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Larsen KA, Lucchese RR, Slaughter DS, Weber T. Distinguishing resonance symmetries with energy-resolved photoion angular distributions from ion-pair formation in O 2 following two-photon absorption of a 9.3 eV femtosecond pulse. J Chem Phys 2020; 153:021103. [PMID: 32668943 DOI: 10.1063/5.0013485] [Citation(s) in RCA: 2] [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 present a combined experimental and theoretical study on the photodissociation dynamics of ion-pair formation in O2 following resonant two-photon absorption of a 9.3 eV femtosecond pulse, where the resulting O+ ions are detected using 3D momentum imaging. Ion-pair formation states of Σg-3 and 3Πg symmetry are accessed through predissociation of optically dark continuum Rydberg states converging to the B Σg-2 ionic state, which are resonantly populated via a mixture of both parallel-parallel and parallel-perpendicular two-photon transitions. This mixture is evident in the angular distribution of the dissociation relative to the light polarization and varies with the kinetic energy release (KER) of the fragmenting ion pair. The KER-dependent photoion angular distribution reveals the underlying two-photon absorption dynamics involved in the ion-pair production mechanism and indicates the existence of two nearly degenerate continuum resonances possessing different symmetries, which can decay by coupling to ion-pair states of the same total symmetry through internal conversion.
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Affiliation(s)
- Kirk A Larsen
- Graduate Group in Applied Science and Technology, University of California, Berkeley, California 94720, USA
| | - Robert R Lucchese
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Daniel S Slaughter
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Thorsten Weber
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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Rockland U, Baumgärtel H, Rühl E, Lösking O, Müller H, Willner H. Ionic Fragmentation and Ion-Pair Formation in Chlorine Dioxide. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.199500011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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3
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Gao H, Pan Y, Yang L, Zhou J, Ng CY, Jackson WM. Time-slice velocity-map ion imaging studies of the photodissociation of NO in the vacuum ultraviolet region. J Chem Phys 2012; 136:134302. [DOI: 10.1063/1.3696897] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tian SX. Photoion-pair dissociation dynamics of polyatomic molecules with synchrotron radiation. Phys Chem Chem Phys 2012; 14:6433-43. [DOI: 10.1039/c2cp23763f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rühl E, Flesch R. Mechanism of anion formation in C 1s→π*-excited carbon dioxide. J Chem Phys 2004; 121:5322-7. [PMID: 15352825 DOI: 10.1063/1.1784780] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The mechanism of anion formation from core-excited carbon dioxide is investigated in the C 1s-excitation regime (280-340 eV), where negative-ion-positive-ion coincidences and negative-ion-positive-ion-positive-ion coincidences experiments are performed. O(-) formation occurs efficiently upon C 1s-->pi(*)-excitation (290.7 eV) from the singly charged cation CO(2) (+). This anion is measured in coincidence with the singly charged atoms C(+) and O(+). The formation of atomic cations is accompanied by a substantial kinetic energy release. This suggests that an intermediate CO(++) is formed together with O(-), where the dication decays via fission. The results are discussed in terms of an anion formation mechanism from core-excited molecules considering previous experimental results.
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Affiliation(s)
- E Rühl
- Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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Wen CR, Chou LC. Photon-stimulated desorption of F(-) ions from CF(3)Cl adsorbed on Si(111)-7x7. J Chem Phys 2004; 120:11144-54. [PMID: 15268144 DOI: 10.1063/1.1738638] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We report the photon-stimulated desorption of negative ions induced by direct dipolar dissociation and dissociative electron attachment. The photon-stimulated desorption of F(-) ions from CF(3)Cl physisorbed on a Si(111)-7x7 surface at 30 K in the photon energy range 12-35 eV was studied. The F(-) ion yield exhibits four resonances, at 12.8, 16.2, 19.5, and 22.3 eV, quite unlike the gas phase photodissociation cross section. The intensities of these resonances depend strongly on the CF(3)Cl coverage in a manner which varies from peak to peak. The resonances at 19.5 and 22.3 eV, which have a significant enhancement in the monolayer regime, are due to electron mediated dipolar dissociation of adsorbed CF(3)Cl molecules. The enhancement is attributed to surface electron attachment following molecular excitation. A significant enhancement in the monolayer regime has also been observed for the resonances at 12.8 and 16.2 eV. These two resonances are ascribable to a combination of electron mediated dipolar dissociation and dissociative electron attachment driven by photoelectrons generated in the neighboring molecules.
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Affiliation(s)
- C-R Wen
- Department of Physics, National Cheng Kung University, Tainan, Taiwan.
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Ervin KM. Experimental Techniques in Gas-Phase Ion Thermochemistry. (Chem. Rev. 2001, 101, 391−444. Published on the Web January 24, 2001). Chem Rev 2002. [DOI: 10.1021/cr010045y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Hikosaka Y, Eland JH. New results on photoion pair formation from application of the velocity imaging photoionisation coincidence technique. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2000; 14:2305-2311. [PMID: 11114042 DOI: 10.1002/1097-0231(20001215)14:23<2305::aid-rcm167>3.0.co;2-i] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The velocity imaging photoionisation coincidence (VIPCO) technique is shown to be a powerful tool for studies of ion pair formation. Sequential mechanisms are demonstrated for some three-body ion pair formation reactions. Observation of a new type of reaction producing one negatively and two positively charged ions plus an electron is reported.
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Affiliation(s)
- Y Hikosaka
- Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, UK
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Hayaishi T, Iida Y, Morioka Y, Sasanuma M, Ishiguro E, Nakamura M. Photoionisation mass spectrometry of O2in the VUV region. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/19/18/016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hikosaka Y, Hattori H, Hikida T, Mitsuke K. Formation of autoionizing atomic nitrogen from superexcited states of nitric oxide. J Chem Phys 1996. [DOI: 10.1063/1.472489] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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12
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Affiliation(s)
- Eckart Rühl
- Institut für Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustr. 3, D-14195 Berlin, Germany
- Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - Hans-Werner Jochims
- Institut für Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustr. 3, D-14195 Berlin, Germany
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Siller L, Bennett SL, MacDonald MA, Bennett RA, Palmer RE, Foord JS. Surface enhanced photodissociation of physisorbed molecules. PHYSICAL REVIEW LETTERS 1996; 76:1960-1963. [PMID: 10060564 DOI: 10.1103/physrevlett.76.1960] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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14
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Competing photodissociation pathways for physisorbed O2/graphite investigated using Ar spacer layers. Chem Phys Lett 1995. [DOI: 10.1016/s0009-2614(95)01233-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Erman P, Karawajczyk A, Rachlew‐Källne E, Strömholm C. Photoionization and photodissociation of nitric oxide in the range 9–35 eV. J Chem Phys 1995. [DOI: 10.1063/1.468616] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Synchrotron radiation induced photoionization and photodissociation of carbon monoxide in the 14?35 eV region. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/bf01426396] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yoshida H, Mitsuke K. Observation of doubly excited Rydberg states of N2O by positive ion–negative ion coincidence spectroscopy. J Chem Phys 1994. [DOI: 10.1063/1.466736] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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A study of the absolute photoabsorption, photoionization and photodissociation cross sections and the photoionization quantum efficiency of oxygen from the ionization threshold to 490 Å. Chem Phys 1993. [DOI: 10.1016/0301-0104(93)80148-3] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Bennett R, Sharpe R, Guest R, Barnard J, Palmer R, MacDonald M. Resonant substrate-mediated photodissociation of adsorbed molecules: O2/graphite. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)90079-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Dujardin G, Hellner L, Philippe L, Azria R, Besnard-Ramage MJ. Photon-stimulated charge transfer in condensed O2 studied by negative-ion desorption. PHYSICAL REVIEW LETTERS 1991; 67:1844-1847. [PMID: 10044265 DOI: 10.1103/physrevlett.67.1844] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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22
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Dadouch A, Dujardin G, Hellner L, Besnard-Ramage MJ, Olsson BJ. Highly excited quasistable states of neutral CO lying up to the double-ionization-energy level. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 43:6057-6065. [PMID: 9904938 DOI: 10.1103/physreva.43.6057] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Mitsuke K, Suzuki S, Imamura T, Koyano I. Negative‐ion mass spectrometric study of ion‐pair formation in the vacuum ultraviolet. IV. CH4→H−+CH+3 and CD4→D−+CD+3. J Chem Phys 1991. [DOI: 10.1063/1.460435] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mitsuke K, Suzuki S, Imamura T, Koyano I. Negative‐ion mass spectrometric study of ion‐pair formation in the vacuum ultraviolet. III. SF6→F−+SF+5. J Chem Phys 1990. [DOI: 10.1063/1.459259] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Mitsuke K, Suzuki S, Imamura T, Koyano I. Negative‐ion mass spectrometric study of ion‐pair formation in the vacuum ultraviolet. II. OCS→S−+CO+, O−+CS+, and CO2→O−+CO+. J Chem Phys 1990. [DOI: 10.1063/1.459098] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mitsuke K, Suzuki S, Imamura T, Koyano I. Negative‐ion mass spectrometric study of ion pair formation in the vacuum ultraviolet. I. N2O→O−+N+2. J Chem Phys 1990. [DOI: 10.1063/1.458291] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dujardin G, Hellner L, Olsson BJ, Besnard-Ramage MJ, Dadouch A. Negative-fragment-ion formation by photon excitation of molecules in the vicinity of their core-ionization and direct-double-ionization thresholds. PHYSICAL REVIEW LETTERS 1989; 62:745-748. [PMID: 10040322 DOI: 10.1103/physrevlett.62.745] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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28
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Southworth SH, Parr AC, Hardis JE, Dehmer JL. Resonance structure in the vibrationally resolved photoelectron branching ratios and angular distributions of the 2π−1channel of NO. J Chem Phys 1987. [DOI: 10.1063/1.453680] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Baumgärtel H, Jochims HW, Brutschy B. Die Anwendung von Synchrotronstrahlung zur Untersuchung physikalischer-chemischer Probleme. Z PHYS CHEM 1987. [DOI: 10.1524/zpch.1987.154.part_1_2.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bombach R, Schmelzer A, Stadelmann JP. Predissociation of the molecular oxygen cations 16O2+ and 18O2+ studied by photoelectron-photoion coincidence spectroscopy. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/0020-7381(82)80008-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Linn SH, Ono Y, Ng CY. A study of the ion–molecule half reactions O+2(ã4Πu,v)⋅⋅⋅(O2)m→O+2m+1+O,m= 1, 2, or 3, using the molecular beam photoionization method. J Chem Phys 1981. [DOI: 10.1063/1.441487] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Elementary Attachment and Detachment Processes. II. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/s0065-2539(08)60362-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
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