1
|
Hamberg M, Kashperka I, Thomas RD, Roueff E, Zhaunerchyk V, Danielsson M, af Ugglas M, Österdahl F, Vigren E, Kaminska M, Källberg A, Simonsson A, Paal A, Gerin M, Larsson M, Geppert WD. Experimental Studies of H13CO+ Recombining with Electrons at Energies between 2–50 000 meV. J Phys Chem A 2014; 118:6034-49. [DOI: 10.1021/jp5032306] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mathias Hamberg
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
- Department
of Physics and Astronomy, Uppsala University, SE- 751 20 Uppsala, Sweden
| | - Iryna Kashperka
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Richard D. Thomas
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Evelyne Roueff
- LUTH, Observatoire de Paris, Place Janssen, 92190 Meudon, France
| | - Vitali Zhaunerchyk
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
- Department
of Physics and Astronomy, Uppsala University, SE- 751 20 Uppsala, Sweden
| | - Mathias Danielsson
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Magnus af Ugglas
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Fabian Österdahl
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Erik Vigren
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Magdalena Kaminska
- Institute
of Physics, Świętokrzyska Academy, ul. Świętokrzyska
15, PL-25406 Kielce, Poland
| | - Anders Källberg
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Ansgar Simonsson
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Andras Paal
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | | | - Mats Larsson
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| | - Wolf D. Geppert
- Department
of Physics, Stockholm University, Alba Nova, SE-106 91 Stockholm, Sweden
| |
Collapse
|
2
|
Fonseca dos Santos S, Douguet N, Kokoouline V, Orel AE. Scattering matrix approach to the dissociative recombination of HCO+ and N2H+. J Chem Phys 2014; 140:164308. [DOI: 10.1063/1.4871982] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
3
|
Kokoouline V, Douguet N, Greene CH. Breaking bonds with electrons: Dissociative recombination of molecular ions. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.03.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
4
|
Carles S, Le Garrec JL, Mitchell JBA. Electron and ion reactions with hexamethyldisiloxane and pentamethyldisiloxane. J Chem Phys 2007; 127:144308. [DOI: 10.1063/1.2774984] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
5
|
Rosati RE, Skrzypkowski MP, Johnsen R, Golde MF. Yield of excited CO molecules from dissociative recombination of HCO+ and HOC+ ions with electrons. J Chem Phys 2007; 126:154302. [PMID: 17461621 DOI: 10.1063/1.2715943] [Citation(s) in RCA: 16] [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 authors have investigated CO band emissions arising from the dissociative recombination of HCO(+) and HOC(+) ions with thermal electrons in a flowing afterglow plasma. The quantitative analysis of the band intensities showed that HCO(+) recombination forms the long-lived CO(a (3)Pi) state with a yield of 0.23+/-0.12, while HOC(+) recombination favors formation of CO(a' (3)Sigma(+)) and CO(d (3)Delta) with a combined yield of greater than 0.4. The observed vibrational distribution for the CO(a) state reproduces theoretical predictions quite well. The vibrational distributions for CO(a') and CO(d) are, in part, inverted, presumably as a consequence of a change in CO equilibrium bond length during recombination. The observations are compatible with current knowledge of the potential surfaces of states of HCO and HCO(+).
Collapse
Affiliation(s)
- Richard E Rosati
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | | | | | | |
Collapse
|
6
|
Biennier L, Alsayed-Ali M, Foutel-Richard A, Novotny O, Carles S, Rebrion-Rowe C, Rowe B. Laboratory measurements of the recombination of PAH ions with electrons: implications for the PAH charge state in interstellar clouds. Faraday Discuss 2006; 133:289-301; discussion 347-74, 449-52. [PMID: 17191453 DOI: 10.1039/b516858a] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Laboratory measurements of the recombination of polycyclic aromatic hydrocarbon (PAH) ions with electrons are presented. Experimental data have been obtained at room temperature for azulene (C10H8) and acenaphthene (C12H10) cations by the Flowing Afterglow with PhotoIons method. The results confirm that the recombination of PAH ions is fast although well below the geometrical limit. The set of our recent and present measurements reveal a definite trend of increasing rate with the number of carbon atoms of the PAH. This behaviour that needs further characterization is potentially of great interest for charge state models as recombination is a dominant mechanism of PAH ion destruction in the interstellar medium. The design of experiments to measure the recombination of larger PAHs and their temperature dependence is discussed.
Collapse
Affiliation(s)
- Ludovic Biennier
- Laboratoire de Physique des Atomes, Lasers, Molécules et Surfaces, UMR 6627 CNRS et Université de Rennes 1, France
| | | | | | | | | | | | | |
Collapse
|
7
|
Feuerbacher S, Santra R. Calculating molecular Rydberg states using the one-particle Green's function: application to HCO and C(NH2)3. J Chem Phys 2005; 123:194310. [PMID: 16321091 DOI: 10.1063/1.2122687] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A simple but accurate and computationally efficient method for routine ab initio calculations of molecular Rydberg states is described. The method, which can be applied to Rydberg states associated with a nondegenerate ion core, consists in the self-consistent solution of an effective one-electron problem. First, the restricted Hartree-Fock problem of the ion core is solved. The orbital energies and certain two-electron Coulomb matrix elements with respect to the molecular orbital basis are then used to construct an energy-dependent many-body correction to the Hartree-Fock mean field. This correction is derived from the Dyson equation satisfied by the one-particle Green's function. The method is applied to calculate Rydberg potential-energy curves of HCO. The presented data confirm and extend recent large-scale multireference configuration-interaction calculations and help develop a detailed theoretical description of the astrophysically important dissociative recombination of a low-energy electron with HCO(+). As further illustration of the utility of the method, the first ab initio calculations of the excited states of an electron bound to the guanidinium cation [C(NH(2))(3)](+) are reported.
Collapse
Affiliation(s)
- Sven Feuerbacher
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | | |
Collapse
|
8
|
Novotný O, Sivaraman B, Rebrion-Rowe C, Travers D, Biennier L, Mitchell JBA, Rowe BR. Recombination of polycyclic aromatic hydrocarbon photoions with electrons in a flowing afterglow plasma. J Chem Phys 2005; 123:104303. [PMID: 16178593 DOI: 10.1063/1.2000927] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A new technique, flowing afterglow with photoions (FIAPI), has been developed to measure the rate coefficient for the recombination of complex ions, and, in particular, polycyclic aromatic hydrocarbon (PAH) cations with electrons. The method is based on the flowing afterglow Langmuir probe - mass spectrometer apparatus at the University of Rennes I. A helium plasma is generated by a microwave discharge in a He buffer gas and downstream, a small amount of argon gas is injected to destroy any helium metastables. A very small amount of neutral PAH molecules is added to the afterglow plasma by evaporation from a plate coated with the PAH to be studied. PAH ions are then produced by photoionization of the parent molecule using a pulsed UV laser (157 nm). The laser beam is oriented along the flow tube and so a constant spatial concentration of photoions is obtained. The electron concentration along the flow tube is measured by means of a movable Langmuir probe. Ion concentration decay in time is measured at a fixed position using a quadrupole mass spectrometer which is triggered by the laser pulse. The recombination of anthracene and pyrene cations has been studied using this technique and we have found a recombination rate of (2.4 +/- 0.8) x 10(-6) cm(3) s(-1) for anthracene and (4.1 +/- 1.2) x 10(-6) cm(3) s(-1) for pyrene.
Collapse
Affiliation(s)
- O Novotný
- Laboratoire de Physique des Atomes, Lasers, Molécules et Surfaces (PALMS), Unite Mixte de Recherché (UMR), No. 6627 du Centre National de la Recherché Scientifique (CNRS), Université de Rennes I, France.
| | | | | | | | | | | | | |
Collapse
|
9
|
Poterya V, McLain JL, Adams NG, Babcock LM. Mechanisms of Electron-Ion Recombination of N2H+/N2D+ and HCO+/DCO+ Ions: Temperature Dependence and Isotopic Effect. J Phys Chem A 2005; 109:7181-6. [PMID: 16834082 DOI: 10.1021/jp051945b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The temperature dependencies of the rate coefficients, alpha(e), for electron-ion dissociative recombination (DR) of N2H+/N2D+ and HCO+/DCO+ ions with electrons have been measured over the range 100-500 K. Also, optical emissions have been detected at approximately 100 K from the N2(B3(pi)g) electronically excited products of N2H+/N2D+ recombination. The measurements were carried out using the classic FALP technique combined with an optical monochromator. For N2H+, there was no variation of alpha(e) with temperature above 200 K, with an average value of alpha(e)(N2H+) = 2.8 x 10(-7) cm3 s(-1). The temperature variation for T approximately 100-300 K observed for alpha(e)(HCO+) is similar to that of N2H+ ions for T approximately 300-500 K. The smaller rate coefficient measured for DCO+ and N2D+ ions shows the influence of an isotope effect. The substantial enhancement of the vibrational level, upsilon' = 6, from the N2B state for N2H+ recombination over N2D+ recombination is consistent with previous result at 300 K and implies the influence of a tunneling mechanism of DR.
Collapse
Affiliation(s)
- Viktoriya Poterya
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | | | | | | |
Collapse
|
10
|
|
11
|
Rebrion-Rowe C, Mostefaoui T, Laubé S, Mitchell JBA. The dissociative recombination of hydrocarbon ions. III. Methyl-substituted benzene ring compounds. J Chem Phys 2000. [DOI: 10.1063/1.1286974] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
12
|
A coordinated flowing afterglow and crossed beam study of electron attachment to CCl3Br. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0168-1176(97)00028-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
13
|
Gougousi T, Golde MF, Johnsen R. Electron-ion recombination rate coefficient measurements in a flowing afterglow plasma. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(96)01488-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
14
|
|
15
|
Canosa A, Laubé S, Rebrion C, Pasquerault D, Gomet J, Rowe B. Reaction of anthracene with atomic ions of interstellar interest. A FALP measurement at room temperature. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)01040-g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Studies of the formation of cluster ions NH4+·(NH3)n, n = 1–4, using a high pressure flowing afterglow apparatus. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0168-1176(95)04259-n] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Electron attachment to anthracene. A FALP measurement of the rate coefficient at room temperature. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)00908-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
18
|
Smith D, Španěl P. Dissociative recombination of H3+ and some other interstellar ions: a controversy resolved. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0168-1176(93)87040-y] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
19
|
Abouelaziz H, Gomet JC, Pasquerault D, Rowe BR, Mitchell JBA. Measurements of C3H+3, C5H+3, C6H+6, C7H+5, and C10H+8 dissociative recombination rate coefficients. J Chem Phys 1993. [DOI: 10.1063/1.465801] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
20
|
Sonnenfroh DM, Caledonia GE, Lurie J. Emission from OH(A) produced in the dissociative recombination of H2O+ with electrons. J Chem Phys 1993. [DOI: 10.1063/1.464115] [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
|
21
|
Canosa A, Gomet JC, Rowe BR, Mitchell JBA, Queffelec JL. Further measurements of the H+3(v=0,1,2) dissociative recombination rate coefficient. J Chem Phys 1992. [DOI: 10.1063/1.463282] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
22
|
Abouelaziz H, Queffelec J, Rebrion C, Rowe B, Gomet J, Canosa A. Dissociative recombination of HCS+ and H3S+ ions studied in a flowing afterglow apparatus. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)86049-n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|