lett 2021; 12:5789-5795. [PMID: 34137607 DOI: 10.1021/acs.jpclett.1c01276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hydrogen- or proton-migration-induced isomerization has recently been of concern for its critical role in the dissociation of organic molecules of astrophysical or biological relevance. Herein we present a combined experimental and theoretical study of the two-body C-C bond breakdown dissociation of ethane dication. For the asymmetric fragmentation channel CH2+ + CH4+, the kinetic energy release measurements and ab initio quantum chemical calculations demonstrate that the reaction pathway involving hydrogen-migration-induced isomerization of [CH3-CH3]2+ to [CH2-CH4]2+ can be accessed via the lowest triplet state rather than the ground singlet state of ethane dication. Interestingly, it is found that a considerable proportion of the yield of symmetric fragmentation CH3+ + CH3+, which is usually considered from a direct Coulomb explosion and seemingly independent of isomerization, could come from the dissociation of ethane dication in the ground singlet state with the involvement of [CH3-CH3]2+ isomerization to intermediate [H2C(H2)CH2]2+ of the diborane-like double-bridged structure.
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Affiliation(s)
- Long Wei
- Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, China
| | - Chow-Shing Lam
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China
| | - Yu Zhang
- College of Data Science, Jiaxing University, Jiaxing 314001, China
| | - Baihui Ren
- Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, China
| | - Jie Han
- Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, China
| | - Bo Wang
- Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, China
| | - Yaming Zou
- Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, China
| | - Li Chen
- Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, China
| | - Kai-Chung Lau
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China
| | - Baoren Wei
- Institute of Modern Physics, Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Fudan University, Shanghai 200433, China
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9
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Mandal S, Gopal R, Srinivas H, D'Elia A, Sen A, Sen S, Richter R, Coreno M, Bapat B, Mudrich M, Sharma V, Krishnan SR. Coincident angle-resolved state-selective photoelectron spectroscopy of acetylene molecules: a candidate system for time-resolved dynamics. Faraday Discuss 2021; 228:242-265. [PMID: 33687396 DOI: 10.1039/d0fd00120a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The acetylene-vinylidene system serves as a benchmark for investigations of ultrafast dynamical processes where the coupling of the electronic and nuclear degrees of freedom provides a fertile playground to explore the femto- and sub-femto-second physics with coherent extreme-ultraviolet (EUV) photon sources both on the table-top as well as free-electron lasers. We focus on detailed investigations of this molecular system in the photon energy range 19-40 eV where EUV pulses can probe the dynamics effectively. We employ photoelectron-photoion coincidence (PEPICO) spectroscopy to uncover hitherto unrevealed aspects of this system. In this work, the role of excited states of the C2H2+ cation, the primary photoion, is specifically addressed. From photoelectron energy spectra and angular distributions, the nature of the dissociation and isomerization channels is discerned. Exploiting the 4π-collection geometry of the velocity map imaging spectrometer, we not only probe pathways where the efficiency of photoionization is inherently high but also perform PEPICO spectroscopy on relatively weak channels.
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Affiliation(s)
- S Mandal
- Indian Institute of Science Education and Research, Pune 411008, India
| | - R Gopal
- Tata Institute of Fundamental Research, Hyderabad 500107, India
| | - H Srinivas
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - A D'Elia
- IOM-CNR, Laboratorio TASC, Basovizza SS-14, km 163.5, 34149 Trieste, Italy
| | - A Sen
- Indian Institute of Science Education and Research, Pune 411008, India
| | - S Sen
- Indian Institute of Technology Hyderabad, Kandi 502285, India.
| | - R Richter
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Italy
| | - M Coreno
- Istituto di Struttura della Materia - Consiglio Nazionale delle Ricerche (ISM-CNR), 34149 Trieste, Italy and INFN-LNF, via Enrico Fermi 54, 00044 Frascati, Italy
| | - B Bapat
- Indian Institute of Science Education and Research, Pune 411008, India
| | - M Mudrich
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark and Department of Physics, QuCenDiEm-Group, Indian Institute of Technology Madras, Chennai 600036, India.
| | - V Sharma
- Indian Institute of Technology Hyderabad, Kandi 502285, India.
| | - S R Krishnan
- Department of Physics, QuCenDiEm-Group, Indian Institute of Technology Madras, Chennai 600036, India.
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10
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Dyakov YA, Puzankov AA, Adamson SO, Golubkov GV, Morozov II, Olkhov OA, Shapovalov VL, Shestakov DV, Golubkov MG. Dissociation of Phenylacetylene and Its Derivatives by Electron Impact. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2020. [DOI: 10.1134/s1990793120050188] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Liekhus-Schmaltz C, Zhu X, McCracken GA, Cryan JP, Martinez TJ, Bucksbaum PH. Strictly non-adiabatic quantum control of the acetylene dication using an infrared field. J Chem Phys 2020; 152:184302. [DOI: 10.1063/5.0007058] [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
Affiliation(s)
- Chelsea Liekhus-Schmaltz
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Xiaolei Zhu
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Gregory A. McCracken
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
| | - James P. Cryan
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Todd J. Martinez
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Philip H. Bucksbaum
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Physics, Stanford University, Stanford, California 94305, USA
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
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12
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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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13
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Yu W, Gao CZ, Jiang T, Zou Y, Wang JG, Wu Y, Wei B. A theoretical study of Ar 8+-acetylene collisions at 1.2 MeV: Ionization and dissociation dynamics. J Chem Phys 2019; 150:124304. [PMID: 30927893 DOI: 10.1063/1.5082729] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We theoretically study Ar8+-induced dissociation of C2H2 molecule at 1.2 MeV using the time-dependent density-functional theory non-adiabatically coupled to nuclear dynamics. We find that molecular dissociation depends strongly on the ionization at the initial stage and the collision configuration. A detailed analysis shows a correspondence between the charge state of [C2H2]q+ and the final fragments. A remarkable impact parameter effect provides deep insights of bond breakup and electronic transport. We analyze two typical sequential dissociation channels reported in experiments by tracking structural and electronic dynamics in real time. Our results provide better understanding of experiments. Moreover, the comparison between various exchange-correlation functionals reveals that electrons' correlation and self-interaction do not significantly impact the initial ionization and fragment distribution in the present study.
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Affiliation(s)
- W Yu
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - C-Z Gao
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - T Jiang
- 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
| | - J-G Wang
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - Y Wu
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - B Wei
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
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14
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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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15
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Li Z, Inhester L, Liekhus-Schmaltz C, Curchod BFE, Snyder JW, Medvedev N, Cryan J, Osipov T, Pabst S, Vendrell O, Bucksbaum P, Martinez TJ. Ultrafast isomerization in acetylene dication after carbon K-shell ionization. Nat Commun 2017; 8:453. [PMID: 28878226 PMCID: PMC5587545 DOI: 10.1038/s41467-017-00426-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 06/28/2017] [Indexed: 11/09/2022] Open
Abstract
Ultrafast proton migration and isomerization are key processes for acetylene and its ions. However, the mechanism for ultrafast isomerization of acetylene [HCCH]2+ to vinylidene [H2CC]2+ dication remains nebulous. Theoretical studies show a large potential barrier ( > 2 eV) for isomerization on low-lying dicationic states, implying picosecond or longer isomerization timescales. However, a recent experiment at a femtosecond X-ray free-electron laser suggests sub-100 fs isomerization. Here we address this contradiction with a complete theoretical study of the dynamics of acetylene dication produced by Auger decay after X-ray photoionization of the carbon atom K shell. We find no sub-100 fs isomerization, while reproducing the salient features of the time-resolved Coulomb imaging experiment. This work resolves the seeming contradiction between experiment and theory and also calls for careful interpretation of structural information from the widely applied Coulomb momentum imaging method. The timescale of isomerization in molecules involving ultrafast migration of constituent atoms is difficult to measure. Here the authors report that sub-100 fs isomerization time on acetylene dication in lower electronic states is not possible and point to misinterpretation of recent experimental results.
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Affiliation(s)
- Zheng Li
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA.,Department of Chemistry and the PULSE Institute, Stanford University, 333 Campus Drive, Stanford, California, 94305, USA
| | - Ludger Inhester
- Center for Free Electron Laser Science, Deutsches Elektronen-Synchrotron, Notkestraße 85, D-22607, Hamburg, Germany.,Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, D-22761, Hamburg, Germany
| | - Chelsea Liekhus-Schmaltz
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA.,Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, California, 94305, USA
| | - Basile F E Curchod
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA.,Department of Chemistry and the PULSE Institute, Stanford University, 333 Campus Drive, Stanford, California, 94305, USA
| | - James W Snyder
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA.,Department of Chemistry and the PULSE Institute, Stanford University, 333 Campus Drive, Stanford, California, 94305, USA
| | - Nikita Medvedev
- Center for Free Electron Laser Science, Deutsches Elektronen-Synchrotron, Notkestraße 85, D-22607, Hamburg, Germany.,Department of Radiation and Chemical Physics, Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21, Prague 8, Czech Republic.,Laser Plasma Department, Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 3, 182 00, Prague 8, Czech Republic
| | - James Cryan
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA
| | - Timur Osipov
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA
| | - Stefan Pabst
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts, 02138, USA
| | - Oriol Vendrell
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus, Denmark
| | - Phil Bucksbaum
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA.,Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, California, 94305, USA
| | - Todd J Martinez
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, USA. .,Department of Chemistry and the PULSE Institute, Stanford University, 333 Campus Drive, Stanford, California, 94305, USA.
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16
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Ma P, Wang C, Li X, Yu X, Tian X, Hu W, Yu J, Luo S, Ding D. Ultrafast proton migration and Coulomb explosion of methyl chloride in intense laser fields. J Chem Phys 2017; 146:244305. [PMID: 28668031 DOI: 10.1063/1.4989565] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigated the ultrafast proton migration and the Coulomb explosion (CE) dynamics of methyl chloride (CH3Cl) in intense femtosecond laser fields at the wavelengths of 800 nm (5.5 × 1014 W/cm2) and 400 nm (4 × 1014 W/cm2), respectively. Various fragment channels from molecular dication and trication were observed by coincidence momentum imaging through the measurement of their kinetic energy releases (KERs). The proton migration from different charged parent ions was analyzed from the obtained KER distributions. For the direct CE channel of CH3+ + Cl+ and CH3+ + Cl2+, the contribution of multiply excited electronic states and multicharged states is identified. In addition, the measurements of relative yields of the fragmentation channel at different laser wavelengths provide a selective control of proton migration for CH3Cl molecules in intense laser fields.
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Affiliation(s)
- Pan Ma
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Chuncheng Wang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Xiaokai Li
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Xitao Yu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Xu Tian
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Wenhui Hu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Jiaqi Yu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Sizuo Luo
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
| | - Dajun Ding
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, People's Republic of China
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17
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Sánchez JP, Aguirre NF, Díaz-Tendero S, Martín F, Alcamí M. Structure, Ionization, and Fragmentation of Neutral and Positively Charged Hydrogenated Carbon Clusters: CnHmq+ (n = 1–5, m = 1–4, q = 0–3). J Phys Chem A 2016; 120:588-605. [DOI: 10.1021/acs.jpca.5b10143] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Fernando Martín
- Instituto
Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - Manuel Alcamí
- Instituto
Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
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18
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Burger C, Kling NG, Siemering R, Alnaser AS, Bergues B, Azzeer AM, Moshammer R, de Vivie-Riedle R, Kübel M, Kling MF. Visualization of bond rearrangements in acetylene using near single-cycle laser pulses. Faraday Discuss 2016; 194:495-508. [DOI: 10.1039/c6fd00082g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The migration of hydrogen atoms resulting in the isomerization of hydrocarbons is an important process which can occur on ultrafast timescales. Here, we visualize the light-induced hydrogen migration of acetylene to vinylidene in an ionic state using two synchronized 4 fs intense laser pulses. The first pulse induces hydrogen migration, and the second is used for monitoring transient structural changes via Coulomb explosion imaging. Varying the time delay between the pulses reveals the migration dynamics with a time constant of 54 ± 4 fs as observed in the H+ + H+ + CC+ channel. Due to the high temporal resolution, vibrational wave-packet motions along the CC- and CH-bonds are observed. Even though a maximum in isomerization yield for kinetic energy releases above 16 eV is measured, we find no indication for a backwards isomerization — in contrast to previous measurements. Here, we propose an alternative explanation for the maximum in isomerization yield, namely the surpassing of the transition state to the vinylidene configuration within the excited dication state.
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Affiliation(s)
- Christian Burger
- Department of Physics
- LMU Munich
- D-85748 Garching
- Germany
- Max Planck Institute of Quantum Optics
| | - Nora G. Kling
- Department of Physics
- LMU Munich
- D-85748 Garching
- Germany
| | - Robert Siemering
- Department of Chemistry and Biochemistry
- LMU Munich
- D-81377 Munich
- Germany
| | - Ali S. Alnaser
- Max Planck Institute of Quantum Optics
- D-85748 Garching
- Germany
- Physics Department
- American University of Sharjah
| | - Boris Bergues
- Max Planck Institute of Quantum Optics
- D-85748 Garching
- Germany
| | - Abdallah M. Azzeer
- Department of Physics and Astronomy
- King-Saud University
- Riyadh 11451
- Saudi Arabia
| | - Robert Moshammer
- Max Planck Institute of Nuclear Physics
- D-69117 Heidelberg
- Germany
| | | | | | - Matthias F. Kling
- Department of Physics
- LMU Munich
- D-85748 Garching
- Germany
- Max Planck Institute of Quantum Optics
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19
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Liekhus-Schmaltz CE, Tenney I, Osipov T, Sanchez-Gonzalez A, Berrah N, Boll R, Bomme C, Bostedt C, Bozek JD, Carron S, Coffee R, Devin J, Erk B, Ferguson KR, Field RW, Foucar L, Frasinski LJ, Glownia JM, Gühr M, Kamalov A, Krzywinski J, Li H, Marangos JP, Martinez TJ, McFarland BK, Miyabe S, Murphy B, Natan A, Rolles D, Rudenko A, Siano M, Simpson ER, Spector L, Swiggers M, Walke D, Wang S, Weber T, Bucksbaum PH, Petrovic VS. Ultrafast isomerization initiated by X-ray core ionization. Nat Commun 2015; 6:8199. [DOI: 10.1038/ncomms9199] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 07/28/2015] [Indexed: 11/09/2022] Open
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20
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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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21
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Tabletop imaging of structural evolutions in chemical reactions demonstrated for the acetylene cation. Nat Commun 2014; 5:4422. [DOI: 10.1038/ncomms5422] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 06/17/2014] [Indexed: 12/29/2022] Open
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22
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Gong X, Song Q, Ji Q, Pan H, Ding J, Wu J, Zeng H. Strong-field dissociative double ionization of acetylene. PHYSICAL REVIEW LETTERS 2014; 112:243001. [PMID: 24996086 DOI: 10.1103/physrevlett.112.243001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Indexed: 05/21/2023]
Abstract
We investigate dissociative double ionization of acetylene, one of the smallest organic molecules yet with a rich electronic structure, in strong laser fields by measuring two fragment ions and two electrons in coincidence. The two-body fragmentation channels are dominated by the removal of electrons from the lower-lying molecular orbitals rather than from the highest occupied one. The electron localization-assisted enhanced ionization mechanism plays a central role for the strong-field deprotonation ionization of acetylene by releasing the second electron from the up-field potential well of the hydrogen site at the internuclear distance near twice the equilibrium value of the C-H bond.
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Affiliation(s)
- Xiaochun Gong
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Qiying Song
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Qinying Ji
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Haifeng Pan
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Jingxin Ding
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Jian Wu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Heping Zeng
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
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23
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Xie X, Doblhoff-Dier K, Xu H, Roither S, Schöffler MS, Kartashov D, Erattupuzha S, Rathje T, Paulus GG, Yamanouchi K, Baltuška A, Gräfe S, Kitzler M. Selective control over fragmentation reactions in polyatomic molecules using impulsive laser alignment. PHYSICAL REVIEW LETTERS 2014; 112:163003. [PMID: 24815647 DOI: 10.1103/physrevlett.112.163003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Indexed: 06/03/2023]
Abstract
We investigate the possibility of using molecular alignment for controlling the relative probability of individual reaction pathways in polyatomic molecules initiated by electronic processes on the few-femtosecond time scale. Using acetylene as an example, it is shown that aligning the molecular axis with respect to the polarization direction of the ionizing laser pulse does not only allow us to enhance or suppress the overall fragmentation yield of a certain fragmentation channel but, more importantly, to determine the relative probability of individual reaction pathways starting from the same parent molecular ion. We show that the achieved control over dissociation or isomerization pathways along specific nuclear degrees of freedom is based on a controlled population of associated excited dissociative electronic states in the molecular ion due to relatively enhanced ionization contributions from inner valence orbitals.
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Affiliation(s)
- Xinhua Xie
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria
| | - Katharina Doblhoff-Dier
- Institute for Theoretical Physics, Vienna University of Technology, A-1040 Vienna, Austria and Institute for Physical Chemistry, Friedrich-Schiller University Jena, D-07743 Jena, Germany
| | - Huailiang Xu
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria and State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Stefan Roither
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria
| | - Markus S Schöffler
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria
| | - Daniil Kartashov
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria
| | - Sonia Erattupuzha
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria
| | - Tim Rathje
- Institute of Optics and Quantum Electronics, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Gerhard G Paulus
- Institute of Optics and Quantum Electronics, Friedrich-Schiller-University Jena, D-07743 Jena, Germany and Helmholtz Institute Jena, D-07743 Jena, Germany
| | - Kaoru Yamanouchi
- Department of Chemistry, School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Andrius Baltuška
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria
| | - Stefanie Gräfe
- Institute for Physical Chemistry, Friedrich-Schiller University Jena, D-07743 Jena, Germany and Abbe Center of Photonics, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Markus Kitzler
- Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria
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24
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Wang Q, Dyakov YA, Wu D, Zhang D, Jin M, Liu F, Liu H, Hu Z, Ding D, Mineo H, Teranishi Y, Chao SD, Lin SH, Kosheleva O, Mebel A. Ionization/dissociation processes of methyl-substituted derivates of cyclopentanone in intense femtosecond laser field. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Mineo H, Chao SD, Kato T, Yamanouchi K. Breakdown of Born-Oppenheimer Approximation as a Physical Mechanism for Ultrafast Hydrogen Migrations in Strong Laser Driven Molecules. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Madjet MEA, Li Z, Vendrell O. Ultrafast hydrogen migration in acetylene cation driven by non-adiabatic effects. J Chem Phys 2013; 138:094311. [DOI: 10.1063/1.4793215] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Zheng Li
- Center for Free-Electron Laser Science, DESY, Notkestrasse 85, D-22607 Hamburg, Germany
- Department of Physics, University of Hamburg, D-20355 Hamburg, Germany
| | - Oriol Vendrell
- Center for Free-Electron Laser Science, DESY, Notkestrasse 85, D-22607 Hamburg, Germany
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27
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Alagia M, Callegari C, Candori P, Falcinelli S, Pirani F, Richter R, Stranges S, Vecchiocattivi F. Angular and energy distribution of fragment ions in dissociative double photoionization of acetylene molecules at 39 eV. J Chem Phys 2012; 136:204302. [DOI: 10.1063/1.4720350] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Flammini R, Satta M, Fainelli E, Avaldi L. A study of selected fragmentation paths of the ethyne dication: theory and experiment. Phys Chem Chem Phys 2011; 13:19607-14. [PMID: 21989569 DOI: 10.1039/c1cp22434d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fragmentation of the C(2)H(2)(2+) dication, formed upon inner shell ionization and the subsequent Auger decay, has been studied by means of Auger electron-ion and Auger electron-ion-ion coincidence spectroscopy at four different kinetic energies of the Auger electron. The experimental investigation of three fragmentation paths leading to the C(2)H(+)/H(+), C(2)(+)/H(+) and C(+)/H(+) pairs has been complemented by theoretical calculations of the Potential Energy Surfaces (PES). It is found that when the amount of internal energy of the dication increases this is mainly transferred into the kinetic energy of the fragments of the second step of the dissociation.
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Affiliation(s)
- R Flammini
- CNR-IMIP, Istituto di Metodologie Inorganiche e dei Plasmi, Area della Ricerca di Roma 1, via Salaria km 29.300, CP10 00016, Monterotondo Scalo (RM), Italy.
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29
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Chin CH, Lee SH. Theoretical study of isomerization and decomposition of propenal. J Chem Phys 2011; 134:044309. [DOI: 10.1063/1.3521274] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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30
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Matsuda A, Fushitani M, Takahashi EJ, Hishikawa A. Visualizing hydrogen atoms migrating in acetylene dication by time-resolved three-body and four-body Coulomb explosion imaging. Phys Chem Chem Phys 2011; 13:8697-704. [DOI: 10.1039/c0cp02333g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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31
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Jiang YH, Rudenko A, Herrwerth O, Foucar L, Kurka M, Kühnel KU, Lezius M, Kling MF, van Tilborg J, Belkacem A, Ueda K, Düsterer S, Treusch R, Schröter CD, Moshammer R, Ullrich J. Ultrafast extreme ultraviolet induced isomerization of acetylene cations. PHYSICAL REVIEW LETTERS 2010; 105:263002. [PMID: 21231652 DOI: 10.1103/physrevlett.105.263002] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Indexed: 05/21/2023]
Abstract
Ultrafast isomerization of acetylene cations ([HC=CH](+)) in the low-lying excited A(2)Σ(g)(+) state, populated by the absorption of extreme ultraviolet (XUV) photons (38 eV), has been observed at the Free Electron Laser in Hamburg, (FLASH). Recording coincident fragments C(+) + CH2(+) as a function of time between XUV-pump and -probe pulses, generated by a split-mirror device, we find an isomerization time of 52±15 fs in a kinetic energy release (KER) window of 5.8<KER<8 eV, providing clear evidence for the existence of a fast, nonradiative decay channel.
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Affiliation(s)
- Y H Jiang
- Max-Planck-Institut für Kernphysik, Heidelberg, Germany
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32
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Laksman J, Céolin D, Gisselbrecht M, Canton SE, Sorensen SL. Dynamics of proton migration and dissociation in core-excited ethyne probed by multiple ion momentum imaging. J Chem Phys 2009; 131:244305. [DOI: 10.1063/1.3270159] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Kato T, Yamanouchi K. Time-dependent multiconfiguration theory for describing molecular dynamics in diatomic-like molecules. J Chem Phys 2009; 131:164118. [DOI: 10.1063/1.3249967] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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34
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Mebel AM, Bandrauk AD. Theoretical study of unimolecular decomposition of allene cations. J Chem Phys 2009; 129:224311. [PMID: 19071920 DOI: 10.1063/1.3037204] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ab initio coupled clusters and multireference perturbation theory calculations with geometry optimization at the density functional or complete active space self-consistent-field levels have been carried out to compute ionization energies and to unravel the dissociation mechanism of allene and propyne cations, C(3)H(4)(n+) (n=1-3). The results indicate that the dominant decomposition channel of the monocation is c-C(3)H(3)(+) + H, endothermic by 37.9 kcal/mol and occurring via a barrier of 43.1 kcal/mol, with possible minor contributions from H(2)CCCH(+) + H and HCCCH(+) + H(2). For the dication, the competing reaction channels are predicted to be c-C(3)H(3)(+) + H(+), H(2)CCCH(+) + H(+), and CCCH(+) + H(3)(+), with dissociation energies of -20.5, 8.5, and 3.0 kcal/mol, respectively. The calculations reveal a H(2)-roaming mechanism for the H(3)(+) loss, where a neutral H(2) fragment is formed first, then roams around and abstracts a proton from the remaining molecular fragment before leaving the dication. According to Rice-Ramsperger-Kassel-Marcus calculations of energy-dependent rate constants for individual reaction steps, relative product yields vary with the available internal energy, with c-C(3)H(3)(+) + H(+) being the major product just above the dissociation threshold of 69.6 kcal/mol, in the energy range of 70-75 kcal/mol, and CCCH(+) + H(3)(+) taking over at higher energies. The C(3)H(4)(3+) trication is found to be not very stable, with dissociation thresholds of 18.5 and 3.7 kcal/mol for allene and propyne, respectively. Various products of Coulomb explosion of C(3)H(4)(3+), H(2)CCCH(2+) + H(+), CHCHCH(2+) + H(+), C(2)H(2)(2+) + CH(2)(+), and CCH(2)(2+) + CH(2)(+) are highly exothermic (by 98-185 kcal/mol). The tetracation of C(3)H(4) is concluded to be unstable and therefore no more than three electrons can be removed from this molecule before it falls apart. The theoretical results are compared to experimental observations of Coulomb explosions of allene and propyne.
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Affiliation(s)
- A M Mebel
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, USA.
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35
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Toledo EJ, Ramalho TC, Magriotis ZM. Influence of magnetic field on physical–chemical properties of the liquid water: Insights from experimental and theoretical models. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2008.01.010] [Citation(s) in RCA: 194] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Hishikawa A, Matsuda A, Takahashi EJ, Fushitani M. Acetylene-vinylidene isomerization in ultrashort intense laser fields studied by triple ion-coincidence momentum imaging. J Chem Phys 2008; 128:084302. [DOI: 10.1063/1.2828557] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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37
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Perić M, Palaudoux J, Hochlaf M. An ab initio study of the vibronic structure in the a1Delta g electronic state of C2H2++. J Phys Chem A 2008; 112:768-74. [PMID: 18181588 DOI: 10.1021/jp077260o] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The results of an ab initio study of the vibronic structure in the a1Deltag electronic state of C2H2++ and its deuterated species (C2D2++) are presented. They are generated employing a simple model that incorporates the minimal number of terms contributing to the Renner-Teller effect. The trans- and cis-bending potential curves at planar nuclear arrangements are obtained by means of large-scale configuration interaction calculations. The corresponding harmonic vibrational frequencies are 717 and 650 cm-1 for C2H2++, and 549 and 477 cm-1 in the case of C2D2++. It is found that the splitting of the potential surfaces is moderate at trans-distortions of linearity, while it is extremely small at cis-bending vibrations. The eigenvalues and eigenfunctions of the model Hamiltonian employed are obtained by means of a perturbative and a variational approach.
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Affiliation(s)
- M Perić
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12, 11000 Belgrade, Serbia.
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Ascenzi D, Tosi P, Roithová J, Ricketts CL, Schröder D, Lockyear JF, Parkes MA, Price SD. Generation of the organo-rare gas dications HCCRg2+ (Rg = Ar and Kr) in the reaction of acetylene dications with rare gases. Phys Chem Chem Phys 2008; 10:7121-8. [DOI: 10.1039/b810398d] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hishikawa A, Matsuda A, Fushitani M, Takahashi EJ. Visualizing recurrently migrating hydrogen in acetylene dication by intense ultrashort laser pulses. PHYSICAL REVIEW LETTERS 2007; 99:258302. [PMID: 18233560 DOI: 10.1103/physrevlett.99.258302] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Indexed: 05/13/2023]
Abstract
We demonstrate the visualization of ultrafast hydrogen migration in deuterated acetylene dication (C2D2{2+}) by employing the pump-probe Coulomb explosion imaging with sub-10-fs intense laser pulses (9 fs, 0.13 PW/cm{2}, 800 nm). It is shown, from the temporal evolution of the momenta of the fragment ions produced by the three-body explosion, C2D2{3+}-->D{+} + C{+} + CD{+}, that the migration proceeds in a recurrent manner: the deuterium atom first shifts from one carbon site to the other in a short time scale (approximately 90 fs) and then migrates back to the original carbon site by 280 fs, in competition with the molecular dissociation.
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Affiliation(s)
- Akiyoshi Hishikawa
- Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585, Japan.
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Lu HF, Li FY, Lin CC, Nagaya K, Chao I, Lin S. The fragmentation of ethanol cation under an electric field: An ab initio/RRKM study. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.06.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Palaudoux J, Hochlaf M. Butterfly C2H2++: New way for the decomposition of the acetylene dication. J Chem Phys 2007; 126:044302. [PMID: 17286465 DOI: 10.1063/1.2431642] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Using highly correlated ab initio methods, a new transition state is characterized in the lowest singlet potential energy surface of HCCH(++). This transition state possesses a dibridged (or "butterfly") form not observed yet for any acetylic compound. It can be reached either directly or after spin-orbit conversion of triplet HCCH(++) ions. In light of these calculations, a reaction pathway for the proton pair formation (i.e., HCCH(++)-->C(2)+H(+)+H(+)) is proposed.
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Affiliation(s)
- J Palaudoux
- Theoretical Chemistry Group, University of Marne-la-Vallée, Champs sur Marne, F-77454 Marne-la-Vallée, Cedex 2, France
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