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Pranszke B. Charge-transfer excitation in collisions of He+ ions with CO2 molecules under beam conditions. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.03.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Zhang C, Li J, Zhang Q, Chen Y, Huang C, Yang X. Mode specific photodissociation of CS2+via the A2Πu state: a time-sliced velocity map imaging study. Phys Chem Chem Phys 2012; 14:2468-74. [DOI: 10.1039/c2cp22385f] [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]
Affiliation(s)
- Cuimei Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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Charge-transfer excitation in collisions of slow H+ and ions with CO2 molecules under beam conditions. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.04.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li J, Zhang C, Zhang Q, Chen Y, Huang C, Yang X. [1 + 1] photodissociation of CS(2)(+)(X̃2Π(g)) via the vibrationally mediated B̃2Σ(u)+ state: multichannels exhibiting and mode specific dynamics. J Chem Phys 2011; 134:114309. [PMID: 21428621 DOI: 10.1063/1.3567071] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dissociation dynamics of CS(2)(+) vibrationally mediated via its B̃(2)Σ(u)(+) state, was studied using the time-sliced velocity map imaging technique. The parent CS(2)(+) cation was prepared in its X̃(2)Π(g) ground state through a [3 + 1] resonance enhanced multiphoton ionization process, via the 4pσ(3)Π(u) intermediate Rydberg state of neutral CS(2) molecule at 483.14 nm. CS(2)(+)(X̃(2)Π(g)) was dissociated by a [1 + 1] photoexcitation mediated via the vibrationally selected B̃ state over a wavelength range of 267-283 nm. At these wavelengths the C̃(2)Σ(g)(+) and D̃(2)Σ(u)(+) states are excited, followed by numerous S(+) and CS(+) dissociation channels. The S(+) channels specified as three distinct regions were shown with vibrationally resolved structures, in contrast to the less-resolved structures being presented in the CS(+) channels. The average translational energy releases were obtained, and the S(+)∕CS(+) branching ratios with mode specificity were measured. Two types of dissociation mechanisms are proposed. One mechanism is the direct coupling of the C̃ and D̃ states with the repulsive satellite states leading to the fast photofragmentation. The other mechanism is the internal conversion of the C̃ and D̃ states to the B̃ state, followed by the slow fragmentation occurred via the coupling with the repulsive satellite states.
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Affiliation(s)
- Jialin Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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A comparison of the charge transfer and collisional activation processes in collisions between keV He+ and CO2. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.10.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Poon C, Mayer PM. Should a Franck-Condon or a curve-crossing picture be applied to ion-target collisional activation? A study of keV CO2+*/He collisions by emission spectroscopy. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:1551-1558. [PMID: 18657444 DOI: 10.1016/j.jasms.2008.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Revised: 06/12/2008] [Accepted: 06/13/2008] [Indexed: 05/26/2023]
Abstract
Collision-induced photon emissions (CIE) were observed for keV CO(2)(+*)/He collisions from 190 to 1020 nm. The emissions were assigned to the Deltanu=0 band of the CO(2)(+*) B (2)Sigma(u)(+) --> X (2)Pi(g) electronic transition and the Deltanu= +3, +2, +1, 0, -1, -2, -3 vibrational transition progression in the CO(2)(+*) A (2)Pi(u) --> X (2)Pi(g) electronic transition. The other peaks arise from the emissions of excited O* fragment atoms and the target gas. The relative intensities of the CO(2)(+*) and O* emissions are independent of the ion translational energy above 3 keV, supporting the curve-crossing mechanism for collisional excitation. Investigation of the relative intensities within the A (2)Pi(u) --> X (2)Pi(g) emission of CO(2)(+*) indicates that the vibrational distribution is well described by the Franck-Condon principle at high collision energy, a consequence of short collision time but not necessarily an indication of vertical transitions. Below 3 keV ion translational energy, vibrational excitation in the A (2)Pi(u) electronic state was observed. The observation is consistent with the explanation that the reaction occurs at small impact parameters, in which short-range, repulsive interactions between the projectile and the target result in direct translational-vibrational excitation.
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Affiliation(s)
- Clement Poon
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
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He SG, Clouthier DJ. The molecular structure and a Renner-Teller analysis of the ground and first excited electronic states of the jet-cooled CS2+ molecular ion. J Chem Phys 2006; 124:084312. [PMID: 16512721 DOI: 10.1063/1.2172612] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The A 2Pi(u) - X 2Pi(g) electronic band system of the jet-cooled CS2 + ion has been studied by laser-induced fluorescence and wavelength-resolved emission techniques. The ions were produced in a pulsed electric discharge jet using a precursor mixture of carbon disulfide vapor in high-pressure argon. Rotational analysis of the high-resolution spectrum of the 2Pi32 component of the 0(0) 0 band gave linear-molecule molecular structures of r0" = 1.5554(10) A and r0' = 1.6172(12) A. Renner-Teller analyses of the vibronic structure in the spectra showed that the ground-state spin-orbit splitting (A = -447.0 cm(-1)) is much larger than that of the excited state (A = -177.5 cm(-1)), but that the Renner-Teller parameters are of similar magnitude and that a strong nu1 - 2nu2 Fermi resonance occurs in both states. Previous analyses of the vibronic structure in the ground and excited states of the ion from pulsed field-ionization-photoelectron data are shown to be substantially correct.
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Affiliation(s)
- Sheng-Gui He
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
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Zhang L, Wang F, Wang Z, Yu S, Liu S, Ma X. Study on the Second Dissociation Channel of CS2+ by Using [1+1] Two-Photon Dissociation. J Phys Chem A 2004. [DOI: 10.1021/jp036820q] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Limin Zhang
- Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Feng Wang
- Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Zhong Wang
- Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Shuqin Yu
- Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Shilin Liu
- Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Xingxiao Ma
- Laboratory of Bond Selective Chemistry, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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Zhang L, Chen J, Xu H, Dai J, Liu S, Ma X. Ã 2Πu state-intermediated two-photon dissociation of CS2+ via the first channel. J Chem Phys 2001. [DOI: 10.1063/1.1377600] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Torres I, Martínez R, Sánchez Rayo M, Castaño F. Nascent kinetic energy distributions of the ions produced by electron-impact on the CH3F molecule. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00861-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Collisional quenching and excitation cross-sections of the CO2+ A2Π(1→3,0,0) and B2Σ+ (0,0,0) excited states from electron-impact ionization. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00712-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tokue I, Kudo T, Kobayashi M, Yamasaki K. Photoemission Cross Sections for Ions Produced by Collisions of He(23S) Atoms with Linear Triatomic Molecules and Fluorobenzenes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1997. [DOI: 10.1246/bcsj.70.71] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Li XC, Lou NQ. Studies on State-to-State Energy Transfer of Electronically Excited Atoms and Molecules. J CHIN CHEM SOC-TAIP 1995. [DOI: 10.1002/jccs.199500026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dobber MR, Buma WJ, de Lange CA. (3+1) resonance enhanced multiphoton ionization photoelectron spectroscopy on nf Rydberg states of carbon dioxide. J Chem Phys 1994. [DOI: 10.1063/1.467961] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Tokue I, Kobayashi M, Suzuki S, Ito Y. Rotational distributions of OH(A 2Σ+) produced by electron-impact dissociation of jet-cooled H2O and CH3OH. Chem Phys 1994. [DOI: 10.1016/0301-0104(94)87026-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tokue I, Wang J, Ito YRID. Rotational Excitation in the N2(C3.PI.u) and N+2(B2.SIGMA.+u) States Produced by Electron Impact of N2. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1993. [DOI: 10.1246/bcsj.66.69] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tokue I, Kobayashi M, Ito Y. Vibrational distributions of N2O+(Ã 2Σ+) produced by electron impact on jet‐cooled N2O. J Chem Phys 1992. [DOI: 10.1063/1.462396] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rotational distributions of N2O+ (Ã 2Σ+), CO+2(Ã 2Πu) and CS+2 (Ã 2Πu) produced by electron-impact ionization. Chem Phys 1991. [DOI: 10.1016/0301-0104(91)87064-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Wu M, Taylor DP, Johnson PM. Resonance enhanced multiphoton ionization photoelectron spectra of CO2. II. Competition between photoionization and dissociation. J Chem Phys 1991. [DOI: 10.1063/1.461082] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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