1
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Chen A, Miao T. Photoionization of the Propargyl Radical Using the R-Matrix Method. J Phys Chem A 2024; 128:1226-1232. [PMID: 38330917 DOI: 10.1021/acs.jpca.3c07259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
The absolute photoionization cross section of the propargyl radical measured by Savee et al. [J. Chem. Phys. 2012, 136, 134307] is about 2-3 times larger than the experimental result from Robinson et al. [J. Chem. Phys. 2003, 119, 5311]. Meanwhile, there is a significant discrepancy in the shapes of the propargyl photoionization spectra between these two measurements and the result measured by Zhang et al. [J. Chem. Phys. 2006, 124, 074302]. To estimate the accuracy of the various results, we carried out comprehensive calculations with the multichannel R-matrix method, which uses multiconfigurational wave functions to generate accurate initial and final states. Three scattering models including static-exchange, correlated 1 state, and 80 state close-coupling (CC) approximations are employed to reveal the dynamic interaction. The autoionization peaks near the ionization threshold are predicted for the first time. Two resonances are detected with the photon energy around 41.4 and 49.6 eV in the 80 state CC model. We checked the sensitivity of the results to change descriptions of the active spaces, the different partial waves, and the R-matrix radii in the theoretical model. Our best results are compared with the experimental measurements, and discussions are provided. The cross sections and asymmetry parameters for the valence orbitals are reported for photon energies from ionization thresholds of 70 eV.
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Affiliation(s)
- Aimin Chen
- School of Chemistry and Material Engineering, Xinxiang University, Xinxiang 453003, P. R. China
| | - Tongjun Miao
- School of Physics and Electronic Engineering, Xinxiang University, Xinxiang 453003, P. R. China
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2
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Zhang Q, Zhu L, Zhou Z, Wang Z, Tian Y, Liu Y. Dissociative photoionization studies of ethyl iodide using synchrotron radiation photoionization mass spectrometry and photoelectron imaging. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2023.140427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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3
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Hemberger P, Wu X, Pan Z, Bodi A. Continuous Pyrolysis Microreactors: Hot Sources with Little Cooling? New Insights Utilizing Cation Velocity Map Imaging and Threshold Photoelectron Spectroscopy. J Phys Chem A 2022; 126:2196-2210. [PMID: 35316066 DOI: 10.1021/acs.jpca.2c00766] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Resistively heated silicon carbide microreactors are widely applied as continuous sources to selectively prepare elusive and reactive intermediates with astrochemical, catalytic, or combustion relevance to measure their photoelectron spectrum. These reactors also provide deep mechanistic insights into uni- and bimolecular chemistry. However, the sampling conditions and effects have not been fully characterized. We use cation velocity map imaging to measure the velocity distribution of the molecular beam signal and to quantify the scattered, rethermalized background sample. Although translational cooling is efficient in the adiabatic expansion from the reactor, the breakdown diagrams of methane and chlorobenzene confirm that the molecular beam component exhibits a rovibrational temperature comparable with that of the reactor. Thus, rovibrational cooling is practically absent in the expansion from the microreactor. The high rovibrational temperature also affects the threshold photoelectron spectrum of both benzene and the allyl radical in the molecular beam, but to different degrees. While the extreme broadening of the benzene TPES suggests a complex ionization mechanism, the allyl TPES is in fact consistent with an internal temperature close to that of the reactor. The background, room-temperature spectra of both are superbly reproduced by Franck-Condon simulations at 300 K. On the one hand, this leads us to suggest that room-temperature reference spectra should be used in species identification. On the other hand, analysis of the allyl iodide pyrolysis data shows that iodine atoms often recombine to form molecular iodine on the chamber surfaces. Such sampling effects may distort the chemical composition of the scattered background with respect to the molecular beam signal emanating directly from the reactor. This must be considered in quantitative analyses and kinetic modeling.
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Affiliation(s)
- Patrick Hemberger
- Paul Scherrer Insitute, Forschungsstrasse 111, CH-5232 Villigen PSI, Switzerland
| | - Xiangkun Wu
- Paul Scherrer Insitute, Forschungsstrasse 111, CH-5232 Villigen PSI, Switzerland
| | - Zeyou Pan
- Paul Scherrer Insitute, Forschungsstrasse 111, CH-5232 Villigen PSI, Switzerland
| | - Andras Bodi
- Paul Scherrer Insitute, Forschungsstrasse 111, CH-5232 Villigen PSI, Switzerland
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4
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Martins M, Reinwardt S, Schunck JO, Schwarz J, Baev K, Müller A, Buhr T, Perry-Sassmannshausen A, Klumpp S, Schippers S. Disentangling the Photodissociation Dynamics of the HF + Molecular Radical via Kinetic-Energy-Release-Resolved F 1s Core Excitation and Ionization. J Phys Chem Lett 2021; 12:1390-1395. [PMID: 33508188 DOI: 10.1021/acs.jpclett.0c03356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The F 1s core level photoionization of the ionic molecular radical HF+ has been studied using the photon-ion merged-beams technique at a synchrotron radiation source. Upon analyzing kinetic energy release (KER) dependent photoion yield spectra, complex ultrafast dissociation dynamics of the F 1s core hole excited σ* state can be revealed. By means of configuration-interaction electronic structure calculations of the excited molecular potential energy curves, this complex process can be attributed to a spin-dependent dissociation of the excited σ* biradical state.
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Affiliation(s)
- M Martins
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - S Reinwardt
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J O Schunck
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J Schwarz
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - K Baev
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - A Müller
- Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen, Leihgesterner Weg 217, 35392 Giessen, Germany
| | - T Buhr
- I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| | - A Perry-Sassmannshausen
- I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| | - S Klumpp
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
| | - S Schippers
- I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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5
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Voronova K, Ervin KM, Torma KG, Hemberger P, Bodi A, Gerber T, Osborn DL, Sztáray B. Radical Thermometers, Thermochemistry, and Photoelectron Spectra: A Photoelectron Photoion Coincidence Spectroscopy Study of the Methyl Peroxy Radical. J Phys Chem Lett 2018; 9:534-539. [PMID: 29290108 DOI: 10.1021/acs.jpclett.7b03145] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigated the simplest alkylperoxy radical, CH3OO, formed by reacting photolytically generated CH3 radicals with O2, using the new combustion reactions followed by photoelectron photoion coincidence (CRF-PEPICO) apparatus at the Swiss Light Source. Modeling the experimental photoion mass-selected threshold photoelectron spectrum using Franck-Condon simulations including transitions to triplet and singlet cationic states yielded the adiabatic ionization energy of 10.265 ± 0.025 eV. Dissociative photoionization of CH3OO generates the CH3+ fragment ion at the appearance energy of 11.164 ± 0.010 eV. Combining these two values with ΔfH0K°(CH3) yields ΔfH0K°(CH3OO) = 22.06 ± 0.97 kJ mol-1, reducing the uncertainty of the previously determined value by a factor of 5. Statistical simulation of the CH3OO breakdown diagram provides a molecular thermometer of the free radical's internal temperature, which we measured to be 330 ± 30 K.
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Affiliation(s)
- Krisztina Voronova
- Department of Chemistry, University of the Pacific , Stockton, California 95211, United States
| | - Kent M Ervin
- Department of Chemistry, University of Nevada, Reno , Reno, Nevada 89557-0216, United States
| | - Krisztián G Torma
- Department of Chemistry, University of the Pacific , Stockton, California 95211, United States
| | | | - Andras Bodi
- Paul Scherrer Institute , CH-5232 Villigen PSI, Switzerland
| | - Thomas Gerber
- Paul Scherrer Institute , CH-5232 Villigen PSI, Switzerland
| | - David L Osborn
- Combustion Research Facility, Sandia National Laboratories , Livermore, California 94551, United States
| | - Bálint Sztáray
- Department of Chemistry, University of the Pacific , Stockton, California 95211, United States
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6
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Garcia GA, Gans B, Krüger J, Holzmeier F, Röder A, Lopes A, Fittschen C, Alcaraz C, Loison JC. Valence shell threshold photoelectron spectroscopy of C3Hx (x = 0–3). Phys Chem Chem Phys 2018. [DOI: 10.1039/c8cp00510a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present the photoelectron spectra of C3Hx (x = 0–3) formed in a microwave discharge flow-tube reactor by consecutive H abstractions from C3H4 (C3Hx + F → C3Hx−1 + HF (x = 1–4)), but also from F + CH4 schemes by secondary reactions.
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Affiliation(s)
| | | | - Julia Krüger
- Synchrotron SOLEIL
- L'Orme des Merisiers
- Gif sur Yvette
- France
| | - Fabian Holzmeier
- Synchrotron SOLEIL
- L'Orme des Merisiers
- Gif sur Yvette
- France
- Laboratoire de Chimie Physique d'Orsay
| | - Anja Röder
- Synchrotron SOLEIL
- L'Orme des Merisiers
- Gif sur Yvette
- France
| | - Allan Lopes
- CNRS – Université Paris-Sud et Paris-Saclay
- Laboratoire de Chimie Physique
- UMR 8000
- Centre Universitaire Paris-Sud
- 91405 Orsay
| | | | - Christian Alcaraz
- CNRS – Université Paris-Sud et Paris-Saclay
- Laboratoire de Chimie Physique
- UMR 8000
- Centre Universitaire Paris-Sud
- 91405 Orsay
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7
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Constantinidis P, Hirsch F, Fischer I, Dey A, Rijs AM. Products of the Propargyl Self-Reaction at High Temperatures Investigated by IR/UV Ion Dip Spectroscopy. J Phys Chem A 2016; 121:181-191. [DOI: 10.1021/acs.jpca.6b08750] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- P. Constantinidis
- Institute
of Physical and Theoretical Chemistry, University of Würzburg, Am
Hubland, D-97074 Würzburg, Germany
| | - F. Hirsch
- Institute
of Physical and Theoretical Chemistry, University of Würzburg, Am
Hubland, D-97074 Würzburg, Germany
| | - I. Fischer
- Institute
of Physical and Theoretical Chemistry, University of Würzburg, Am
Hubland, D-97074 Würzburg, Germany
| | - A. Dey
- Radboud University, Institute for Molecules and
Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - A. M. Rijs
- Radboud University, Institute for Molecules and
Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
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8
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Sundararajan K, Gopi R, Ramanathan N. Conformations of propargyl alcohol and its interaction with acetylene: A matrix isolation infrared and DFT computations. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Holzmeier F, Fischer I, Kiendl B, Krueger A, Bodi A, Hemberger P. On the absolute photoionization cross section and dissociative photoionization of cyclopropenylidene. Phys Chem Chem Phys 2016; 18:9240-7. [DOI: 10.1039/c6cp01068g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the determination of the absolute photoionization cross section of cyclopropenylidene, c-C3H2, and the heat of formation of the C3H radical and ion derived by the dissociative ionization of the carbene.
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Affiliation(s)
- Fabian Holzmeier
- Institute of Physical and Theoretical Chemistry
- University of Würzburg
- D-97074 Würzburg
- Germany
| | - Ingo Fischer
- Institute of Physical and Theoretical Chemistry
- University of Würzburg
- D-97074 Würzburg
- Germany
| | - Benjamin Kiendl
- Institute of Organic Chemistry
- University of Würzburg
- D-97074 Würzburg
- Germany
| | - Anke Krueger
- Institute of Organic Chemistry
- University of Würzburg
- D-97074 Würzburg
- Germany
| | - Andras Bodi
- Paul Scherrer Institut
- CH-5232 Villigen PSI
- Switzerland
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10
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Lang M, Holzmeier F, Hemberger P, Fischer I. Threshold Photoelectron Spectra of Combustion Relevant C4H5 and C4H7 Isomers. J Phys Chem A 2015; 119:3995-4000. [DOI: 10.1021/acs.jpca.5b02153] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Melanie Lang
- Institute
of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg
| | - Fabian Holzmeier
- Institute
of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg
| | - Patrick Hemberger
- Molecular
Dynamics Group, Paul Scherrer Institut, CH-5232 Villigen
PSI, Switzerland
| | - Ingo Fischer
- Institute
of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg
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11
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Weinert C, Wezisla B, Lindner J, Vöhringer P. Ultrafast primary processes of the stable neutral organic radical, 1,3,5-triphenylverdazyl, in liquid solution. Phys Chem Chem Phys 2015; 17:13659-71. [DOI: 10.1039/c5cp01383f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Femtosecond pump–probe spectroscopy reveals ultrafast photochemical processes of a stable neutral organic radical in solution.
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Affiliation(s)
- Christoph Weinert
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Boris Wezisla
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Jörg Lindner
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Peter Vöhringer
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
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12
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Lang M, Holzmeier F, Fischer I, Hemberger P. Decomposition of diazomeldrum's acid: a threshold photoelectron spectroscopy study. J Phys Chem A 2014; 118:11235-43. [PMID: 25369422 DOI: 10.1021/jp509324w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Derivatives of meldrum's acid are known precursors for a number of reactive intermediates. Therefore, we investigate diazomeldrum's acid (DMA) and its pyrolysis products by photoionization using vacuum ultraviolet (VUV) synchrotron radiation. The threshold photoelectron spectrum of DMA yields an ionization energy (IE) of 9.68 eV. Several channels for dissociative photoionization are observed. The first one is associated with loss of CH3, leading to a daughter ion with m/z = 155. Its appearance energy AE0K was determined to be 10.65 eV by fitting the experimental data using statistical theory. A second parallel channel leads to m/z = 69, corresponding to N2CHCO, with an AE0K of 10.72 eV. Several other channels open up at higher energy, among them the formation of acetone cation, a channel expected to be the result of a Wolff-rearrangement (WR) in the cation. When diazomeldrum's acid is heated in a pyrolysis reactor, three thermal decomposition pathways are observed. The major one is well-known and yields acetone, N2 and CO as consequence of the WR. However, two further channels were identified: The formation of 2-diazoethenone, NNCCO, together with acetone and CO2 as the second channel and E-formylketene (OCCHCHCO), propyne, N2 and O2 as a third one. 2-Diazoethenone and E-formylketene were identified based on their threshold photoelectron spectra and accurate ionization energies could be determined. Ionization energies for several isomers of both molecules were also computed. One of the key findings of this study is that acetone is observed upon decomposition of DMA in the neutral as well as in the ion and both point to a Wolff rearrangement to occur. However, the ion is subject to other decomposition channels favored at lower internal energies.
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Affiliation(s)
- Melanie Lang
- Institute of Physical and Theoretical Chemistry, University of Würzburg , Am Hubland, D-97074 Würzburg, Germany
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13
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Holzmeier F, Lang M, Hemberger P, Bodi A, Schäfer M, Dewhurst RD, Braunschweig H, Fischer I. Photoionization and pyrolysis of a 1,4-azaborinine: retro-hydroboration in the cation and identification of novel organoboron ring systems. Chemistry 2014; 20:9683-92. [PMID: 24976576 DOI: 10.1002/chem.201402884] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Indexed: 12/30/2022]
Abstract
The photoionization and dissociative photoionization of 1,4-di-tert-butyl-1,4-azaborinine by means of synchrotron radiation and threshold photoelectron photoion coincidence spectroscopy is reported. The ionization energy of the compound was determined to be 7.89 eV. Several low-lying electronically excited states in the cation were identified. The various pathways for dissociative photoionization were modeled by statistical theory, and appearance energies AE0K were obtained. The loss of isobutene in a retro-hydroboration reaction is the dominant pathway, which proceeds with a reverse barrier. Pyrolysis of the parent compound in a chemical reactor leads to the generation of several yet unobserved boron compounds. The ionization energies of the C4 H6 BN isomers 1,2- and 1,4-dihydro-1,4-azaborinine and the C3 H6 BN isomer 1,2-dihydro-1,3-azaborole were determined from threshold photoelectron spectra.
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Affiliation(s)
- Fabian Holzmeier
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg (Germany)
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14
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Lang M, Holzmeier F, Fischer I, Hemberger P. Threshold Photoionization of Fluorenyl, Benzhydryl, Diphenylmethylene, and Their Dimers. J Phys Chem A 2013; 117:5260-8. [DOI: 10.1021/jp403158z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Melanie Lang
- Institute of Physical and Theoretical
Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Fabian Holzmeier
- Institute of Physical and Theoretical
Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ingo Fischer
- Institute of Physical and Theoretical
Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Patrick Hemberger
- Molecular Dynamics Group, Paul Scherrer Institut (PSI), CH-5232 Villigen PSI,
Switzerland
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15
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Holzmeier F, Lang M, Hader K, Hemberger P, Fischer I. H2CN+ and H2CNH+: New insight into the structure and dynamics from mass-selected threshold photoelectron spectra. J Chem Phys 2013; 138:214310. [DOI: 10.1063/1.4808050] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Fabian Holzmeier
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
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16
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Fischer KH, Hemberger P, Bodi A, Fischer I. Photoionisation of the tropyl radical. Beilstein J Org Chem 2013; 9:681-8. [PMID: 23616813 PMCID: PMC3629033 DOI: 10.3762/bjoc.9.77] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 03/13/2013] [Indexed: 11/23/2022] Open
Abstract
We present a study on the photoionisation of the cycloheptatrienyl (tropyl) radical, C7H7, using tunable vacuum ultraviolet synchrotron radiation. Tropyl is generated by flash pyrolysis from bitropyl. Ions and electrons are detected in coincidence, permitting us to record mass-selected photoelectron spectra. The threshold photoelectron spectrum of tropyl, corresponding to the X+ 1A1’ ← X2E2” transition, reveals an ionisation energy of 6.23 ± 0.02 eV, in good agreement with Rydberg extrapolations, but slightly lower than the value derived from earlier photoelectron spectra. Several vibrations can be resolved and are reassigned to the C–C stretch mode ν16+ and to a combination of ν16+ with the ring breathing mode ν2+. Above 10.55 eV dissociative photoionisation of tropyl is observed, leading to the formation of C5H5+ and C2H2.
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Affiliation(s)
- Kathrin H Fischer
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland Süd, 97074 Würzburg, Germany
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17
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Gao H, Lu Z, Yang L, Zhou J, Ng CY. Communication: A vibrational study of propargyl cation using the vacuum ultraviolet laser velocity-map imaging photoelectron method. J Chem Phys 2012; 137:161101. [PMID: 23126688 DOI: 10.1063/1.4764306] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
By employing the vacuum ultraviolet (VUV) laser velocity-map imaging photoelectron (VUV-VMI-PE) method, we have obtained a vibrationally resolved photoelectron spectrum of gaseous propargyl radical [C(3)H(3)(X(2)B(1))] in the energy range of 0-4600 cm(-1) above its ionization energy. The cold C(3)H(3) radicals were produced from a supersonically cooled radical beam source based on 193 nm ArF photodissociation of C(3)H(3)Cl. The VUV-VMI-PE spectrum of C(3)H(3) thus obtained reveals a Franck-Condon factor (FCF) pattern with a highly dominant origin band along with weak vibrational progressions associated with excitations of the C-C ν(5)(+)(a(1)) and C≡C ν(3)(+)(a(1)) symmetric stretching modes and the CCH ν(7)(+)(b(1)) out-of-plane bending mode of C(3)H(3)(+)(X(1)A(1)). The ν(5)(+)(a(1)) vibrational frequency of 1120 cm(-1) determined in the present study is lower than the value deduced from the recent Ar-tagged infrared photodissociation study by 102 cm(-1), confirming the highly accurate vibrational frequency predictions obtained by the most recent state-of-the-art ab initio quantum calculations. The observation of the FCF disallowed ν(7)(+)(b(1)) mode is indicative of vibronic interactions. The discrepancy observed between the FCF pattern determined in the present study and that predicted by a recent high-level quantum theoretical investigation can be taken as evidence that the potential energy surfaces used in the latter theoretical study are in need of improvement in order to provide a reliable FCF prediction for the C(3)H(3)/C(3)H(3)(+) photoionization system.
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Affiliation(s)
- Hong Gao
- Department of Chemistry, University of California, Davis, California 95616, USA
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18
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Savee JD, Soorkia S, Welz O, Selby TM, Taatjes CA, Osborn DL. Absolute photoionization cross-section of the propargyl radical. J Chem Phys 2012; 136:134307. [PMID: 22482552 DOI: 10.1063/1.3698282] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Using synchrotron-generated vacuum-ultraviolet radiation and multiplexed time-resolved photoionization mass spectrometry we have measured the absolute photoionization cross-section for the propargyl (C(3)H(3)) radical, σ(propargyl) (ion)(E), relative to the known absolute cross-section of the methyl (CH(3)) radical. We generated a stoichiometric 1:1 ratio of C(3)H(3):CH(3) from 193 nm photolysis of two different C(4)H(6) isomers (1-butyne and 1,3-butadiene). Photolysis of 1-butyne yielded values of σ(propargyl)(ion)(10.213 eV)=(26.1±4.2) Mb and σ(propargyl)(ion)(10.413 eV)=(23.4±3.2) Mb, whereas photolysis of 1,3-butadiene yielded values of σ(propargyl)(ion)(10.213 eV)=(23.6±3.6) Mb and σ(propargyl)(ion)(10.413 eV)=(25.1±3.5) Mb. These measurements place our relative photoionization cross-section spectrum for propargyl on an absolute scale between 8.6 and 10.5 eV. The cross-section derived from our results is approximately a factor of three larger than previous determinations.
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Affiliation(s)
- John D Savee
- Sandia National Laboratories, Combustion Research Facility, Livermore, California 94551, USA
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19
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Fischer KH, Herterich J, Fischer I, Jaeqx S, Rijs AM. Phenylpropargyl Radicals and Their Dimerization Products: An IR/UV Double Resonance Study. J Phys Chem A 2012; 116:8515-22. [PMID: 22830569 DOI: 10.1021/jp306075a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kathrin H. Fischer
- Institute
of Physical and Theoretical
Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Jörg Herterich
- Institute
of Physical and Theoretical
Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ingo Fischer
- Institute
of Physical and Theoretical
Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Sander Jaeqx
- FOM institute for plasma physics Rijnhuizen, Edisonbaan 14, 3934 MN Nieuwegein,
The Netherlands
| | - Anouk M. Rijs
- Radboud University Nijmegen, Institute for Molecules and Materials, Toernooiveld
7, 6525 ED Nijmegen, The Netherlands
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20
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Steinbauer M, Giegerich J, Fischer KH, Fischer I. The photodissociation dynamics of the ethyl radical, C2H5, investigated by velocity map imaging. J Chem Phys 2012; 137:014303. [DOI: 10.1063/1.4731285] [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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21
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Gao H, Xu Y, Yang L, Lam CS, Wang H, Zhou J, Ng CY. High-resolution threshold photoelectron study of the propargyl radical by the vacuum ultraviolet laser velocity-map imaging method. J Chem Phys 2011; 135:224304. [DOI: 10.1063/1.3664864] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Dopfer O, Andrei HS, Solcà N. IR Spectra of C2H5+-N2 Isomers: Evidence for Dative Chemical Bonding in the Isolated Ethanediazonium Ion. J Phys Chem A 2011; 115:11466-77. [DOI: 10.1021/jp208084r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
| | - Horia-Sorin Andrei
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
| | - Nicola Solcà
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
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23
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Gans B, Garcia GA, Boyé-Péronne S, Loison JC, Douin S, Gaie-Levrel F, Gauyacq D. Absolute Photoionization Cross Section of the Ethyl Radical in the Range 8–11.5 eV: Synchrotron and Vacuum Ultraviolet Laser Measurements. J Phys Chem A 2011; 115:5387-96. [DOI: 10.1021/jp202648m] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bérenger Gans
- Institut des Sciences Moléculaires d’Orsay, Université Paris-Sud 11, CNRS UMR 8214, F-91405 Orsay Cédex, France
| | - Gustavo A. Garcia
- Synchrotron SOLEIL, L'Orme des Merisiers, St Aubin, B.P. 48, F-91192 Gif-sur-Yvette Cédex, France
| | - Séverine Boyé-Péronne
- Institut des Sciences Moléculaires d’Orsay, Université Paris-Sud 11, CNRS UMR 8214, F-91405 Orsay Cédex, France
| | - Jean-Christophe Loison
- Institut des Sciences Moléculaires, Université Bordeaux I, CNRS UMR 5255, F-33405 Talence Cédex, France
| | - Stéphane Douin
- Institut des Sciences Moléculaires d’Orsay, Université Paris-Sud 11, CNRS UMR 8214, F-91405 Orsay Cédex, France
| | - François Gaie-Levrel
- Synchrotron SOLEIL, L'Orme des Merisiers, St Aubin, B.P. 48, F-91192 Gif-sur-Yvette Cédex, France
| | - Dolores Gauyacq
- Institut des Sciences Moléculaires d’Orsay, Université Paris-Sud 11, CNRS UMR 8214, F-91405 Orsay Cédex, France
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24
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Hemberger P, Lang M, Noller B, Fischer I, Alcaraz C, Cunha de Miranda BK, Garcia GA, Soldi-Lose H. Photoionization of Propargyl and Bromopropargyl Radicals: A Threshold Photoelectron Spectroscopic Study. J Phys Chem A 2011; 115:2225-30. [DOI: 10.1021/jp112110j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patrick Hemberger
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Melanie Lang
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Bastian Noller
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ingo Fischer
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Christian Alcaraz
- Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France
| | - Bárbara K. Cunha de Miranda
- Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France
- Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil
| | - Gustavo A. Garcia
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - Héloïse Soldi-Lose
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette Cedex, France
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25
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Botschwina P, Oswald R. Calculated photoelectron spectra of isotopomers of the propargyl radical (H2C3H): An explicitly correlated coupled cluster study. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.07.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Hemberger P, Noller B, Steinbauer M, Fischer I, Alcaraz C, Cunha de Miranda BK, Garcia GA, Soldi-Lose H. Threshold Photoelectron Spectroscopy of Cyclopropenylidene, Chlorocyclopropenylidene, and Their Deuterated Isotopomeres. J Phys Chem A 2010; 114:11269-76. [DOI: 10.1021/jp104019d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patrick Hemberger
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
| | - Bastian Noller
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
| | - Michael Steinbauer
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
| | - Ingo Fischer
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
| | - Christian Alcaraz
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
| | - Bárbara K. Cunha de Miranda
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
| | - Gustavo A. Garcia
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
| | - Héloïse Soldi-Lose
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil, and Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette, Cedex, France
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27
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Cunha de Miranda BK, Alcaraz C, Elhanine M, Noller B, Hemberger P, Fischer I, Garcia GA, Soldi-Lose H, Gans B, Vieira Mendes LA, Boyé-Péronne S, Douin S, Zabka J, Botschwina P. Threshold Photoelectron Spectroscopy of the Methyl Radical Isotopomers, CH3, CH2D, CHD2 and CD3: Synergy between VUV Synchrotron Radiation Experiments and Explicitly Correlated Coupled Cluster Calculations. J Phys Chem A 2010; 114:4818-30. [DOI: 10.1021/jp909422q] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bárbara K. Cunha de Miranda
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Christian Alcaraz
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Mohamed Elhanine
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Bastian Noller
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Patrick Hemberger
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Ingo Fischer
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Gustavo A. Garcia
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Héloïse Soldi-Lose
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Bérenger Gans
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Luiz A. Vieira Mendes
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Séverine Boyé-Péronne
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Stéphane Douin
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Jan Zabka
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
| | - Peter Botschwina
- Laboratoire de Chimie Physique, UMR 8000, CNRS et Université Paris-Sud 11, Bât. 350, Centre Universitaire Paris-Sud, F-91405 Orsay, France, Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil, Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, B.P. 48, F-91192 Gif sur Yvette Cedex, France, Institut des Sciences
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Gans B, Mendes LAV, Boyé-Péronne S, Douin S, Garcia G, Soldi-Lose H, de Miranda BKC, Alcaraz C, Carrasco N, Pernot P, Gauyacq D. Determination of the Absolute Photoionization Cross Sections of CH3 and I Produced from a Pyrolysis Source, by Combined Synchrotron and Vacuum Ultraviolet Laser Studies. J Phys Chem A 2009; 114:3237-46. [DOI: 10.1021/jp909414d] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bérenger Gans
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Luiz A. Vieira Mendes
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Séverine Boyé-Péronne
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Stéphane Douin
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Gustavo Garcia
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Héloïse Soldi-Lose
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Barbara K. Cunha de Miranda
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Christian Alcaraz
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Nathalie Carrasco
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Pascal Pernot
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
| | - Dolores Gauyacq
- Laboratoire de Photophysique Moléculaire, CNRS UPR 3361, Univ. Paris-Sud 11, Bât. 210, F-91405 Orsay Cédex, France
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Hemberger P, Steinbauer M, Schneider M, Fischer I, Johnson M, Bodi A, Gerber T. Photoionization of Three Isomers of the C9H7 Radical. J Phys Chem A 2009; 114:4698-703. [DOI: 10.1021/jp9068569] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick Hemberger
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, and Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Michael Steinbauer
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, and Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Michael Schneider
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, and Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Ingo Fischer
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, and Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Melanie Johnson
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, and Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Andras Bodi
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, and Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Thomas Gerber
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany, and Paul Scherrer Institut, Villigen 5232, Switzerland
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30
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Li Y, Liu HL, Huang XR, Sun YB, Li Z, Sun CC. Radical-molecule reaction C(3P) + C3H6: mechanistic study. J Phys Chem A 2009; 113:10577-87. [PMID: 19731902 DOI: 10.1021/jp903844p] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The complex triplet potential energy surface for the reaction of ground-state atomic carbon C(3P) with propylene C3H6 is explored at the B3LYP/6-311G(d,p), QCISD/6-311G(d,p), and G3B3 (single-point) levels. Various possible reaction pathways are probed. It is shown that the reaction is initiated by the addition of C(3P) to the C=C bond of C3H6 to generate barrierlessly the three-membered ring isomer 1 CH3-cCHCCH2, followed by the ring-opening process to form 2a trans-CH3CHCCH2, which can easily interconvert to 2b cis-CH3CHCCH2. Starting from 2 (2a, 2b), the most feasible pathway is the internal C-H bond rupture of 2a leading to P4(2CH3CCCH2 + 2H), terminal C-H bond cleavage of 2 (2a,2b) to form P5(2CH3CHCCH + 2H), or direct C-C bond fission of 2b to form P7(2CH2CCH + 2CH3), all of which may have comparable contributions to the title reaction. Much less competitively, 2a takes a 1,2-H-shift to form 5a trans-cis-CH3CHCHCH, followed by a C-C bond rupture leading to P6(1C2H2 + 3CH3CH). Because the intermediates and transition states involved in the feasible pathways all lie below the reactant, the title reaction is expected to be rapid, which is consistent with the measured large rate constant. The present article may provide some useful information for future experimental investigation of the title reaction.
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Affiliation(s)
- Yan Li
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
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Noller B, Hemberger P, Fischer I, Alcaraz C, Garcia GA, Soldi-Lose H. The photoionisation of two phenylcarbenes and their diazirine precursors investigated using synchrotron radiation. Phys Chem Chem Phys 2009; 11:5384-91. [DOI: 10.1039/b823269e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Groß C, Noller B, Fischer I. On the photodissociation of propadienylidene, l-C3H2. Phys Chem Chem Phys 2008; 10:5196-201. [DOI: 10.1039/b807049k] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Fan H, Pratt ST. Photodissociation of propargyl bromide and photoionization of the propargyl radical. J Chem Phys 2006; 124:144313. [PMID: 16626202 DOI: 10.1063/1.2187975] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Velocity map imaging was used to study the 193 nm photodissociation of propargyl bromide C(3)H(3)Br as well as the photoionization dynamics of the resulting propargyl radical C(3)H(3). Images were recorded by using single-photon vacuum ultraviolet ionization of the propargyl radical and by using two-photon resonant, three-photon ionization of the ground state Br((2)P(32)) and spin-orbit excited Br(*)((2)P(12)) atoms. Analysis of these data allowed the determination of the branching ratio Br:Br(*) as well as the photofragment angular distributions. Images of C(3)H(3) produced by the photodissociation of both C(3)H(3)Br and C(3)H(3)Cl were recorded at several energies between 8.97 and 9.12 eV, as well as at 9.86 eV, and showed no obvious internal energy dependence of the relative photoionization cross sections.
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Affiliation(s)
- H Fan
- Argonne National Laboratory, Argonne, Illinois 60439, USA
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Fan H, Pratt ST. Near-threshold photoionization of hot isopropyl radicals. J Chem Phys 2006; 124:114312. [PMID: 16555893 DOI: 10.1063/1.2172611] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A combination of ion imaging and vacuum ultraviolet, single-photon ionization is used to study the internal energy dependence of the photoionization cross section of isopropyl radicals produced by the 266 nm photodissociation of isopropyl iodide. The isopropyl radicals so produced have internal energies of approximately 0.3-2.0 eV. Images recorded for photoionization energies from just below the adiabatic ionization threshold at 7.37+/-0.02 and 8.04 eV are essentially identical both to each other and to that recorded at 9.67 eV. These results imply that the photoionization cross section is only weakly dependent on internal energy. Several factors contributing to this observation are discussed, as are the implications for the photoionization of other systems with significant internal excitation.
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Affiliation(s)
- H Fan
- Argonne National Laboratory, Argonne, Illinois 60439, USA
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Kovacev M, Fomichev SV, Priori E, Mairesse Y, Merdji H, Monchicourt P, Breger P, Norin J, Persson A, L'Huillier A, Wahlström CG, Carré B, Salières P. Extreme ultraviolet Fourier-transform spectroscopy with high order harmonics. PHYSICAL REVIEW LETTERS 2005; 95:223903. [PMID: 16384221 DOI: 10.1103/physrevlett.95.223903] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Indexed: 05/05/2023]
Abstract
We demonstrate a new scheme for extreme ultraviolet (xuv) Fourier-transform spectroscopy based on the generation of two phase-locked high-harmonic beams. It allows us to measure for the first time interferograms at wavelengths as short as 90 nm, and open the perspective of performing high-resolution Fourier-transform absorption spectroscopy in the xuv. Our measurements also demonstrate that a precise control of the relative phase of harmonic pulses can be obtained with an accuracy on an attosecond time scale, of importance for future xuv pump-xuv probe attosecond spectroscopy.
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Affiliation(s)
- M Kovacev
- CEA/DSM/DRECAM/SPAM, bât. 522, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette, France
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Lau KC, Ng CY. Accurate ab initio predictions of ionization energies of hydrocarbon radicals: CH2, CH3, C2H, C2H3, C2H5, C3H3, and C3H5. J Chem Phys 2005; 122:224310. [PMID: 15974671 DOI: 10.1063/1.1926274] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The ionization energies for methylene (CH2), methyl (CH3), ethynyl (C2H), vinyl (C2H3), ethyl (C2H5), propargyl (C3H3), and allyl (C3H5) radicals have been calculated by the wave-function-based ab initio CCSD(T)/CBS approach, which involves the approximation to the complete basis set (CBS) limit at the coupled-cluster level with single and double excitations plus a quasiperturbative triple excitation [CCSD(T)]. When it is appropriate, the zero-point vibrational energy correction, the core-valence electronic correction, the scalar relativistic effect correction, the diagonal Born-Oppenheimer correction, and the high-order correlation correction have also been made in these calculations. The comparison between the computed ionization energy (IE) values and the highly precise experimental IE values determined in previous pulsed field ionization-photoelectron (PFI-PE) studies indicates that the CCSD(T)/CBS method is capable of providing accurate IE predictions for these hydrocarbon radicals achieving error limits well within +/-10 meV. The benchmarking of the CCSD(T)/CBS IE predictions by the PFI-PE experimental results also lends strong support for the conclusion that the CCSD(T)/CBS approach with high-level energy corrections can serve as a valuable alternative for reliable IE determination of radicals, particularly for those radicals with very unfavorable Franck-Condon factors for photoionization transitions near their ionization thresholds.
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Affiliation(s)
- K-C Lau
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, USA
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