1
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Fehre K, Eckart S, Kunitski M, Janke C, Trabert D, Hofmann M, Rist J, Weller M, Hartung A, Schmidt LPH, Jahnke T, Braun H, Baumert T, Stohner J, Demekhin PV, Schöffler MS, Dörner R. Strong Differential Photoion Circular Dichroism in Strong-Field Ionization of Chiral Molecules. PHYSICAL REVIEW LETTERS 2021; 126:083201. [PMID: 33709766 DOI: 10.1103/physrevlett.126.083201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
We investigate the differential ionization probability of chiral molecules in the strong-field regime as a function of the helicity of the incident light. To this end, we analyze the fourfold ionization of bromochlorofluoromethane (CHBrClF) with subsequent fragmentation into four charged fragments and different dissociation channels of the singly ionized methyloxirane. By resolving for the molecular orientation, we show that the photoion circular dichroism signal strength is increased by 2 orders of magnitude.
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Affiliation(s)
- K Fehre
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - S Eckart
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - M Kunitski
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - C Janke
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - D Trabert
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - M Hofmann
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - J Rist
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - M Weller
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - A Hartung
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - L Ph H Schmidt
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - T Jahnke
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - H Braun
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - T Baumert
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - J Stohner
- ZHAW Zurich University for Applied Sciences, Department N, Campus Reidbach, Research Group Physical Chemistry Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
| | - Ph V Demekhin
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - M S Schöffler
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
| | - R Dörner
- Institut für Kernphysik, Goethe-Universität, Frankfurt Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
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Gutsev GL, López Peña HA, McPherson SL, Boateng DA, Ramachandran BR, Gutsev LG, Tibbetts KM. From Neutral Aniline to Aniline Trication: A Computational and Experimental Study. J Phys Chem A 2020; 124:3120-3134. [PMID: 32233368 DOI: 10.1021/acs.jpca.0c00686] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report density functional theory computations and photoionization mass spectrometry measurements of aniline and its positively charged ions. The geometrical structures and properties of the neutral and singly, doubly, and triply positively charged aniline are computed using density functional theory with the generalized gradient approximation. At each charge, there are multiple isomers closely spaced in total energy. Whereas the lowest energy states of both neutral and cation have the same topology C6H5-NH2, the dication and trication have the C5NH5-CH2 topology with the nitrogen atom in the meta- and para-positions, respectively. We compute the dissociation pathways of all four charge states to NH or NH+ and NH2 or NH2+, depending on the initial charge of the aniline precursor. Dissociation leading to the formation of NH (from the neutral and cation) and NH+ (from the dication and trication) proceeds through multiple transition states. On the contrary, the dissociation of NH2 (from the neutral and cation) and NH2+ (from the dication and trication) is found to proceed without an activation energy barrier. The trication was found to be stable toward abstraction on NH+ and NH2+ by 0.96 and 0.18 eV, respectively, whereas the proton affinity of the trication is substantially higher, 1.98 eV. The mass spectra of aniline were recorded with 1300 nm, 20 fs pulses over the peak intensity range of 1 × 1013 to 3 × 1014 W cm-2. The analysis of the mass spectra suggests high stability of both dication and trication to fragmentation. The formation of the fragment NH+ and NH2+ ions is found to proceed via Coulomb explosion.
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Affiliation(s)
- G L Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
| | - H A López Peña
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - S L McPherson
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - D Ampadu Boateng
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - B R Ramachandran
- Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States
| | - L G Gutsev
- Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States.,Institute of Problems of Chemical Physics of Russian Academy of Sciences, Chernogolovka, Moscow District 142432, Russia
| | - K M Tibbetts
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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Multiple strong field ionization of metallocenes: Applicability of ADK rates to the production of multiply charged transition metal (Cr, Fe, Ni, Ru, Os) cations. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.10.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Ampadu Boateng D, Gutsev GL, Jena P, Tibbetts KM. Dissociation dynamics of 3- and 4-nitrotoluene radical cations: Coherently driven C–NO2bond homolysis. J Chem Phys 2018; 148:134305. [DOI: 10.1063/1.5024892] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Derrick Ampadu Boateng
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, USA
| | - Gennady L. Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, USA
| | - Puru Jena
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, USA
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Yatsuhashi T, Nakashima N. Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2018. [DOI: 10.1016/j.jphotochemrev.2017.12.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Gutsev GL, Ampadu Boateng D, Jena P, Tibbetts KM. A Theoretical and Mass Spectrometry Study of Dimethyl Methylphosphonate: New Isomers and Cation Decay Channels in an Intense Femtosecond Laser Field. J Phys Chem A 2017; 121:8414-8424. [PMID: 29035556 DOI: 10.1021/acs.jpca.7b08889] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Using both mass spectrometry with intense femtosecond laser ionization and high-level computational methods, we have explored the structure and fragmentation patterns of dimethyl methylphosphonate (DMMP) cation. Extensive search of the geometries of both neutral and positively charged DMMP yields new isomers that are appreciably lower in total energy than those commonly synthesized using the Michaelis-Arbuzov reaction. The stability of the standard isomer with CH3PO(OCH3)2 topology is found to be due to the presence of high barriers to isomer interconversion that involves several transition states. Our femtosecond laser ionization experiments show that the relative yields of the major dissociation products as a function of peak laser intensity correlate well with the theoretical estimates for the energies of the DMMP+ decay via various channels. In contrast, the peak laser intensities required for observation of minor dissociation products exhibit no correlation with the computed decay energies, which suggests that barrier heights and/or excited electronic states of DMMP+ determine its preferred fragmentation pathways in an intense femtosecond laser field.
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Affiliation(s)
- G L Gutsev
- Department of Physics, Florida A&M University , Tallahassee, Florida 32307, United States
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Kitashoji A, Yoshikawa T, Fujihara A, Kamamori T, Nashima S, Yatsuhashi T. Selection of a Single Isotope of Multiply Charged Xenon ( A Xe z+ , A=128-136, z=1-6) by Using a Bradbury-Nielsen Ion Gate. Chemphyschem 2017; 18:2007-2011. [PMID: 28605574 DOI: 10.1002/cphc.201700381] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/15/2017] [Indexed: 11/09/2022]
Abstract
The inclusion of an ion gate in a tandem mass spectrometer allows a specific precursor ion to be selected, and the fragment ions are then used for structure analysis and to investigate chemical reactions. However, the performance of an ion gate has been judged simply by whether or not the target ion was selected. In this study, we designed, manufactured, constructed, and characterized a Bradbury-Nielsen ion gate (BNG). The actual ion selection ability, i.e. the gate function, of the BNG was measured for isotopes of Xez+ (z=1-6). The gate function of the BNG was 36.5±0.5 ns in width and 3-13 ns in rise and fall times. The BNG provides a simple way to select multiply charged molecular cations of small organic molecules as well as large molecules such as proteins and peptides.
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Affiliation(s)
- Akihiro Kitashoji
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Taiki Yoshikawa
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Akimasa Fujihara
- Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Osaka, 599-8531, Japan
| | - Takaaki Kamamori
- Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Shigeki Nashima
- Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Tomoyuki Yatsuhashi
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
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8
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Yamazaki T, Watanabe Y, Kanya R, Yamanouchi K. Decomposition of cyclohexane ion induced by intense femtosecond laser fields by ion-trap time-of-flight mass spectrometry. J Chem Phys 2016; 144:024313. [DOI: 10.1063/1.4939769] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Takao Yamazaki
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yusuke Watanabe
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Reika Kanya
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kaoru Yamanouchi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- NANOQUINE, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Bohinski T, Moore Tibbetts K, Tarazkar M, Romanov DA, Matsika S, Levis RJ. Strong Field Adiabatic Ionization Prepares a Launch State for Coherent Control. J Phys Chem Lett 2014; 5:4305-4309. [PMID: 26273978 DOI: 10.1021/jz502313f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate that excitation of acetophenone with a strong field, near-infrared femtosecond pulse (1150-1500 nm) results in adiabatic ionization, producing acetophenone radical cation in the ground electronic state. The time-resolved transients of the parent and fragment ions probed with a weak 790 nm pulse reveal an order of magnitude enhancement of the peak-to-peak amplitude oscillations, ∼ 100 fs longer coherence time, and an order of magnitude increase in the ratio of parent to fragment ions in comparison with nonadiabatic ionization with a strong field 790 nm pulse. Equation of motion coupled cluster and classical wavepacket trajectory calculations support the mechanism wherein the probe pulse excites a wavepacket on the ground surface D0 to the excited D2 surface at a delay of 325 fs, resulting in dissociation to the benzoyl ion. Direct population transfer to the D2 state within the duration of a 1370 nm pump pulse eliminates wavepacket oscillation on the D0 state.
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Affiliation(s)
- Timothy Bohinski
- †Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
- ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Katharine Moore Tibbetts
- †Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
- ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Maryam Tarazkar
- †Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
- ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Dmitri A Romanov
- ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
- §Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Spiridoula Matsika
- †Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Robert J Levis
- †Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
- ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
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10
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Bohinski T, Moore Tibbetts K, Munkerup K, Tarazkar M, Romanov DA, Matsika S, Levis RJ. Radical cation spectroscopy of substituted alkyl phenyl ketones via tunnel ionization. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.05.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Moore Tibbetts K, Xing X, Rabitz H. Systematic Trends in Photonic Reagent Induced Reactions in a Homologous Chemical Family. J Phys Chem A 2013; 117:8205-15. [DOI: 10.1021/jp403824h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Xi Xing
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544,
United States
| | - Herschel Rabitz
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544,
United States
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12
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Yan L, Cudry F, Li W, Suits AG. Isomer-Specific Mass Spectrometric Detection Via “Semisoft” Strong-Field Ionization. J Phys Chem A 2013; 117:11890-5. [DOI: 10.1021/jp403118c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Lu Yan
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
| | - Fadia Cudry
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
| | - Wen Li
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
| | - Arthur G. Suits
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
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13
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Yatsuhashi T, Nakashima N, Azuma J. Coulomb Explosion of Dichloroethene Geometric Isomers at 1 PW cm–2. J Phys Chem A 2013; 117:1393-9. [DOI: 10.1021/jp310361x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Tomoyuki Yatsuhashi
- PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi,
Saitama, 332-0012 Japan
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14
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Hoshina K, Hagihara H, Tsuge M. Double Ionization and Coulomb Explosion of the Formic Acid Dimer by Intense Near-Infrared Femtosecond Laser Pulses. J Phys Chem A 2012; 116:826-31. [DOI: 10.1021/jp2111154] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kennosuke Hoshina
- Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1, Higashijima, Akiha-ku, Niigata-city 956-8603, Japan
| | - Hiroshi Hagihara
- Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1, Higashijima, Akiha-ku, Niigata-city 956-8603, Japan
| | - Masashi Tsuge
- Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1, Higashijima, Akiha-ku, Niigata-city 956-8603, Japan
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Goto M, Hansen K. Competitive ionization processes of anthracene excited with a femtosecond pulse in the multi-photon ionization regime. J Chem Phys 2011; 135:214310. [DOI: 10.1063/1.3663618] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Holm AIS, Johansson HAB, Cederquist H, Zettergren H. Dissociation and multiple ionization energies for five polycyclic aromatic hydrocarbon molecules. J Chem Phys 2011; 134:044301. [DOI: 10.1063/1.3541252] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Yatsuhashi T, Murakami E, Nakashima N. Fez+ (z = 1–6) generation from ferrocene. Phys Chem Chem Phys 2011; 13:4234-8. [DOI: 10.1039/c0cp02122a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Yatsuhashi T, Nakashima N. Dissociation and Multiply Charged Silicon Ejection in High Abundance from Hexamethyldisilane. J Phys Chem A 2010; 114:11890-5. [DOI: 10.1021/jp1067186] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan, and PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama, 332-0012 Japan
| | - Nobuaki Nakashima
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan, and PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama, 332-0012 Japan
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Kjellberg M, Bulgakov AV, Goto M, Johansson O, Hansen K. Femtosecond electron spectroscopy of coronene, benzo[GHI]perylene, and anthracene. J Chem Phys 2010; 133:074308. [DOI: 10.1063/1.3466925] [Citation(s) in RCA: 15] [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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Yatsuhashi T, Nakashima N. Formation and Fragmentation of Quadruply Charged Molecular Ions by Intense Femtosecond Laser Pulses. J Phys Chem A 2010; 114:7445-52. [DOI: 10.1021/jp103725s] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan, and PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama, 332-0012 Japan
| | - Nobuaki Nakashima
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan, and PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama, 332-0012 Japan
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21
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Tanaka M, Kawaji M, Yatsuhashi T, Nakashima N. Ionization and Fragmentation of Alkylphenols by 0.8−1.5 μm Femtosecond Laser Pulses. J Phys Chem A 2009; 113:12056-62. [DOI: 10.1021/jp902557v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michinori Tanaka
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Mariko Kawaji
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Nobuaki Nakashima
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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Liu M, Wu C, Wu Z, Liang Q, Deng Y, Gong Q, Sun Y, Xu Y, Zhao Y, Shan X, Liu F, Sheng L. Mass spectra of methyl acetate and ethyl formate. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.12.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Yatsuhashi T, Nakashima N. Explosive Desorption and Fragmentation of Molecular Ion from Solid Fullerene by Intense Nonresonant Femtosecond Laser Pulses. J Phys Chem A 2008; 112:5781-5. [DOI: 10.1021/jp8023028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan
| | - Nobuaki Nakashima
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585 Japan
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24
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Zyubina TS, Mebel AM, Hayashi M, Lin SH. Theoretical study of multiphoton ionization of cyclohexadienes and unimolecular decomposition of their mono- and dications. Phys Chem Chem Phys 2008; 10:2321-31. [DOI: 10.1039/b719979a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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25
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Tanaka M, Murakami M, Yatsuhashi T, Nakashima N. Atomiclike ionization and fragmentation of a series of CH3–X (X: H, F, Cl, Br, I, and CN) by an intense femtosecond laser. J Chem Phys 2007; 127:104314. [PMID: 17867754 DOI: 10.1063/1.2764078] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Methane derivatives of CH(3)-X (X: H, F, Cl, Br, I, and CN) were ionized and fragmented by an intense femtosecond laser with a 40 fs pulse at 0.8 microm in intensities of 10(13)-10(15) W cm(-2). The curves of the ionization yields of CH(3)-X versus laser intensities have been found to be fitted with an atomic ionization theory (the theory of Perelomov, Popov, and Terent'ev) that has been established to reproduce experimental results well for rare gas atoms. The saturation intensities have been reproduced within a factor of 1.6 of the calculated ones. For molecules with low ionization potentials such as amines, another atomic ionization theory (the theory of Ammosov, Delone, and Krainov) reproduced the saturation intensities. The atomiclike ionization behavior of molecules indicates that the fragmentation occurs after the ionization. The fragmentation mechanisms after the ionization of some molecular ions are discussed.
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Affiliation(s)
- Michinori Tanaka
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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Mathur D, Rajgara FA, Dharmadhikari AK. White-Light-Induced Fragmentation of Methane. J Phys Chem A 2007; 111:9399-404. [PMID: 17715903 DOI: 10.1021/jp0732458] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We experimentally probe molecular ionization and dissociation of methane molecules in the gas phase upon their irradiation by intense pulses of white light that spans the wavelength range 500-850 nm. White light pulses are generated upon irradiation of BK7 glass by 36-fs-long pulses of intense 820 nm laser light. Comparison is made of the molecular fragmentation patterns obtained using white light that is depolarized with those obtained using single-color (820 nm) light that is highly chirped. On the basis of such comparison, we make hitherto-unavailable estimates of the in situ intensity of white light pulses. Results obtained using white light also indicate that resonances apparently do not play any role in the ionization dynamics that ensue upon irradiation by intense, broadband light; neither are the dynamics affected by the polarization properties of the 820 nm light that is used to generate the white light.
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Affiliation(s)
- Deepak Mathur
- Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005, India.
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Wu D, Wang Q, Cheng X, Jin M, Li X, Hu Z, Ding D. Effect of Cation Absorption on Ionization/Dissociation of Cycloketone Molecules in a Femtosecond Laser Field. J Phys Chem A 2007; 111:9494-8. [PMID: 17711268 DOI: 10.1021/jp073313q] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mass spectra of a series of cycloketone molecules, cyclopentanone (CPO), cyclohexanone (CHO), cycloheptanone (CHPO), and cyclooctanone (COO) are measured in a 788 or 394 nm laser field with 90 fs pulse duration and the intensity ranging from 5 x 10(13) W/cm(2) to 2 x 10(14) W/cm(2). At 788 nm, a dominated parent ion peak and some weak peaks from the fragment ions C(n)H(m)+ are observed for CPO and CHO (a ratio P(+)/T(+), the parent ion yield to the total ion yield, is 81.6% and 52.6%, respectively). But the extensive fragment ion peaks are observed with the greatly reduced parent ion peak for CHPO (P(+)/T(+) = 5.5%) and that are even hard to be identified for COO. These observations are interpreted explicitly in the frame of the significant resonant effect of their cation photoabsorption on ionization and dissociation of these molecules. The present work also suggests that a nonadiabatic ionization occurs with a nuclear rearrangement due to the H movement in these molecules during the ionization in an intense femtosecond laser field.
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Affiliation(s)
- Di Wu
- Institute of Atomic and Molecular Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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Yatsuhashi T, Murakami M, Nakashima N. Anisotropic bulletlike emission of terminal ethynyl fragment ions: Ionization of ethynylbenzene-d under intense femtosecond laser fields. J Chem Phys 2007; 126:194316. [PMID: 17523813 DOI: 10.1063/1.2738468] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The authors investigated Coulomb explosions of ethynylbenzenes under intense femtosecond laser fields. Deuteration on the edge of the triple bond gave information about specific fragment emissions and the contribution of hydrogen migration. Some fragments not resulting from migration were emitted in the direction of laser polarization. These were ethynyl fragment ions (D(+), CD(+), C(2)D(+), and C(3)D(+)). Although two bonds have to be cleaved to produce C(3)D(+), the rigid character of the triple bond was maintained in the Coulomb explosion process. In contrast, fragment ions, which are formed after single or double hydrogen migration, showed isotropic emissions with distinct kinetic energies. The character of the substituents has been found to hold even under strong laser light fields where violent fragmentation took place. The ethynyl parts were emitted like bullets from the molecular frame of ethynylbenzene despite the explosion into pieces of the main body of benzene ring.
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Affiliation(s)
- Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
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Apatin VM, Kompanets VO, Laptev VB, Matveets YA, Ryabov EA, Chekalin SV, Letokhov VS. Excitation and dissociation of polyatomic molecules under the action of femtosecond infrared laser pulses. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2007. [DOI: 10.1134/s1990793107020054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Murakami M, Tanaka M, Yatsuhashi T, Nakashima N. Enhancement of anthracene fragmentation by circularly polarized intense femtosecond laser pulse. J Chem Phys 2007; 126:104304. [PMID: 17362065 DOI: 10.1063/1.2713107] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The authors compared circularly and linearly polarized lights in the ionization and fragmentation of anthracene, using 800 nm femtosecond laser pulses at intensities of 10(13)-10(15) W cm-2. Singly and doubly charged intact molecular ions as well as numerous fragment ions were observed in the mass spectra, which were investigated as a function of laser intensity and polarization. At comparable intensities above the saturation threshold for complete ionization, the fragmentation pathways are enhanced with a circularly polarized field compared to a linearly polarized field. Resonant excitation of the molecular cation through the 2Au<--2Bg transition is proposed to be the initial step to ion fragmentation. The circularly polarized field interacts with a larger fraction of the randomly oriented molecules than the linearly polarized field, and this is considered to be the reason for the enhanced fragmentation brought about by circularly polarized light.
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Affiliation(s)
- Masanao Murakami
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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Laarmann T, Shchatsinin I, Stalmashonak A, Boyle M, Zhavoronkov N, Handt J, Schmidt R, Schulz CP, Hertel IV. Control of giant breathing motion in c60 with temporally shaped laser pulses. PHYSICAL REVIEW LETTERS 2007; 98:058302. [PMID: 17358909 DOI: 10.1103/physrevlett.98.058302] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2006] [Indexed: 05/14/2023]
Abstract
Femtosecond laser pulses tailored with closed-loop, optimal control feedback were used to excite oscillations in C60 with large amplitude by coherent heating of nuclear motion. A characteristic pulse sequence results in significant enhancement of C2 evaporation, a typical energy loss channel of vibrationally hot C60. The separation between subsequent pulses in combination with complementary two-color pump-probe data and time-dependent density functional theory calculations give direct information on the multielectron excitation via the t(1g) resonance followed by efficient coupling to the radial symmetric a(g)(1) breathing mode.
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Affiliation(s)
- T Laarmann
- Max Born Institute, Max-Born-Strasse 2a, D-12489 Berlin, Germany.
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Shchatsinin I, Laarmann T, Stibenz G, Steinmeyer G, Stalmashonak A, Zhavoronkov N, Schulz CP, Hertel IV. C60 in intense short pulse laser fields down to 9fs: Excitation on time scales below e-e and e-phonon coupling. J Chem Phys 2006; 125:194320. [PMID: 17129116 DOI: 10.1063/1.2362817] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The interaction of C60 fullerenes with 765-797 nm laser pulses as short as 9 fs at intensities of up to 3.7 x 10(14) W cm(-2) is investigated with photoion spectroscopy. The excitation time thus addressed lies well below the characteristic time scales for electron-electron and electron-phonon couplings. Thus, energy deposition into the system is separated from energy redistribution among the various electronic and nuclear degrees of freedom. Insight into fundamental photoinduced processes such as ionization and fragmentation is obtained from the analysis of the resulting mass spectra as a function of pulse duration, laser intensity, and time delay between pump and probe pulses, the latter revealing a memory effect for storing electronic energy in the system with a relaxation time of about 50 fs. Saturation intensities and relative abundances of (multiply charged) parent and fragment ions (C60(q+), q=1-6) are fingerprints for the ionization and fragmentation mechanisms. The observations indicate that for final charge states q>1 the well known C60 giant plasmon resonance is involved in creating ions and a significant amount of large fragments even with 9 fs pulses through a nonadiabatic multielectron dynamics. In contrast, for energetic reasons singly charged ions are generated by an essentially adiabatic single active electron mechanism and negligible fragmentation is found when 9 fs pulses are used. These findings promise to unravel a long standing puzzle in understanding C60 mass spectra generated by intense femtosecond laser pulses.
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Tanaka M, Panja S, Murakami M, Yatsuhashi T, Nakashima N. Intact molecular ion formation of cyclohexane and 2,3-dimethyl-1,3-butadiene by excitation with a short, intense femtosecond laser pulse. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.06.065] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yatsuhashi T, Obayashi T, Tanaka M, Murakami M, Nakashima N. Femtosecond Laser Ionization of Organic Amines with Very Low Ionization Potentials: Relatively Small Suppressed Ionization Features. J Phys Chem A 2006; 110:7763-71. [PMID: 16789760 DOI: 10.1021/jp0619989] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We examined the femtosecond nonresonant ionization of organic amines with vertical ionization potentials as low as 5.95 eV. The quantitative evaluation of suppressed ionization relative to the single active electron approximation model was done by comparing the saturation intensity, I(sat), in experiments and theory. ADK theory was found to be useful in predicting the ionization yield in the I(sat) scale within a factor of 2, even for molecules with very low ionization potentials. The degree of suppression was, however, smaller than that of benzene. The localization of electrons on the nitrogen atom was found to affect the ionization behavior under the strong laser field. The delocalized pi electrons in benzene could not follow the laser field adiabatically, while those in localized molecular orbitals could. In addition, the growth of a tunneling barrier due to the screening effect in amines may be relatively smaller than that in benzene.
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Affiliation(s)
- Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Japan.
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Yatsuhashi T, Nakashima N. Effects of Polarization of 1.4 μm Femtosecond Laser Pulses on the Formation and Fragmentation of Naphthalene Molecular Ions Compared at the Same Effective Ionization Intensity. J Phys Chem A 2005; 109:9414-8. [PMID: 16866389 DOI: 10.1021/jp053868q] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Naphthalene was ionized with 130 fs pulses of different polarizations at 1.4 microm. In contrast to the results of ionization by 0.8 microm pulses, fragmentation was dramatically suppressed and naphthalene molecular ions of up to 3+ were produced. The use of this simple model of ionization and large electron kinetic energy enabled us to study the electron-recollision-induced fragmentation and/or double ionization more precisely. The failure of the theoretical prediction of ion yield for the case of naphthalene prevented us from judging the electron recollision solely by a comparison with theoretical curves. Therefore, the effects of laser polarization on the ratios between differently charged states and between molecular and total ions were compared at the same effective (peak) intensity instead of average intensity. Comparison under the same effective intensity enabled us to identify the effects of ellipticity clearly. Evidence of the electron recollision was found in the doubly charged molecular ion formation but not in the fragmentation. The single-electron recollision event was not sufficient to induce fragmentation because of its low energy transfer efficiency. We concluded that the fragmentation originated in the unstable nature of the highly charged molecular ion itself and in the Coulomb explosion in the case of naphthalene.
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Affiliation(s)
- Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
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Boyle M, Laarmann T, Shchatsinin I, Schulz CP, Hertel IV. Fragmentation dynamics of fullerenes in intense femtosecond-laser fields: Loss of small neutral fragments on a picosecond time scale. J Chem Phys 2005; 122:181103. [PMID: 15918684 DOI: 10.1063/1.1903949] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The fragmentation dynamics of C60 irradiated with intense femtosecond laser pulses is studied with one-color pump-probe spectroscopy. Small neutral fragments (C, C2, and C3) are formed by an 800-nm pump pulse which are then postionized by a delayed probe pulse. The respective ion signals detected by the time-of-flight mass spectrometry dramatically increase on a time scale of 10-20 ps.
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Affiliation(s)
- M Boyle
- Max Born Institute, Max-Born-Strasse 2A, 12489 Berlin, Germany
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