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Anomalous formation of trihydrogen cations from water on nanoparticles. Nat Commun 2021; 12:3839. [PMID: 34158493 PMCID: PMC8219811 DOI: 10.1038/s41467-021-24175-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 06/01/2021] [Indexed: 11/21/2022] Open
Abstract
Regarded as the most important ion in interstellar chemistry, the trihydrogen cation, \documentclass[12pt]{minimal}
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\begin{document}$${{\rm{H}}}_{{{3}}}^{+}$$\end{document}H3+, plays a vital role in the formation of water and many complex organic molecules believed to be responsible for life in our universe. Apart from traditional plasma discharges, recent laboratory studies have focused on forming the trihydrogen cation from large organic molecules during their interactions with intense radiation and charged particles. In contrast, we present results on forming \documentclass[12pt]{minimal}
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\begin{document}$${{\rm{H}}}_{{{3}}}^{+}$$\end{document}H3+ from bimolecular reactions that involve only an inorganic molecule, namely water, without the presence of any organic molecules to facilitate its formation. This generation of \documentclass[12pt]{minimal}
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\begin{document}$${{\rm{H}}}_{{{3}}}^{+}$$\end{document}H3+ is enabled by “engineering” a suitable reaction environment comprising water-covered silica nanoparticles exposed to intense, femtosecond laser pulses. Similar, naturally-occurring, environments might exist in astrophysical settings where hydrated nanometer-sized dust particles are impacted by cosmic rays of charged particles or solar wind ions. Our results are a clear manifestation of how aerosolized nanoparticles in intense femtosecond laser fields can serve as a catalysts that enable exotic molecular entities to be produced via non-traditional routes. The H3+ ion plays a key role in interstellar chemistry and can be formed from organic compounds upon interaction with charged particles or radiation. Here the authors demonstrate that H3+ can also be formed from water adsorbed on silica nanoparticles exposed to intense laser pulses, conditions that mimic the impact of charged particles on dust in astrophysical settings.
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Shapko D, Dohnal P, Kassayová M, Kálosi Á, Rednyk S, Roučka Š, Plašil R, Augustovičová LD, Johnsen R, Špirko V, Glosík J. Dissociative recombination of N 2H + ions with electrons in the temperature range of 80-350 K. J Chem Phys 2020; 152:024301. [PMID: 31941287 DOI: 10.1063/1.5128330] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Recombination of N2H+ ions with electrons was studied using a stationary afterglow with a cavity ring-down spectrometer. We probed in situ the time evolutions of number densities of different rotational and vibrational states of recombining N2H+ ions and determined the thermal recombination rate coefficients for N2H+ in the temperature range of 80-350 K. The newly calculated vibrational transition moments of N2H+ are used to explain the different values of recombination rate coefficients obtained in some of the previous studies. No statistically significant dependence of the measured recombination rate coefficient on the buffer gas number density was observed.
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Affiliation(s)
- Dmytro Shapko
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Petr Dohnal
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Miroslava Kassayová
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Ábel Kálosi
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Serhiy Rednyk
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Štěpán Roučka
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Radek Plašil
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Lucie D Augustovičová
- Faculty of Mathematics and Physics, Department of Chemical Physics and Optics, Charles University, Prague, Czech Republic
| | - Rainer Johnsen
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - Vladimír Špirko
- Faculty of Mathematics and Physics, Department of Chemical Physics and Optics, Charles University, Prague, Czech Republic
| | - Juraj Glosík
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
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Ekanayake N, Nairat M, Weingartz NP, Michie MJ, Levine BG, Dantus M. Substituent effects on H 3 + formation via H 2 roaming mechanisms from organic molecules under strong-field photodissociation. J Chem Phys 2018; 149:244310. [PMID: 30599731 DOI: 10.1063/1.5065387] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Roaming chemical reactions are often associated with neutral molecules. The recent findings of roaming processes in ionic species, in particular, ones that lead to the formation of H3 + under strong-field laser excitation, are of considerable interest. Given that such gas-phase reactions are initiated by double ionization and subsequently facilitated through deprotonation, we investigate the strong-field photodissociation of ethanethiol, also known as ethyl mercaptan, and compare it to results from ethanol. Contrary to expectations, the H3 + yield was found to be an order of magnitude lower for ethanethiol at certain laser field intensities, despite its lower ionization energy and higher acidity compared to ethanol. In-depth analysis of the femtosecond time-resolved experimental findings, supported by ab initio quantum mechanical calculations, provides key information regarding the roaming mechanisms related to H3 + formation. Results of this study on the dynamics of dissociative half-collisions involving H3 +, a vital cation which acts as a Brønsted-Lowry acid protonating interstellar organic compounds, may also provide valuable information regarding the formation mechanisms and observed natural abundances of complex organic molecules in interstellar media and planetary atmospheres.
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Affiliation(s)
- Nagitha Ekanayake
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Muath Nairat
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Nicholas P Weingartz
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Matthew J Michie
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Benjamin G Levine
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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Ekanayake N, Severt T, Nairat M, Weingartz NP, Farris BM, Kaderiya B, Feizollah P, Jochim B, Ziaee F, Borne K, Raju P K, Carnes KD, Rolles D, Rudenko A, Levine BG, Jackson JE, Ben-Itzhak I, Dantus M. H 2 roaming chemistry and the formation of H 3+ from organic molecules in strong laser fields. Nat Commun 2018; 9:5186. [PMID: 30518927 PMCID: PMC6281587 DOI: 10.1038/s41467-018-07577-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 11/06/2018] [Indexed: 11/11/2022] Open
Abstract
Roaming mechanisms, involving the brief generation of a neutral atom or molecule that stays in the vicinity before reacting with the remaining atoms of the precursor, are providing valuable insights into previously unexplained chemical reactions. Here, the mechanistic details and femtosecond time-resolved dynamics of H3+ formation from a series of alcohols with varying primary carbon chain lengths are obtained through a combination of strong-field laser excitation studies and ab initio molecular dynamics calculations. For small alcohols, four distinct pathways involving hydrogen migration and H2 roaming prior to H3+ formation are uncovered. Despite the increased number of hydrogens and possible combinations leading to H3+ formation, the yield decreases as the carbon chain length increases. The fundamental mechanistic findings presented here explore the formation of H3+, the most important ion in interstellar chemistry, through H2 roaming occurring in ionic species. H2 roaming is associated with H3+ formation when certain organic molecules are exposed to strong laser fields. Here, the mechanistic details and time-resolved dynamics of H3+ formation from a series of alcohols were obtained and found that the product yield decreases as the carbon chain length increases.
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Affiliation(s)
- Nagitha Ekanayake
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Travis Severt
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Muath Nairat
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Nicholas P Weingartz
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Benjamin M Farris
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Balram Kaderiya
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Peyman Feizollah
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Bethany Jochim
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Farzaneh Ziaee
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kurtis Borne
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kanaka Raju P
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Kevin D Carnes
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Benjamin G Levine
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - James E Jackson
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Itzik Ben-Itzhak
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66506, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA. .,Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824, USA.
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Plašil R, Dohnal P, Kálosi Á, Roučka Š, Shapko D, Rednyk S, Johnsen R, Glosík J. Stationary afterglow apparatus with CRDS for study of processes in plasmas from 300 K down to 30 K. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:063116. [PMID: 29960549 DOI: 10.1063/1.5036834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A cryogenic stationary afterglow apparatus equipped with a near-infrared cavity-ring-down-spectrometer (Cryo-SA-CRDS) for studies of electron-ion recombination processes in the plasma at temperatures 30-300 K has been designed, constructed, tested, and put into operation. The plasma is generated in a sapphire discharge tube that is contained in a microwave cavity. The cavity and the tube are attached to the second stage of the cold head of the cryocooler system, and they are inserted to an UHV chamber with mirrors for CRDS and vacuum windows on both ends of the tube. The temperature of the discharge tube can be made as low as 25 K. In initial test measurements, the discharge was ignited in He/Ar/H2 or He/H2 gas mixtures and the density of H3+ ions and their kinetic and rotational temperatures were measured during the discharge and afterglow. From the measured decrease in the ion density, during the afterglow, effective recombination rate coefficients were determined. Plasma relaxation was studied in He/Ar gas mixtures by monitoring the presence of highly excited argon atoms. The spectroscopic measurements demonstrated that the kinetic temperature of the ions is equal to the gas temperature and that it can be varied from 300 K down to 30 K.
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Affiliation(s)
- R Plašil
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - P Dohnal
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - Á Kálosi
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - Š Roučka
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - D Shapko
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - S Rednyk
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - R Johnsen
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - J Glosík
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
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Rubovič P, Dohnal P, Hejduk M, Plašil R, Glosík J. Binary Recombination of H3+ and D3+ Ions with Electrons in Plasma at 50–230 K. J Phys Chem A 2013; 117:9626-32. [DOI: 10.1021/jp3123192] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter Rubovič
- Department of Surface
and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague 18000, Czech Republic
| | - Petr Dohnal
- Department of Surface
and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague 18000, Czech Republic
| | - Michal Hejduk
- Department of Surface
and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague 18000, Czech Republic
| | - Radek Plašil
- Department of Surface
and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague 18000, Czech Republic
| | - Juraj Glosík
- Department of Surface
and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague 18000, Czech Republic
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Schirmel N, Reusch N, Horsch P, Weitzel KM. Formation of fragment ions (H+, H3+, CH3+) from ethane in intense femtosecond laser fields – from understanding to control. Faraday Discuss 2013; 163:461-74; discussion 513-43. [DOI: 10.1039/c3fd20152j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Dohnal P, Hejduk M, Rubovič P, Varju J, Roučka Š, Plašil R, Glosík J. Binary and ternary recombination of D3+ ions at 80–130 K: Application of laser absorption spectroscopy. J Chem Phys 2012. [DOI: 10.1063/1.4767396] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Kreckel H, Petrignani A, Novotny O, Crabtree K, Buhr H, McCall BJ, Wolf A. Storage ring measurements of the dissociative recombination of H3+. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2012; 370:5088-5100. [PMID: 23028156 DOI: 10.1098/rsta.2012.0019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The dissociative recombination (DR) of H(3)(+) is a key process in interstellar chemistry. More than 30 experimental studies of the DR process have been published in the literature. The H(3)(+) DR rate coefficient results obtained from these measurements, however, have not always been consistent. The outcome seems to depend on the experimental method, on the exact measurement procedure and sometimes even on the interpretation of the experimental data. In the past two decades, heavy-ion storage rings have become the working horse for DR measurements, as they provide a direct measurement of the DR products. Furthermore, storage ring measurements yield energy-resolved rate coefficients with unprecedented resolution that allow for detailed comparison with theory. DR results from different storage ring facilities have shown a remarkable consistency throughout the years and they provide additional information on break-up dynamics and internal excitation. In this study, we will review the storage ring DR measurements that have been carried out for H(3)(+).
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Affiliation(s)
- Holger Kreckel
- Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
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11
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Dohnal P, Hejduk M, Varju J, Rubovic P, Roucka S, Kotrík T, Plasil R, Johnsen R, Glosík J. Binary recombination of para- and ortho-H3+ with electrons at low temperatures. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2012; 370:5101-5108. [PMID: 23028157 DOI: 10.1098/rsta.2012.0097] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Results of an experimental study of binary recombination of para- and ortho-H(3)(+) ions with electrons are presented. Near-infrared cavity-ring-down absorption spectroscopy was used to probe the lowest rotational states of H(3)(+) ions in the temperature range of 77-200 K in an H(3)(+)-dominated afterglow plasma. By changing the para/ortho abundance ratio, we were able to obtain the binary recombination rate coefficients for pure and para-H(3)(+) and ortho-H(3)(+). The results are in good agreement with previous theoretical predictions.
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Affiliation(s)
- P Dohnal
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
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12
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Larsson M. Dissociative recombination of H3+: 10 years in retrospect. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2012; 370:5118-29. [PMID: 23028159 PMCID: PMC3479713 DOI: 10.1098/rsta.2012.0020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The dissociative recombination of H(3)(+) has been an intriguing problem for more than half a century. The early experiments on H(3)(+) during the first 20 years were carried out without mass analysis in decaying plasma afterglows, and thus the measured rates pertained to an uncontrolled mixture of H(3)(+) and impurity ions. When mass analysis was used, the rate coefficient was determined to be an uneventful value of about 10(-7) cm(3) s(-1), a very common rate coefficient for many molecular ions. But this was not the end of the story, not even the beginning of the end; it marked only the end of the beginning. The story I will tell in this article started about 10 years ago, when the dissociative recombination of H(3)(+) was approaching its deepest crisis. Today, owing to an extensive experimental and theoretical effort, the state of affairs has reached a historically unique level of harmony, although there still remains many things to sort out.
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Affiliation(s)
- Mats Larsson
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
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13
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Dohnal P, Hejduk M, Varju J, Rubovič P, Roučka Š, Kotrík T, Plašil R, Glosík J, Johnsen R. Binary and ternary recombination of para-H3+ and ortho-H3+ with electrons: State selective study at 77–200 K. J Chem Phys 2012; 136:244304. [DOI: 10.1063/1.4730162] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Glosík J, Plašil R, Kotrík T, Dohnal P, Varju J, Hejduk M, Korolov I, Roučka Š, Kokoouline V. Binary and ternary recombination of and ions with electrons in low temperature plasma. Mol Phys 2010. [DOI: 10.1080/00268976.2010.507555] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Kotrík T, Dohnal P, Korolov I, Plašil R, Roučka Š, Glosík J, Greene CH, Kokoouline V. Temperature dependence of binary and ternary recombination of D3+ ions with electrons. J Chem Phys 2010; 133:034305. [DOI: 10.1063/1.3457940] [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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Glosik J, Plasil R, Korolov I, Novotny O, Kotrik T. Multicollision character of recombination of H3+ions in afterglow plasma. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/192/1/012005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Larsson M, McCall B, Orel A. The dissociative recombination of H3+ – a saga coming to an end? Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.06.069] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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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(+).
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Affiliation(s)
- Richard E Rosati
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
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19
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Korolov I, Novotný O, Plašil R, Hlavenka P, Kotrík T, Tichý M, Kudrna P, Glosík J, Luca A. Recombination of KrH+ and XeH+ ions with electrons in low temperature plasma. ACTA ACUST UNITED AC 2006. [DOI: 10.1007/s10582-006-0295-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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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.
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Affiliation(s)
- Viktoriya Poterya
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
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21
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McLain JL, Poterya V, Molek CD, Jackson DM, Babcock LM, Adams NG. C3H3+ Isomers: Temperature Dependencies of Production in the H3+ Reaction with Allene and Loss by Dissociative Recombination with Electrons. J Phys Chem A 2005; 109:5119-23. [PMID: 16833865 DOI: 10.1021/jp0444159] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A technique has been developed to simultaneously determine recombination rate coefficients, alpha e, and initial concentrations of ion types that coexist in a flowing afterglow plasma. This was tested using the H3(+) + allene reaction in which two different C3H3+ isomers are produced. Use of an electrostatic Langmuir probe enabled the C3H3+ isomer branching ratios for propargyl and cyclic C3H3+ from this allene reaction and their alpha e to be determined over the temperature range 172-489 K. The study showed that the cyclic C3H3+ to propargyl C3H3+ branching ratios from the allene reaction varied from 50/50 at 172 K to 18/82 at 489 K. Over this temperature range, the alpha e for both isomers change only slightly. The room temperature alpha e values for propargyl and cyclic C3H3+ are (1.15 +/- 0.2) x 10(-7) and (8.00 +/- 0.1) x 10(-7) cm3/s, respectively. The data are discussed relative to current theories and in relation to fuel-rich flame chemistry, interstellar molecular synthesis, and modeling of Titan's atmosphere.
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Affiliation(s)
- Jason L McLain
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
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Rosati RE, Johnsen R, Golde MF. Yield of electronically excited N2 molecules from the dissociative recombination of N2H+ with e-. J Chem Phys 2004; 120:8025-30. [PMID: 15267721 DOI: 10.1063/1.1695314] [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
Quantitative spectroscopic observations of the N2 first positive band system (N2(B 3Pig-A 3Sigmau+))/electron in a recombining N2H+ flowing-afterglow plasma indicate that a substantial fraction of the product N2 molecules are formed in one or more of the low-lying triplet states, B 3Pig, A 3Sigmau+, and W 3Deltau. The total measured N2(B-A) emission intensity from N2(B,v' > or = 1) is equivalent to a yield of (19 +/- 8)%. The effect of rapid collision-induced transitions between states of the triplet manifold is discussed..
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Affiliation(s)
- Richard E Rosati
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
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Milligan DB, Wilson PF, Freeman CG, Meot-Ner M, McEwan MJ. Dissociative Proton Transfer Reactions of H3+, N2H+, and H3O+ with Acyclic, Cyclic, and Aromatic Hydrocarbons and Nitrogen Compounds, and Astrochemical Implications. J Phys Chem A 2002. [DOI: 10.1021/jp014659i] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel B. Milligan
- Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch 8001, New Zealand
| | - Paul F. Wilson
- Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch 8001, New Zealand
| | - Colin G. Freeman
- Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch 8001, New Zealand
| | - Michael Meot-Ner
- Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch 8001, New Zealand
| | - Murray J. McEwan
- Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch 8001, New Zealand
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Poterya V, Glosík J, Plasil R, Tichý M, Kudrna P, Pysanenko A. Recombination of D3+ ions in the afterglow of a He-Ar- D2 plasma. PHYSICAL REVIEW LETTERS 2002; 88:044802. [PMID: 11801127 DOI: 10.1103/physrevlett.88.044802] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2001] [Indexed: 05/23/2023]
Abstract
We report measurements of the rate coefficient alpha for recombination of D3+ with electrons in a He-Ar-D2 plasma. The observed rate coefficient is dependent on the deuterium number density indicating that third-body assisted recombination is efficient and significantly contributes to recombination. When the deuterium number density is decreased to 7x10(10) cm(-3), the rate coefficient also decreases to alpha approximately 6x10(-9) cm3 x s(-1). These data indicate that the binary dissociative recombination of D3+ is very slow with alphaDR<6x10(-9) cm3 x s(-1). The observation of a deionization process proceeding via formation of D5+ is also reported.
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Affiliation(s)
- V Poterya
- Mathematics and Physics Faculty, Charles University Prague, V Holesovickách 2, Prague 8, Czech Republic
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Merged-beams studies of electron-molecular ion interactions in ion storage rings. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s1071-9687(01)80008-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Glosı́k J, Plašil R, Poterya V, Kudrna P, Tichý M. The recombination of H3+ ions with electrons: dependence on partial pressure of H2. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)01183-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kudrna P, Plaŝil R, Glosík J, Tichý M, Poteriya V, Rusz J. Advanced Integrated Stationary Afterglow apparatus for study of recombination in He−Ar−H2 plasma. ACTA ACUST UNITED AC 2000. [DOI: 10.1007/bf03165906] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rebrion-Rowe C, Lehfaoui L, Rowe BR, Mitchell JBA. The dissociative recombination of hydrocarbon ions. II. Alkene and alkyne derived species. J Chem Phys 1998. [DOI: 10.1063/1.476135] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
The development of heavy-ion storage-cooler rings for atomic physics has made it possible to produce high-quality beams of molecular ions that are internally cold. The stored molecular-ion beam is immersed in a cold electron bath, which gives a beam of low divergence and small cross-sectional area. The electron cooler also serves as a target for electron-molecular ion collision experiments. This allows the study of dissociative recombination of cold molecules with respect to cross sections, branching ratios, and angular distributions at an unprecedented luminosity.
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Affiliation(s)
- M Larsson
- Department of Physics, Stockholm University, PO Box 6730, Stockholm, S-113 85 Sweden.
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Gougousi T, Johnsen R, Golde MF. Yield determination of OH(v=0,1) radicals produced by the electron-ion recombination of H3O+ ions. J Chem Phys 1997. [DOI: 10.1063/1.474586] [Citation(s) in RCA: 19] [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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Lehfaoui L, Rebrion-Rowe C, Laubé S, Mitchell JBA, Rowe BR. The dissociative recombination of hydrocarbon ions. I. Light alkanes. J Chem Phys 1997. [DOI: 10.1063/1.473566] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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The semiclassical—classical path theory of direct electron—ion dissociative recombination and e− + H3+ recombination. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0168-1176(95)04293-t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Španěl P, Dittrichová L, Smith D. FALP studies of the dissociative recombination coefficients for O2+ and NO+ within the electron temperature range 300–2000 K. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0168-1176(93)87041-p] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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