1
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Del Fré S, Santamaría AR, Duflot D, Basalgète R, Féraud G, Bertin M, Fillion JH, Monnerville M. Mechanism of Ultraviolet-Induced CO Desorption from CO Ice: Role of Vibrational Relaxation Highlighted. Phys Rev Lett 2023; 131:238001. [PMID: 38134796 DOI: 10.1103/physrevlett.131.238001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 10/13/2023] [Indexed: 12/24/2023]
Abstract
Although UV photon-induced CO ice desorption is clearly observed in many cold regions of the Universe as well as in the laboratory, the fundamental question of the mechanisms involved at the molecular scale remains debated. In particular, the exact nature of the involved energy transfers in the indirect desorption pathway highlighted in previous experiments is not explained. Using ab initio molecular dynamics simulations, we explore a new indirect desorption mechanism in which a highly vibrationally excited CO (v=40) within an aggregate of 50 CO molecules triggers the desorption of molecules at the surface. The desorption originates first from a mutual attraction between the excited molecule and the surrounding molecule(s), followed by a cascade of energy transfers, ultimately resulting in the desorption of vibrationally cold CO (∼95% in v=0). The theoretical vibrational distribution, along with the kinetic energy one, which peaks around 25 meV for CO with low rotational levels (v=0, J<7), is in excellent agreement with the results obtained from VUV laser induced desorption (157 nm) of CO (v=0, 1) probed using REMPI.
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Affiliation(s)
- Samuel Del Fré
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | | | - Denis Duflot
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | - Romain Basalgète
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - Géraldine Féraud
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - Mathieu Bertin
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - Jean-Hugues Fillion
- Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005 Paris, France
| | - Maurice Monnerville
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers Atomes et Molécules, F-59000 Lille, France
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2
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Lange E, Lozano AI, Jones NC, Hoffmann SV, Kumar S, Śmiałek MA, Duflot D, Brunger MJ, Limão-Vieira P. Absolute Photoabsorption Cross-Sections of Methanol for Terrestrial and Astrophysical Relevance. J Phys Chem A 2020; 124:8496-8508. [PMID: 32941031 DOI: 10.1021/acs.jpca.0c06615] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We investigate the methanol absorption spectrum in the range 5.5-10.8 eV to provide accurate and absolute cross-sections values. The main goal of this study is to provide a comprehensive analysis of methanol electronic-state spectroscopy by employing high-resolution vacuum ultraviolet (VUV) photoabsorption measurements together with state-of-the-art quantum chemical calculation methods. The VUV spectrum reveals several new features that are not previously reported in literature, for n > 3 in the transitions (nsσ(a') ← (2a″)) (1A' ← X̃1A') and (nsσ, npσ, npσ', ndσ ← (7a')) (1A' ← X̃1A'), and with particular relevance to vibrational progressions of the CH3 rocking mode, v11'(a″), mode in the (3pπ(a″) ← (2a″)) (21A' ← X̃1A') absorption band at 8.318 eV. The measured absolute photoabsorption cross-sections have subsequently been used to calculate the photolysis lifetime of methanol in the Earth's atmosphere from the ground level up to the limit of the stratosphere (50 km altitude). This shows that solar photolysis plays a negligible role in the removal of methanol from the lower atmosphere compared with competing sink mechanisms. Torsional potential energy scans, as a function of the internal rotation angle for the ground and first Rydberg states, have also been calculated as part of this investigation.
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Affiliation(s)
- Emanuele Lange
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Caparica 2829-516, Portugal
| | - Ana Isabel Lozano
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Caparica 2829-516, Portugal
| | - Nykola C Jones
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Århus C DK-8000, Denmark
| | - Søren Vrønning Hoffmann
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Århus C DK-8000, Denmark
| | - Sarvesh Kumar
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Caparica 2829-516, Portugal
| | - Małgorzata A Śmiałek
- Department of Control and Power Engineering, Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, Gabriela Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Denis Duflot
- UMR 8523 - Physique des Lasers Atomes et Molécules, Univ. Lille, Lille F-59000, France.,CNRS, UMR 8523, Lille F-59000, France
| | - Michael J Brunger
- College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia.,Department of Actuarial Science and Applied Statistics, Faculty of Business and Management, UCSI, Kuala Lumpur 56000, Malaysia
| | - Paulo Limão-Vieira
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Caparica 2829-516, Portugal
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3
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Limão-Vieira P, Jones NC, Hoffmann SV, Duflot D, Mendes M, Lozano AI, Ferreira da Silva F, García G, Hoshino M, Tanaka H. Revisiting the photoabsorption spectrum of NH 3 in the 5.4-10.8 eV energy region. J Chem Phys 2019; 151:184302. [PMID: 31731857 DOI: 10.1063/1.5128051] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a comprehensive revisited experimental high-resolution vacuum ultraviolet (VUV) photoabsorption spectrum of ammonia, NH3, covering for the first time the full 5.4-10.8 eV energy-range, with absolute cross sections determined. The calculations on the vertical excitation energies and oscillator strengths were performed using the equation-of-motion coupled cluster method restricted to single and double excitation levels and used to help reanalyze the observed Rydberg structures in the photoabsorption spectrum. The VUV spectrum reveals several new features that are not previously reported in the literature, with particular reference to the vibrational progressions of the (D̃1E'←X̃1A1 '), the (F̃1E'←X̃1A1 '), and the (G̃1A2 ″←X̃1A1 ') absorption bands. In addition, new Rydberg members have been identified in nda1 '←1a2 ″D̃''1A2 ″←X̃1A1 ', where n > 3 has not been reported before as well as in nde″←1a2 ″F̃1E'←X̃1A1 ' and in nsa1 '←1a2 ″G̃1A2 ″←X̃1A1 '. The measured absolute photoabsorption cross sections have been used to calculate the photolysis lifetime of ammonia in the Earth's atmosphere (0-50 km).
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Affiliation(s)
- P Limão-Vieira
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - N C Jones
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - S V Hoffmann
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - D Duflot
- Univ. Lille, UMR 8523 - Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | - M Mendes
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - A I Lozano
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - F Ferreira da Silva
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - G García
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (CSIC), Serrano 113-bis, 28006 Madrid, Spain
| | - M Hoshino
- Department of Physics, Sophia University, Tokyo 102-8554, Japan
| | - H Tanaka
- Department of Physics, Sophia University, Tokyo 102-8554, Japan
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4
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Douix S, Dossmann H, Nicol E, Duflot D, Giuliani A. Spectroscopy and Photodissociation of the Perfluorooctanoate Anion. Chemistry 2018; 24:15572-15576. [PMID: 29972252 DOI: 10.1002/chem.201801997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 07/03/2018] [Indexed: 11/07/2022]
Abstract
Perfluorocarbons, a class of fully fluorinated compounds, are highly persistent and toxic pollutants that are receiving increasing attention due to their widespread environmental distribution. In this study, attention was focused on one compound in particular, namely, perfluorooctanoic acid (PFOA). The first investigation of the UV/VUV photochemistry of the PFOA anion in the gas phase by action spectroscopy of selected ions is reported. Two main relaxation channels were identified: photodissociation and photodetachment. Absolute cross sections for the individual observed processes were measured. DFT calculations and natural transition orbital analysis were carried out to help in the interpretation of the experimental results.
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Affiliation(s)
- Suzie Douix
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin BP48, 91192, Gif-sur-Yvette, France.,Sorbonne Université, CNRS, Institut Parisien de, Chimie Moléculaire, IPCM, 75005, Paris, France
| | - Héloïse Dossmann
- Sorbonne Université, CNRS, Institut Parisien de, Chimie Moléculaire, IPCM, 75005, Paris, France
| | - Edith Nicol
- Laboratoire de Chimie Moléculaire, Ecole polytechnique, CNRS, Université Paris-Saclay, 91128, Palaiseau, France
| | - Denis Duflot
- Univ. Lille, UMR 8523-Physique des Lasers, Atomes et Molécules, 59000, Lille, France
| | - Alexandre Giuliani
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin BP48, 91192, Gif-sur-Yvette, France.,CEPIA, INRA, BP 71627, 44316, Nantes, France
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5
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Goupy P, Carail M, Giuliani A, Duflot D, Dangles O, Caris-Veyrat C. Carotenoids: Experimental Ionization Energies and Capacity at Inhibiting Lipid Peroxidation in a Chemical Model of Dietary Oxidative Stress. J Phys Chem B 2018; 122:5860-5869. [PMID: 29771123 DOI: 10.1021/acs.jpcb.8b03447] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Carotenoids are important natural pigments and micronutrients contributing to health prevention by several mechanisms, including their electron-donating (antioxidant) activity. In this work, a large series of carotenoids, including 11 carotenes and 14 xanthophylls, have been investigated by wavelength-resolved atmospheric pressure photoionization mass spectrometry (DISCO line of SOLEIL synchrotron), thus allowing the experimental determination of their ionization energy (IE) for the first time. On the other hand, the carotenoids have been also investigated for their ability to inhibit the heme iron-induced peroxidation of linoleic acid in mildly acidic micelles, a simple but relevant chemical model of oxidative stress in the gastric compartment. Thus, the carotenoids can be easily classified from IC50 concentrations deduced from the time dependence of the lipid hydroperoxide concentration. With a selection of two carotenes and three xanthophylls a quantitative analysis is also provided to extract stoichio-kinetic parameters. The influence of the carotenoid structure (number of conjugated carbon-carbon double bonds, presence of terminal six-membered rings, hydroxyl, keto, and/or epoxy groups) on the IE, IC50, and stoichio-kinetic parameters is discussed in details. The data show that the antioxidant activity of carotenes is well correlated to their electron-donating capacity, which itself largely depends on the length of the conjugated polyene chain. By contrast, the IE of xanthophylls is poorly correlated to the polyene chain length because of the strong, and sometimes unexpected, electronic effects of the O-atoms. Although IE remains an approximate predictor of the antioxidant activity of xanthophylls, other factors (interaction with the aqueous phase, competing radical-scavenging mechanisms, the residual activity of the antioxidant's oxidation products) probably play a significant role.
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Affiliation(s)
- Pascale Goupy
- INRA, UMR408 SQPOV , 84000 Avignon , France.,Avignon University, UMR408 SQPOV , 84000 Avignon , France
| | - Michel Carail
- INRA, UMR408 SQPOV , 84000 Avignon , France.,Avignon University, UMR408 SQPOV , 84000 Avignon , France
| | - Alexandre Giuliani
- Synchrotron SOLEIL , St-Aubin, BP48 , 91192 Gif sur Yvette Cedex, France.,INRA, U1008 , BP 71627 , 44316 Nantes , France
| | - Denis Duflot
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523 , Université Lille1 , 59655 Villeneuve d'Ascq Cedex, France
| | - Olivier Dangles
- INRA, UMR408 SQPOV , 84000 Avignon , France.,Avignon University, UMR408 SQPOV , 84000 Avignon , France
| | - Catherine Caris-Veyrat
- INRA, UMR408 SQPOV , 84000 Avignon , France.,Avignon University, UMR408 SQPOV , 84000 Avignon , France
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6
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Hoshino M, Duflot D, Limão-Vieira P, Ohtomi S, Tanaka H. Experimental scaling of plane-Born cross sections and ab initio assignments for electron-impact excitation and dissociation of XF 4 (X = C, Si, and Ge) molecules. J Chem Phys 2017; 146:144306. [PMID: 28411616 DOI: 10.1063/1.4979299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Electron energy loss spectra of carbon tetrafluoride, silicon tetrafluoride, and germanium tetrafluoride molecules (CF4, SiF4, and GeF4) have been measured for incident electron energies of 50-360 eV at 1.5°-15.5° and for 30 eV and 30° scattering angle, while sweeping the energy loss over the range 9.0-20.0 eV. Low-lying valence excited triplet and singlet states are investigated by quantum chemical ab initio calculations. The Rydberg series converging to the (lowest) ionisation energy limits of XF4 (X = C, Si, Ge) are also identified and classified using the systematic behaviour according to the magnitude of the quantum defects. A generalized oscillator strength analysis is employed to derive oscillator strength f0 value and the apparent Born integral cross sections from the corresponding differential cross sections by using the Vriens formula for the optically allowed transitions. The f0 value is compared with the optical oscillator strength of the photoabsorption, pseudo-photon measurements, and theoretical values. The binary-encounter and f-scaled Born cross sections of the most intense optically allowed transitions have been also derived from the excitation threshold to the high energy region where the Born approximation is valid. Potential energy curves were obtained along the XF3 + F coordinate with two different basis sets to lend support on electron impact dissociation processes yielding radical formation. We found that in CF4, the lowest-lying dissociative character is due to intramolecular conversion from Rydberg 3s to valence character (σ*(C-F)), whereas in SiF4 and GeF4, an antibonding behaviour prevails.
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Affiliation(s)
- M Hoshino
- Department of Physics, Sophia University, Tokyo 102-8554, Japan
| | - D Duflot
- UMR 8523 - Physique des Lasers Atomes et Molécules, Université de Lille, F-59000 Lille, France
| | - P Limão-Vieira
- Department of Physics, Sophia University, Tokyo 102-8554, Japan
| | - S Ohtomi
- Department of Physics, Sophia University, Tokyo 102-8554, Japan
| | - H Tanaka
- Department of Physics, Sophia University, Tokyo 102-8554, Japan
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7
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Limão-Vieira P, Duflot D, Ferreira da Silva F, Lange E, Jones NC, Hoffmann SV, Śmiałek MA, Jones DB, Brunger MJ. Valence and lowest Rydberg electronic states of phenol investigated by synchrotron radiation and theoretical methods. J Chem Phys 2017; 145:034302. [PMID: 27448882 DOI: 10.1063/1.4955334] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present the experimental high-resolution vacuum ultraviolet (VUV) photoabsorption spectra of phenol covering for the first time the full 4.3-10.8 eV energy-range, with absolute cross sections determined. Theoretical calculations on the vertical excitation energies and oscillator strengths were performed using time-dependent density functional theory and the equation-of-motion coupled cluster method restricted to single and double excitations level. These have been used in the assignment of valence and Rydberg transitions of the phenol molecule. The VUV spectrum reveals several new features not previously reported in the literature, with particular reference to the 6.401 eV transition, which is here assigned to the 3sσ/σ(∗)(OH)←3π(3a″) transition. The measured absolute photoabsorption cross sections have been used to calculate the photolysis lifetime of phenol in the earth's atmosphere (0-50 km).
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Affiliation(s)
- P Limão-Vieira
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - D Duflot
- Univ. Lille, UMR 8523-Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | - F Ferreira da Silva
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - E Lange
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - N C Jones
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - S V Hoffmann
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - M A Śmiałek
- Department of Control and Power Engineering, Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - D B Jones
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
| | - M J Brunger
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
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8
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Abstract
Photoionization of a buckminsterfullerene ion is investigated using an ion trap and a merged beam setup coupled to synchrotron radiation beamlines and compared to theoretical calculations. Absolute measurements derived from the ion trap experiment allow discrepancies concerning the photoionization cross section of C60+ to be solved.
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Affiliation(s)
- Suzie Douix
- Synchrotron SOLEIL , L'Orme des Merisiers, 91192 Saint Aubin, Gif-sur-Yvette, France
| | - Denis Duflot
- Univsité Lille, UMR 8523 - Physique des Lasers, Atomes et Molécules , F-59000 Lille, France
- CNRS, UMR 8523 , F-59000 Lille, France
| | - Denis Cubaynes
- Synchrotron SOLEIL , L'Orme des Merisiers, 91192 Saint Aubin, Gif-sur-Yvette, France
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | - Jean-Marc Bizau
- Synchrotron SOLEIL , L'Orme des Merisiers, 91192 Saint Aubin, Gif-sur-Yvette, France
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | - Alexandre Giuliani
- Synchrotron SOLEIL , L'Orme des Merisiers, 91192 Saint Aubin, Gif-sur-Yvette, France
- UAR 1008 CEPIA, INRA , F-44316 Nantes, France
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9
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Lovrić J, Duflot D, Monnerville M, Toubin C, Briquez S. Water-Induced Organization of Palmitic Acid at the Surface of a Model Sea Salt Particle: A Molecular Dynamics Study. J Phys Chem A 2016; 120:10141-10149. [DOI: 10.1021/acs.jpca.6b07792] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Josip Lovrić
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Denis Duflot
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Maurice Monnerville
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Céline Toubin
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
| | - Stéphane Briquez
- Laboratoire de
Physique des Lasers, Atomes et Molécules (PhLAM) CNRS, UMR
8523, Univ. Lille, F-59000 Lille, France
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10
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Ohtomi S, Hoshino M, Suga A, Kato H, Duflot D, Limão-Vieira P, Tanaka H. Studies on GeF 4 Valence and Rydberg States by Electron Impact Spectroscopy and Ab Initio Calculations. J Phys Chem A 2016; 120:9170-9177. [PMID: 27783519 DOI: 10.1021/acs.jpca.6b09138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electron energy loss (EEL) spectra of GeF4 have been measured with incident electrons at 100 eV for 5° scattering angle and at 30 eV for 30° scattering angle, while sweeping the energy loss over the range 7.0-18.0 eV. Low-lying excited triplet, singlet, valence, and Rydberg states are investigated and the assignments supported by quantum chemical ab initio calculations. This provides the first comprehensive investigation of all singlet and triplet excited electronic states of germanium tetrafluoride up to the first ionization energy. The Rydberg series converging to the (lowest) ionization energy limits of GeF4 are also identified according to the magnitude of the quantum defects (δ).
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Affiliation(s)
- S Ohtomi
- Department of Physics, Sophia University , Tokyo 102-8554, Japan
| | - M Hoshino
- Department of Physics, Sophia University , Tokyo 102-8554, Japan
| | - A Suga
- Department of Physics, Sophia University , Tokyo 102-8554, Japan
| | - H Kato
- Department of Physics, Sophia University , Tokyo 102-8554, Japan
| | - D Duflot
- Université de Lille, UMR 8523 - Physique des Lasers Atomes et Molécules , F-59000 Lille, France.,CNRS, UMR 8523 , F-59000 Lille, France
| | - P Limão-Vieira
- Department of Physics, Sophia University , Tokyo 102-8554, Japan.,Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa , 2829-516 Caparica, Portugal
| | - H Tanaka
- Department of Physics, Sophia University , Tokyo 102-8554, Japan
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11
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Bailleux S, Duflot D, Aiba S, Nakahama S, Ozeki H. Nitrosyl iodide, INO: A combined ab initio and high-resolution spectroscopic study. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.02.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Serralheiro C, Duflot D, da Silva FF, Hoffmann SV, Jones NC, Mason NJ, Mendes B, Limão-Vieira P. Toluene Valence and Rydberg Excitations as Studied by ab initio Calculations and Vacuum Ultraviolet (VUV) Synchrotron Radiation. J Phys Chem A 2015; 119:9059-69. [PMID: 26244250 DOI: 10.1021/acs.jpca.5b05080] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electronic spectroscopy of isolated toluene in the gas phase has been investigated using high-resolution photoabsorption spectroscopy in the 4.0-10.8 eV energy range, with absolute cross-section measurements derived. We present the first set of ab initio calculations (vertical energies and oscillator strengths), which we use in the assignment of valence and Rydberg transitions of the toluene molecule. The spectrum reveals several new features not previously reported in the literature, with particular relevance to 7.989 and 8.958 eV, which are here tentatively assigned to the π*(17a') ← σ(15a') and 1π*(10a″) ← 1π(14a') transitions, respectively. The measured absolute photoabsorption cross sections have been used to calculate the photolysis lifetime of toluene in the upper stratosphere (20-50 km).
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Affiliation(s)
- C Serralheiro
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal.,Centro de Engenharia Mecânica e Sustentabilidade de Recursos (MEtRICs), Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - D Duflot
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université de Lille , F-59655 Villeneuve d'Ascq Cedex, France
| | - F Ferreira da Silva
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - S V Hoffmann
- ISA, Department of Physics and Astronomy, Aarhus University , Ny Munkegade 120, DK-8000, Aarhus C, Denmark
| | - N C Jones
- ISA, Department of Physics and Astronomy, Aarhus University , Ny Munkegade 120, DK-8000, Aarhus C, Denmark
| | - N J Mason
- Department of Physical Sciences, The Open University , Walton Hall, Milton Keynes, MK7 6AA, U.K
| | - B Mendes
- Centro de Engenharia Mecânica e Sustentabilidade de Recursos (MEtRICs), Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - P Limão-Vieira
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal.,Department of Physical Sciences, The Open University , Walton Hall, Milton Keynes, MK7 6AA, U.K
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13
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da Silva FF, Duflot D, Hoffmann SV, Jones NC, Rodrigues FN, Ferreira-Rodrigues AM, de Souza GGB, Mason NJ, Eden S, Limão-Vieira P. Electronic State Spectroscopy of Halothane As Studied by ab Initio Calculations, Vacuum Ultraviolet Synchrotron Radiation, and Electron Scattering Methods. J Phys Chem A 2015; 119:8503-11. [PMID: 26171941 DOI: 10.1021/acs.jpca.5b05308] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present the first set of ab initio calculations (vertical energies and oscillator strengths) of the valence and Rydberg transitions of the anaesthetic compound halothane (CF3CHBrCl). These results are complemented by high-resolution vacuum ultraviolet photoabsorption measurements over the wavelength range 115-310 nm (10.8-4.0 eV). The spectrum reveals several new features that were not previously reported in the literature. Spin-orbit effects have been considered in the calculations for the lowest-lying states, allowing us to explain the broad nature of the 6.1 and 7.5 eV absorption bands assigned to σ*(C-Br) ← nBr and σ*(C-Cl) ← n(Cl) transitions. Novel absolute photoabsorption cross sections from electron scattering data were derived in the 4.0-40.0 eV range. The measured absolute photoabsorption cross sections have been used to calculate the photolysis lifetime of halothane in the upper stratosphere (20-50 km).
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Affiliation(s)
- F Ferreira da Silva
- †Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - D Duflot
- ‡Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université de Lille, F-59655 Villeneuve d' Ascq Cedex, France
| | - S V Hoffmann
- §ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - N C Jones
- §ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - F N Rodrigues
- ∥Instituto de Química, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil.,⊥Departamento da Ciência da Natureza e Matemática, Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Maracanã, 20270-021 Rio de Janeiro, RJ, Brazil
| | - A M Ferreira-Rodrigues
- ∥Instituto de Química, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil.,#DCN, Instituto de Biociências, Universidade Federal do Estado do Rio de Janeiro, Urca, 22290-240 Rio de Janeiro, RJ, Brazil
| | - G G B de Souza
- ∥Instituto de Química, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil
| | - N J Mason
- ∇Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, U.K
| | - S Eden
- ∇Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, U.K
| | - P Limão-Vieira
- †Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.,∇Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, U.K
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14
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Hormain L, Monnerville M, Toubin C, Duflot D, Pouilly B, Briquez S, Bernal-Uruchurtu MI, Hernández-Lamoneda R. Ground state analytical ab initio intermolecular potential for the Cl 2-water system. J Chem Phys 2015; 142:144310. [DOI: 10.1063/1.4917028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Bailleux S, Duflot D, Taniguchi K, Sakai S, Ozeki H, Okabayashi T, Bailey WC. Fourier Transform Microwave and Millimeter-Wave Spectroscopy of Bromoiodomethane, CH2BrI. J Phys Chem A 2014; 118:11744-50. [DOI: 10.1021/jp510119e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Bailleux
- Laboratoire
de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Université de Lille, F-59655 Villeneuve d’Ascq
Cedex, France
| | - D. Duflot
- Laboratoire
de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Université de Lille, F-59655 Villeneuve d’Ascq
Cedex, France
| | - K. Taniguchi
- Department
of Environmental Science, Faculty of Science, Toho University, 2-2-1
Miyama, Funabashi 274-8510, Japan
| | - S. Sakai
- Department
of Environmental Science, Faculty of Science, Toho University, 2-2-1
Miyama, Funabashi 274-8510, Japan
| | - H. Ozeki
- Department
of Environmental Science, Faculty of Science, Toho University, 2-2-1
Miyama, Funabashi 274-8510, Japan
| | - T. Okabayashi
- Graduate
School of Science and Technology, Shizuoka University, Oya 836,
Surugaku, Shizuoka 422-8529, Japan
| | - W. C. Bailey
- Chemistry-Physics
Department, Kean University, Union, New Jersey 07083, United States
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16
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Duflot D, Hoshino M, Limão-Vieira P, Suga A, Kato H, Tanaka H. BF3 valence and Rydberg states as probed by electron energy loss spectroscopy and ab initio calculations. J Phys Chem A 2014; 118:10955-66. [PMID: 25338148 DOI: 10.1021/jp509375y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this contribution we probe BF3 low-lying excited singlet states measured at 100 eV, 2.8° scattering angle and triplet states at 40 eV, 40° scattering angle, while sweeping the energy loss over the range 10.0-20.0 eV. The electronic state spectroscopy has been investigated and the assignments supported by quantum chemical calculations. This provides the first comprehensive investigation of all singlet and triplet excited electronic states of boron trifluoride up to the first ionization potential. A generalized oscillator strength analysis is employed to derive oscillator strength f0 value and integral cross sections (ICSs) from the corresponding differential cross sections (DCSs). The f0 value is compared with the optical oscillator strength (OOS) from photoabsorption, and the unscaled Born ICSs are then compared with relevant energy and binary-encounter and f-scaled Born cross section (BEf-scaling) results determined as a part of this investigation. The lowest n members of the Rydberg series have been assigned as converging to the lowest ionization energy limits of boron trifluoride and classified according to the magnitude of the quantum defects (δ).
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Affiliation(s)
- D Duflot
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université de Lille , F-59655 Villeneuve d' Ascq Cedex, France
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17
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Śmiałek MA, Łabuda M, Guthmuller J, Hubin-Franskin MJ, Delwiche J, Duflot D, Mason NJ, Hoffmann SV, Jones NC, Limão-Vieira P. Valence and ionic lowest-lying electronic states of ethyl formate as studied by high-resolution vacuum ultraviolet photoabsorption, He(I) photoelectron spectroscopy, and ab initio calculations. J Chem Phys 2014; 141:104311. [DOI: 10.1063/1.4894762] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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18
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Limão-Vieira P, Duflot D, Hubin-Franskin MJ, Delwiche J, Hoffmann SV, Chiari L, Jones DB, Brunger MJ, Lopes MCA. Electronic states of tetrahydrofurfuryl alcohol (THFA) as studied by VUV spectroscopy and ab initio calculations. J Phys Chem A 2014; 118:6425-34. [PMID: 24742321 DOI: 10.1021/jp501634w] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The electronic spectroscopy of isolated tetrahydrofurfuryl alcohol (THFA) in the gas phase has been investigated using high-resolution photoabsorption spectroscopy in the 5.0-10.8 eV energy-range, with absolute cross-section measurements derived. The He(I) photoelectron spectrum was also collected to quantify ionization energies in the 9-16 eV spectral region. These experiments are supported by the first high-level ab initio calculations performed on the excited states of the neutral molecule and on the ground and excited state of the positive ion. The good agreement between the theoretical results and the measurements allows us to quantify for the first time the electronic-state spectroscopy of THFA. The present work also considers the question of the lowest energy conformers of the molecule and its population distribution at room temperature.
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Affiliation(s)
- P Limão-Vieira
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
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19
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Chiari L, Duque HV, Jones DB, Thorn PA, Pettifer Z, da Silva GB, Limão-Vieira P, Duflot D, Hubin-Franskin MJ, Delwiche J, Blanco F, García G, Lopes MCA, Ratnavelu K, White RD, Brunger MJ. Differential cross sections for intermediate-energy electron scattering from α-tetrahydrofurfuryl alcohol: excitation of electronic-states. J Chem Phys 2014; 141:024301. [PMID: 25028013 DOI: 10.1063/1.4885856] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report on measurements of differential cross sections (DCSs) for electron impact excitation of a series of Rydberg electronic-states in α-tetrahydrofurfuryl alcohol (THFA). The energy range of these experiments was 20-50 eV, while the scattered electron was detected in the 10°-90° angular range. There are currently no other experimental data or theoretical computations against which we can directly compare the present measured results. Nonetheless, we are able to compare our THFA DCSs with earlier cross section measurements for Rydberg-state electronic excitation for tetrahydrofuran, a similar cyclic ether, from Do et al. [J. Chem. Phys. 134, 144302 (2011)]. In addition, "rotationally averaged" elastic DCSs, calculated using our independent atom model with screened additivity rule correction approach are also reported. Those latter results give integral cross sections consistent with the optical theorem, and supercede those from the only previous study of Milosavljević et al. [Eur. Phys. J. D 40, 107 (2006)].
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Affiliation(s)
- L Chiari
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
| | - H V Duque
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
| | - D B Jones
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
| | - P A Thorn
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
| | - Z Pettifer
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
| | - G B da Silva
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
| | - P Limão-Vieira
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - D Duflot
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Université Lille, F-59655 Villeneuve d'Ascq Cedex, France
| | - M-J Hubin-Franskin
- Départment de Chimie, Université de Liège, Institut de Chimie-Bât. B6C, B-4000 Liège 1, Belgium
| | - J Delwiche
- Départment de Chimie, Université de Liège, Institut de Chimie-Bât. B6C, B-4000 Liège 1, Belgium
| | - F Blanco
- Departamento de Física Atómica, Molecular y Nuclear, Universidad Complutense de Madrid, Madrid E-28040, Spain
| | - G García
- Instituto de Física Fundamental, CSIC, Madrid E-28006, Spain
| | - M C A Lopes
- Departamento de Física, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - K Ratnavelu
- Institute of Mathematical Sciences, University of Malaya, Kuala Lumpur, Malaysia
| | - R D White
- School of Engineering and Physical Sciences, James Cook University, Townsville, 4810 Queensland, Australia
| | - M J Brunger
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
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20
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Duque H, Chiari L, Jones D, Thorn P, Pettifer Z, da Silva G, Limão-Vieira P, Duflot D, Hubin-Franskin MJ, Delwiche J, Blanco F, García G, Lopes M, Ratnavelu K, White R, Brunger M. Cross sections for electron scattering from α-tetrahydrofurfuryl alcohol. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.05.087] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Dayou F, Duflot D, Rivero-Santamaría A, Monnerville M. A global ab initio potential energy surface for the X2A' ground state of the Si + OH → SiO + H reaction. J Chem Phys 2013; 139:204305. [PMID: 24289352 DOI: 10.1063/1.4832324] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report the first global potential energy surface (PES) for the X(2)A' ground electronic state of the Si((3)P) + OH(X(2)Π) → SiO(X(1)Σg(+)) + H((2)S) reaction. The PES is based on a large number of ab initio energies obtained from multireference configuration interaction calculations plus Davidson correction (MRCI+Q) using basis sets of quadruple zeta quality. Corrections were applied to the ab initio energies in the reactant channel allowing a proper description of long-range interactions between Si((3)P) and OH(X(2)Π). An analytical representation of the global PES has been developed by means of the reproducing kernel Hilbert space method. The reaction is found barrierless. Two minima, corresponding to the SiOH and HSiO isomers, and six saddle points, among which the isomerization transition state, have been characterized on the PES. The vibrational spectra of the SiOH/HSiO radicals have been computed from second-order perturbation theory and quantum dynamics methods. The structural, energetic, and spectroscopic properties of the two isomers are in good agreement with experimental data and previous high quality calculations.
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Affiliation(s)
- Fabrice Dayou
- Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (UMR 8112 du CNRS), Observatoire de Paris-Meudon, Université Pierre et Marie Curie, 92195 Meudon Cedex, France
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22
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Affiliation(s)
- Phillip S Peters
- Laboratoire de Physique des Lasers, Atomes et Molecules (PhLAM), UMR CNRS 8523, Université Lille 1 Sciences et Technologies, Villeneuve d'Ascq F-59655, France
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23
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Limão-Vieira P, Anzai K, Kato H, Hoshino M, Ferreira da Silva F, Duflot D, Mogi D, Tanioka T, Tanaka H. Electronic excitation to singlet states of 1,3-C4F6, c-C4F6 and 2-C4F6 by electron impact--electron energy-loss spectroscopy and ab initio calculations. J Phys Chem A 2012; 116:10529-38. [PMID: 23074974 DOI: 10.1021/jp307599y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report on the first measurements of the electron impact electronic excitation cross sections for C(4)F(6) isomers, hexafluoro-1,3-butadiene (1,3-C(4)F(6)), hexafluorocyclobutene (c-C(4)F(6)), and hexafluoro-2-butyne (2-C(4)F(6)), measured at 100 eV, 3° scattering angle, while sweeping the energy loss over the range 2.0-15.0 eV. Under these experimental conditions, optically allowed transitions are favored. The electronic state spectroscopy has been investigated and the assignments supported by quantum chemical calculations. The n = 3 members of the Rydberg series have been assigned converging to the lowest ionization energy limits of the C(4)F(6) isomers and classified according to the magnitude of the quantum defects (δ).
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Affiliation(s)
- P Limão-Vieira
- Department of Physics, Sophia University, Chiyoda-ku, Tokyo 102-8554, Japan.
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24
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Sério S, Nunes Y, Hoffmann SV, Mason NJ, Duflot D, Limão-Vieira P. Electronic State Spectroscopy of 1,4-Pentadiene As Studied by VUV Photoabsorption Spectroscopy and ab Initio Calculations. J Phys Chem A 2012; 116:8176-84. [DOI: 10.1021/jp305905j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- S. Sério
- Laboratório
de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Y. Nunes
- Laboratório
de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - S. V. Hoffmann
- Institute for Storage Ring Facilities, Aarhus University, Ny Munkegade, DK-8000, Århus C, Denmark
| | - N. J. Mason
- Centre of Earth, Planetary, Space and Astronomy
Research, Department of Physics and Astronomy, The Open University, Walton Hall, Milton
Keynes MK7 6AA, U.K
| | - D. Duflot
- Laboratoire
de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS
8523, Université Lille 1, F-59655
Villeneuve d’Ascq Cedex, France
| | - P. Limão-Vieira
- Laboratório
de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
- Centre of Earth, Planetary, Space and Astronomy
Research, Department of Physics and Astronomy, The Open University, Walton Hall, Milton
Keynes MK7 6AA, U.K
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25
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Duflot D, Flament JP. The vibrational structure of the oxygen K-shell spectra in acenaphthenequinones: An ab initiostudy. J Chem Phys 2012; 137:014314. [DOI: 10.1063/1.4731697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Śmiałek MA, Hubin-Franskin MJ, Delwiche J, Duflot D, Mason NJ, Vrønning-Hoffmann S, de Souza GGB, Ferreira Rodrigues AM, Rodrigues FN, Limão-Vieira P. Limonene: electronic state spectroscopy by high-resolution vacuum ultraviolet photoabsorption, electron scattering, He(I) photoelectron spectroscopy and ab initio calculations. Phys Chem Chem Phys 2012; 14:2056-64. [PMID: 22231475 DOI: 10.1039/c2cp22847e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electronic state spectroscopy of limonene has been investigated using vacuum ultraviolet photoabsorption spectroscopy in the energy range 5.0-10.8 eV. The availability of a high resolution photon beam (~0.075 nm) enabled detailed analysis of the vibrational progressions and allowed us to propose, for the first time, new assignments for several Rydberg series. Excited states located in the 7.5-8.4 eV region have been studied for the first time. A He(I) photoelectron spectrum has also been recorded from 8.2 to 9.5 eV and compared to previous low resolution works. A new value of 8.521 ± 0.002 eV for the ground ionic state adiabatic ionisation energy is proposed. Absolute photoabsorption cross sections were derived in the 10-26 eV range from electron scattering data. All spectra presented in this paper represent the highest resolution data yet reported for limonene. These experiments are complemented by new ab initio calculations performed for the three most abundant conformational isomers of limonene, which we then used in the assignment of the spectral bands.
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Affiliation(s)
- M A Śmiałek
- Atomic Physics Division, Department of Atomic Physics and Luminescence, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gdańsk, Poland.
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27
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Peters PS, Duflot D, Faure A, Kahane C, Ceccarelli C, Wiesenfeld L, Toubin C. Theoretical Investigation of the Isomerization of trans-HCOH to H2CO: An Example of a Water-Catalyzed Reaction. J Phys Chem A 2011; 115:8983-9. [DOI: 10.1021/jp202052h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Phillip S. Peters
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université Lille 1, Villeneuve d’Ascq Cedex 59655, France
- Université Joseph Fourier-Grenoble 1/CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041, France
| | - Denis Duflot
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université Lille 1, Villeneuve d’Ascq Cedex 59655, France
| | - Alexandre Faure
- Université Joseph Fourier-Grenoble 1/CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041, France
| | - Claudine Kahane
- Université Joseph Fourier-Grenoble 1/CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041, France
| | - Cecilia Ceccarelli
- Université Joseph Fourier-Grenoble 1/CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041, France
| | - Laurent Wiesenfeld
- Université Joseph Fourier-Grenoble 1/CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041, France
| | - Céline Toubin
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université Lille 1, Villeneuve d’Ascq Cedex 59655, France
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Kato H, Nunes Y, Duflot D, Limão-Vieira P, Tanaka H. Electronic States of F2CO as Studied by Electron Energy-Loss Spectroscopy and ab Initio Calculations. J Phys Chem A 2011; 115:2708-18. [DOI: 10.1021/jp111063y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Kato
- Department of Material and Life Sciences, Sophia University, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Y. Nunes
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, FCT-Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - D. Duflot
- Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR CNRS 8523, Université Lille 1, F-59655 Villeneuve d'Ascq Cedex, France
| | - P. Limão-Vieira
- Department of Material and Life Sciences, Sophia University, Chiyoda-ku, Tokyo 102-8554, Japan
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, FCT-Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - H. Tanaka
- Department of Material and Life Sciences, Sophia University, Chiyoda-ku, Tokyo 102-8554, Japan
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Duflot D, Flament JP, Heinesch J, Hubin-Franskin MJ. The K-shell spectra of tetrahydrofuran studied by electron energy loss spectroscopy and abinitio calculations. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.06.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Nunes Y, Martins G, Mason NJ, Duflot D, Hoffmann SV, Delwiche J, Hubin-Franskin MJ, Limão-Vieira P. Electronic state spectroscopy of methyl formate probed by high resolution VUV photoabsorption, He(i) photoelectron spectroscopy and ab initio calculations. Phys Chem Chem Phys 2010; 12:15734-43. [DOI: 10.1039/c0cp00051e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Martins G, Ferreira-Rodrigues AM, Rodrigues FN, de Souza GGB, Mason NJ, Eden S, Duflot D, Flament JP, Hoffmann SV, Delwiche J, Hubin-Franskin MJ, Limão-Vieira P. Valence shell electronic spectroscopy of isoprene studied by theoretical calculations and by electron scattering, photoelectron, and absolute photoabsorption measurements. Phys Chem Chem Phys 2009; 11:11219-31. [PMID: 20024391 DOI: 10.1039/b916620c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The first ab initio calculations (vertical energies and oscillator strengths) are reported for the neutral electronic transitions of isoprene (2-methyl-1,3-butadiene), CH(2)CHC(CH(3))CH(2). The VUV photoabsorption spectroscopy of the molecule is presented in the energy range 4.6 to 10.8 eV (270-125 nm) with the highest resolution yet reported above 6.05 eV, revealing new spectral features. Valence and Rydberg transitions have been assigned in accordance with the theoretical results and the associated vibronic series have been analysed. The absolute photoabsorption cross sections at energies below 6.89 eV have been used to calculate the photolysis lifetime of isoprene in the upper stratosphere (20-50 km). Electron energy loss spectroscopy (EELS) measurements have enabled further photoabsorption cross sections to be derived in the range 9-28 eV. The first ab initio calculations have been carried out to determine excitation energies to the lowest energy ionic states of isoprene. The calculations are compared with the He(i) photoelectron spectrum (8 to 17 eV) and new vibrational structure is observed in the first photoelectron band.
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Affiliation(s)
- G Martins
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
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Woittequand S, Duflot D, Monnerville M, Pouilly B, Toubin C, Briquez S, Meyer HD. Erratum: “Classical and quantum studies of the photodissociation of a HX (X=Cl, F) molecule adsorbed on ice” [J. Chem. Phys. 127, 164717 (2007)]. J Chem Phys 2009. [DOI: 10.1063/1.3183958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Gervais B, Giglio E, Adoui L, Cassimi A, Duflot D, Galassi ME. The H2O2+ potential energy surfaces dissociating into H+/OH+: Theoretical analysis of the isotopic effect. J Chem Phys 2009; 131:024302. [DOI: 10.1063/1.3157164] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Vicente A, Antunes R, Almeida D, Franco IJA, Hoffmann SV, Mason NJ, Eden S, Duflot D, Canneaux S, Delwiche J, Hubin-Franskin MJ, Limão-Vieira P. Photoabsorption measurements and theoretical calculations of the electronic state spectroscopy of propionic, butyric, and valeric acids. Phys Chem Chem Phys 2009; 11:5729-41. [DOI: 10.1039/b823500g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Limão-Vieira P, Duflot D, Giuliani A, Vasekova E, Lourenço JMC, Santos PM, Hoffmann SV, Mason NJ, Delwiche J, Hubin-Franskin MJ. Electronic state spectroscopy of c-C5F8 explored by photoabsorption, electron impact, photoelectron spectroscopies and ab initio calculations. J Phys Chem A 2008; 112:2782-93. [PMID: 18331010 DOI: 10.1021/jp7107939] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electronic transitions and resonance-enhanced vibrational excitations of octafluorocyclopentene (c-C5F8) have been investigated using high-resolution photoabsorption spectroscopy in the energy range 6-11 eV. In addition, the high-resolution electron energy loss spectrum (HREELS) was recorded under the electric dipolar excitation conditions (100 eV incident energy, approximately 0 degrees scattering angle) over the 5-14 eV energy loss range. A He(I) photoelectron spectrum (PES) has also been recorded between 11 and 20 eV, allowing us to derive a more precise value of (11.288 +/- 0.002) eV for the ground neutral state adiabatic ionization energy. All spectra presented in this paper represent the first and highest resolution data yet reported for octafluorocyclopentene. Ab initio calculations have been performed for helping in the assignment of the spectral bands for both neutral excited states and ionic states.
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Affiliation(s)
- P Limão-Vieira
- Laboratório de Colisões Atómicas e Moleculares, Departamento de Física, CEFITEC, Universidade Nova de Lisboa, P-2829-516 Caparica, Portugal.
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Woittequand S, Duflot D, Monnerville M, Pouilly B, Toubin C, Briquez S, Meyer HD. Classical and quantum studies of the photodissociation of a HX (X=Cl,F) molecule adsorbed on ice. J Chem Phys 2007; 127:164717. [DOI: 10.1063/1.2799519] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Duflot D, Flament JP, Giuliani A, Heinesch J, Hubin-Franskin MJ. Ab initio and experimental study of the K-shell spectra of 2,5-dihydrofuran. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2004.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Duflot D, Flament JP, Giuliani A, Heinesch J, Hubin-Franskin MJ. Core shell excitation of furan at the O1s and C1s edges: An experimental and ab initio study. J Chem Phys 2003. [DOI: 10.1063/1.1606441] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Duflot D, Chabert N, Flament JP, Robbe JM, Walker I, Cameron J, Giuliani A, Hubin-Franskin MJ, Delwiche J. Thiazyl chloride: an experimental and theoretical study of the valence shell HeI photoelectron spectrum. Chem Phys 2003. [DOI: 10.1016/s0301-0104(02)00966-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Duflot D, Flament JP, Walker IC, Heinesch J, Hubin-Franskin MJ. Core shell excitation of 2-propenal (acrolein) at the O 1s and C 1s edges: An experimental and ab initio study. J Chem Phys 2003. [DOI: 10.1063/1.1527924] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
The rotational spectrum of the 1-cyano-3-fluoro-but-1-ene has been recorded with a pulsed-nozzle microwave Fourier transform spectrometer over the range 6-20 GHz. The frequencies were fitted to the Hamiltonian of Watson (A-reduction, I(r) representation). The resulting rotational constants are A = 7493.404(1) MHz, B = 1211.9831(2) MHz, and C = 1096.0908(1) MHz. By comparing the experimental rotational constants with those obtained by ab initio calculations, we found without ambiguity that the stable conformation for the molecule is the one with the fluorine atom lying in the C&bond;CCN plane (CF-eclipsed conformer). Copyright 2000 Academic Press.
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Affiliation(s)
- S Kassi
- Laboratoire de Physique des Lasers, Atomes et Molécules, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq Cedex, F-59655, France
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Hannay C, Duflot D, Flament JP, Hubin-Franskin MJ. The core excitation of pyridine and pyridazine: An electron spectroscopy and ab initio study. J Chem Phys 1999. [DOI: 10.1063/1.478458] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Duflot D, Hannay C, Flament JP, Hubin-Franskin MJ. Electronic excitation of gaseous pyrrole and pyrazole by inner-shell electron energy loss spectroscopy. J Chem Phys 1998. [DOI: 10.1063/1.477149] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hubin-Franskin MJ, Aouni H, Duflot D, Motte-Tollet F, Hannay C, Ferreira LF, Tourillon G. Inner-shell excitation of monocyanoethylene, trans-dicyanoethylene, and allylcyanide by electron energy loss spectroscopy. J Chem Phys 1997. [DOI: 10.1063/1.473200] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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