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Derbali E, Ajili Y, Mehnen B, Żuchowski PS, Kędziera D, Al-Mogren MM, Jaidane NE, Hochlaf M. Towards the generation of potential energy surfaces of weakly bound medium-sized molecular systems: the case of benzonitrile-He complex. Phys Chem Chem Phys 2023; 25:30198-30210. [PMID: 37807943 DOI: 10.1039/d3cp02720a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Currently, the explicitly correlated coupled cluster method is used routinely to generate the multi-dimensional potential energy surfaces (mD-PESs) of van der Waals complexes of small molecular systems relevant for atmospheric, astrophysical and industrial applications. Although very accurate, this method is computationally prohibitive for medium and large molecules containing clusters. For instance, the recent detections of complex organic molecules (COMs) in the interstellar medium, such as benzonitrile, revealed the need to establish an accurate enough electronic structure approach to map the mD-PESs of these species interacting with the surrounding gases. As a benchmark, we have treated the case of the polar molecule benzonitrile interacting with helium, where we use post-Hartree-Fock and symmetry-adapted perturbation theory (SAPT) techniques. Accordingly, we show that MP2 and distinguishable-cluster approximation (DCSD) cannot be used for this purpose, whereas accurate enough PESs may be obtained using the corresponding explicitly correlated versions (MP2-F12 or DCSD-F12) with a reduction in computational costs. Alternatively, computations revealed that SAPT(DFT) is as performant as CCSD(T)-F12/aug-cc-pVTZ, making it the method of choice for mapping the mD-PESs of COMs containing clusters. Therefore, we have used this approach to generate the 3D-PES of the benzonitrile-He complex along the intermonomer Jacobi coordinates. As an application, we have incorporated the analytic form of this PES into quantum dynamical computations to determine the cross sections of the rotational (de-)excitation of benzonitrile colliding with helium at a collision energy of 10 cm-1.
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Affiliation(s)
- Eya Derbali
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications LSAMA, Université de Tunis Al Manar, Tunis, Tunisia.
| | - Yosra Ajili
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications LSAMA, Université de Tunis Al Manar, Tunis, Tunisia.
| | - Bilel Mehnen
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, Grudziadz Street 5, 87-100 Toruń, Poland
| | - Piotr S Żuchowski
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, Grudziadz Street 5, 87-100 Toruń, Poland
| | - Dariusz Kędziera
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, ul. Gagarina 7, PL 87-100 Toruń, Poland.
| | - Muneerah Mogren Al-Mogren
- Department of Chemistry, College of Sciences, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Nejm-Edine Jaidane
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications LSAMA, Université de Tunis Al Manar, Tunis, Tunisia.
| | - Majdi Hochlaf
- Université Gustave Eiffel, COSYS/IMSE, 5 Bd Descartes 77454, Champs sur Marne, France.
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2
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Bourgalais J, Mercier X, Al-Mogren MM, Hochlaf M. Accurate Prediction of Adiabatic Ionization Energies for PAHs and Substituted Analogues. J Phys Chem A 2023; 127:8447-8458. [PMID: 37773010 DOI: 10.1021/acs.jpca.3c04088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
The accurate calculation of adiabatic ionization energies (AIEs) for polycyclic aromatic hydrocarbons (PAHs) and their substituted analogues is essential for understanding their electronic properties, reactivity, stability, and environmental/health implications. This study demonstrates that the M06-2X density functional theory method excels in predicting the AIEs of polycyclic aromatic hydrocarbons and related molecules, rivaling the (R)CCSD(T)-F12 method in terms of accuracy. These findings suggest that M06-2X, coupled with an appropriate basis set, represents a reliable and efficient method for studying polycyclic aromatic hydrocarbons and related molecules, aligning well with the experimental techniques. The set of molecules examined in this work encompasses numerous polycyclic aromatic hydrocarbons from m/z 67 up to m/z 1,176, containing heteroatoms that may be found in biofuels or nucleic acid bases, making the results highly relevant for photoionization experiments and mass spectrometry. For coronene-derivative molecular species with the C6n2H6n chemical formula, we give an expression to predict their AIEs (AIE (n) = 4.359 + 4.8743n-0.72057, in eV) upon extending the π-aromatic cloud until reaching graphene. In the long term, the application of this method is anticipated to contribute to a deeper understanding of the relationships between PAHs and graphene, guiding research in materials science and electronic applications and serving as a valuable tool for validating theoretical calculation methods.
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Affiliation(s)
| | | | - Muneerah Mogren Al-Mogren
- Department of Chemistry, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Majdi Hochlaf
- Université Gustave Eiffel, COSYS/IMSE, 77454 Champs sur Marne, France
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3
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Zhao H, Pan Y, Lau KC. Ferrocene/ferrocenium, cobaltocene/cobaltocenium and nickelocene/nickelocenium: from gas phase ionization energy to one-electron reduction potential in solvated medium. Phys Chem Chem Phys 2023. [PMID: 37325896 DOI: 10.1039/d3cp01904g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
We propose a theoretical procedure for accurate determination of reduction potentials for three metallocene couples, Cp2M+/Cp2M, where M = Fe, Co and Ni. This procedure first computes the gas phase ionization energy (IE) using the explicitly correlated CCSD(T)-F12 method and includes the zero-point energy correction, core-valence electronic correlation, and relativistic and spin-orbit coupling effects. By means of Born-Haber thermochemical cycle, the one-electron reduction potential is obtained as the sum of the gas phase IE and the corresponding Gibbs free energies of solvation (ΔGsolv) for both the neutral and cationic species. Among the three solvent models (PCM, SMD and uESE) investigated here, it turns out that only the SMD model (computed at the DFT level) gives the best estimation of the value for "ΔGsolv(cation) - ΔGsolv(neutral)" and thus, combining with the accurate IE values, the theoretical protocol is capable of yielding reliable values (in V) for , and . These predictions compare favorably with the available experimental data (in V): , , and . We show that our theoretical procedure is reliable for accurate reduction potential predictions of Cp2Fe+/Cp2Fe, Cp2Co+/Cp2Co and Cp2Ni+/Cp2Ni redox couples in aqueous and non-aqueous media; the maximum absolute deviation is as small as ≈120 mV, which outperforms those of the existing theoretical methods.
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Affiliation(s)
- Hongyan Zhao
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
| | - Yi Pan
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
| | - Kai-Chung Lau
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
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4
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Hartweg S, Hochlaf M, Garcia GA, Nahon L. Photoionization Dynamics and Proton Transfer within the Adenine-Thymine Nucleobase Pair. J Phys Chem Lett 2023; 14:3698-3705. [PMID: 37040591 DOI: 10.1021/acs.jpclett.3c00564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Studying the stability of hydrogen-bonded nucleobase pairs, at the heart of the genetic code, is of utmost importance for an in-depth understanding of basic mechanisms of life and biomolecular evolution. We present here a VUV single photon ionization dynamic study of the nucleobase pair adenine-thymine (AT), revealing its ionization and dissociative ionization thresholds via double imaging electron/ion coincidence spectroscopy. The experimental data, consisting of cluster mass-resolved threshold photoelectron spectra and photon energy-dependent ion kinetic energy release distributions, allow the unambiguous distinction of the dissociation of AT into protonated adenine AH+ and a dehydrogenated thymine radical T(-H) from dissociative ionization processes of other nucleobase clusters. Comparison to high-level ab initio calculations indicates that our experimental observations can be explained by a single hydrogen-bonded conformer present in our molecular beam and allows the estimation of an upper limit of the barrier of the proton transfer in the ionized AT pair.
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Affiliation(s)
- Sebastian Hartweg
- Synchrotron Soleil, L'Orme des Merisiers, Départementale 128, 91190 St Aubin, France
- University of Freiburg, Institute of Physics, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Majdi Hochlaf
- Université Gustave Eiffel, COSYS/IMSE, 5 Bd Descartes, 77454 Champs sur Marne, France
| | - Gustavo A Garcia
- Synchrotron Soleil, L'Orme des Merisiers, Départementale 128, 91190 St Aubin, France
| | - Laurent Nahon
- Synchrotron Soleil, L'Orme des Merisiers, Départementale 128, 91190 St Aubin, France
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5
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Molina F, Dezalay J, Soorkia S, Broquier M, Hochlaf M, Pino GA, Grégoire G. Cryogenic IR and UV spectroscopy of isomer-selected cytosine radical cation. Phys Chem Chem Phys 2022; 24:25182-25190. [DOI: 10.1039/d2cp03953b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
The UV photodissociation of cryogenic-cooled isomer-selected cytosine–silver complex leads to the production of cytosine radical cation without isomerization.
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Affiliation(s)
- Franco Molina
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, F-91405 Orsay, France
- INFIQC (CONICET-UNC), Ciudad Universitaria, Pabellón Argentina, 5000 Córdoba, Argentina
- Departamento de Fisicoquímica, Fac. de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Pabellón Argentina, X5000HUA Córdoba, Argentina
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria, Pabellón Argentina, X5000HUA Córdoba, Argentina
| | - Jordan Dezalay
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, F-91405 Orsay, France
| | - Satchin Soorkia
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, F-91405 Orsay, France
| | - Michel Broquier
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, F-91405 Orsay, France
| | - Majdi Hochlaf
- Université Gustave Eiffel, COSYS/IMSE, 5 Bd Descartes 77454, Champs sur Marne, France
| | - Gustavo Ariel Pino
- INFIQC (CONICET-UNC), Ciudad Universitaria, Pabellón Argentina, 5000 Córdoba, Argentina
- Departamento de Fisicoquímica, Fac. de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Pabellón Argentina, X5000HUA Córdoba, Argentina
| | - Gilles Grégoire
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, F-91405 Orsay, France
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6
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Laamiri K, Garcia GA, Nahon L, Ben Houria A, Feifel R, Hochlaf M. Threshold photoelectron spectroscopy of 9-methyladenine: theory and experiment. Phys Chem Chem Phys 2021; 24:3523-3531. [PMID: 34676858 DOI: 10.1039/d1cp03729c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We present a combined experimental and theoretical study of single-photon ionization of 9-methyladenine (9MA) in the gas phase. In addition to tautomerism, several rotamers due to the rotation of the methyl group may exist. Computations show, however, that solely one rotamer contributes because of low population in the molecular beam and/or unfavorable Franck-Condon factors upon ionization. Experimentally, we used VUV radiation available at the DESIRS beamline of the synchrotron radiation facility SOLEIL to record the threshold photoelectron spectrum of this molecule between 8 and 11 eV. This spectrum consists of a well-resolved band assigned mainly to vibronic levels of the D0 cationic state, plus a contribution from the D1 state, and two large bands corresponding to the D1, D2 and D3 electronically excited states. The adiabatic ionization energy of 9MA is measured at 8.097 ± 0.005 eV in close agreement with the computed value using the explicitly correlated coupled cluster approach including core valence, scalar relativistic and zero-point vibrational energy corrections. This work sheds light on the complex pattern of the lowest doublet electronic states of 9MA+. The comparison to canonical adenine reveals that methylation induces further electronic structure complication that may be important to understand the effects of ionizing radiation and the charge distribution in these biological entities at different time scales.
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Affiliation(s)
- K Laamiri
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs-sur-Marne, France. .,Laboratoire de Spectroscopie Atomique, Moléculaire et Applications - LSAMA, Université de Tunis El Manar, Tunis, Tunisia
| | - G A Garcia
- Synchrotron SOLEIL, L'orme des Merisiers, Saint-Aubin - BP 48 - 91192 Gif-sur-Yvette Cedex, France
| | - L Nahon
- Synchrotron SOLEIL, L'orme des Merisiers, Saint-Aubin - BP 48 - 91192 Gif-sur-Yvette Cedex, France
| | - A Ben Houria
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications - LSAMA, Université de Tunis El Manar, Tunis, Tunisia
| | - R Feifel
- University of Gothenburg, Department of Physics, 412 58 Gothenburg, Sweden
| | - M Hochlaf
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs-sur-Marne, France.
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7
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Ho J, Cheng P. Ultrafast excited‐state dynamics of gas‐phase 5‐methylcytosine tautomers. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jr‐Wei Ho
- Department of Chemistry National Tsing Hua University Hsinchu Taiwan
| | - Po‐Yuan Cheng
- Department of Chemistry National Tsing Hua University Hsinchu Taiwan
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8
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Hochlaf M, Linguerri R, Cheraki M, Ayari T, Ben Said R, Feifel R, Chambaud G. S 2O 2q+ ( q = 0, 1, and 2) Molecular Systems: Characterization and Atmospheric Planetary Implications. J Phys Chem A 2021; 125:1958-1971. [PMID: 33635674 DOI: 10.1021/acs.jpca.0c11407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We use accurate ab initio methodologies at the coupled cluster level ((R)CCSD(T)) and its explicitly correlated version ((R)CCSD(T)-F12) to investigate the electronic structure, relative stability, and spectroscopy of the stable isomers of the [S2O2] system and of some of its cations and dications, with a special focus on the most relevant isomers that could be involved in terrestrial and planetary atmospheres. This work identifies several stable isomers (10 neutral, 8 cationic, and 5 dicationic), including trigonal-OSSO, cis-OSSO, and cyc-OSSO. For all these isomers, we calculated geometric parameters, fragmentation energies, and simple and double ionization energies of the neutral species. Several structures are identified for the first time, especially for the ionic species. Computations show that in addition to cis-OSSO and trans-OSSO proposed for the absorption in the near-UV spectrum of the Venusian atmosphere other S2O2, S2O2+, and S2O22+ species may contribute. Moreover, the characterization of the stability of singly and doubly charged S2O2 entities can also be used for their identification by mass spectrometry and UV spectroscopy in the laboratory or in planetary atmospheres. In sum, the quest for the main UV absorber in Venus' atmosphere is not over, since the physical chemistry of sulfur oxides in Venus' atmosphere is far from being understood.
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Affiliation(s)
- Majdi Hochlaf
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France
| | - Roberto Linguerri
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France
| | - Mohamed Cheraki
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France
| | - Tarek Ayari
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France
| | - Ridha Ben Said
- Department of Chemistry, College of Science and Arts, Qassim University, Ar Rass 58863, Saudi Arabia
| | - Raimund Feifel
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 58 Gothenburg, Sweden
| | - Gilberte Chambaud
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France
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9
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Mestdagh JM, Poisson L. Excited State Dynamics of Isolated 6- and 8-Hydroxyquinoline Molecules. Chemphyschem 2020; 21:2605-2613. [PMID: 33022865 DOI: 10.1002/cphc.202000626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/05/2020] [Indexed: 11/09/2022]
Abstract
The photoinduced dynamics of isolated n-hydroxyquinoline (nHQ) molecules (n=6,8) was investigated in femtosecond pump-probe experiments. A qualitative difference was found between 8HQ and 6HQ. After an initial rapid decay corresponding to the departure of the initial wavepacket out of the Franck-Condon region of the excitation, the 8HQ probe signal decays to zero in 0.37 ps whereas a much longer time constant of 10.4 ps is observed in 6HQ. This interrogates on the role played by the intramolecular H-bond N · · · HO which is at play the 8HQ molecule. Ab-initio were performed at the MCSCF/aug-cc-pVDZ level on the 8HQ molecule to help the discussion. A complex energy landscape was found, which includes a conical intersection.
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Affiliation(s)
- Jean-Michel Mestdagh
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191, Gif-sur-Yvette, France
| | - Lionel Poisson
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191, Gif-sur-Yvette, France
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10
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Derbali I, Hrodmarsson HR, Schwell M, Bénilan Y, Poisson L, Hochlaf M, Alikhani ME, Guillemin JC, Zins EL. Unimolecular decomposition of methyl ketene and its dimer in the gas phase: theory and experiment. Phys Chem Chem Phys 2020; 22:20394-20408. [PMID: 32914152 DOI: 10.1039/d0cp03921g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a combined theoretical and experimental investigation on the single photoionization and dissociative photoionization of gas-phase methyl ketene (MKE) and its neutral dimer (MKE2). The performed experiments entail the recording of photoelectron photoion coincidence (PEPICO) spectra and slow photoelectron spectra (SPES) in the energy regime 8.7-15.5 eV using linearly polarized synchrotron radiation. We observe both dimerization and trimerization of the monomer which brings about significantly complex and abstruse dissociative ionization patterns. These require the implementation of theoretical calculations to explore the potential energy surfaces of the monomer and dimer's neutral and ionized geometries. To this end, explicitly correlated quantum chemical methodologies involving the coupled cluster with single, double and perturbative triple excitations (R)CCSD(T)-F12 method, are utilized. An improvement in the adiabatic ionization energy of MKE is presented (AIE = 8.937 ± 0.020 eV) as well as appearance energies for multiple fragments formed through dissociative ionization of either the MKE monomer or dimer. In this regard, the synergy of experiment and theory is crucial to interpreting the obtained results. We discuss the potential astrochemical implications of this work in the context of recent advances in the field of astrochemistry and speculate on the potential presence and eventual fate of interstellar MKE molecules.
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Affiliation(s)
- Imene Derbali
- MONARIS UMR 8233 CNRS, Sorbonne Université, 4 Place Jussieu, 75252 Paris Cedex 5, France
| | - Helgi Rafn Hrodmarsson
- Synchrotron SOLEIL, L'Orme des Merisiers, St Aubin, BP 48, Gif sur Yvette, France and Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, The Netherlands.
| | - Martin Schwell
- LISA UMR 7583 Université Paris-Est Créteil and Université de Paris, Institut Pierre et Simon Laplace, 61 Avenue du Général de Gaulle, 94010 Créteil, France
| | - Yves Bénilan
- LISA UMR 7583 Université Paris-Est Créteil and Université de Paris, Institut Pierre et Simon Laplace, 61 Avenue du Général de Gaulle, 94010 Créteil, France
| | - Lionel Poisson
- Université Paris-Saclay, CEA, CNRS, LIDYL, 91191 Gif-sur-Yvette, France
| | - Majdi Hochlaf
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France.
| | | | - Jean-Claude Guillemin
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
| | - Emilie-Laure Zins
- MONARIS UMR 8233 CNRS, Sorbonne Université, 4 Place Jussieu, 75252 Paris Cedex 5, France
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11
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Bourgalais J, Gouid Z, Herbinet O, Garcia GA, Arnoux P, Wang Z, Tran LS, Vanhove G, Hochlaf M, Nahon L, Battin-Leclerc F. Isomer-sensitive characterization of low temperature oxidation reaction products by coupling a jet-stirred reactor to an electron/ion coincidence spectrometer: case of n-pentane. Phys Chem Chem Phys 2020; 22:1222-1241. [DOI: 10.1039/c9cp04992d] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using a tunable vacuum ultraviolet synchrotron beam line and first principle computations, a jet-stirred reactor was coupled for the first time to a photoionization mass spectrometer using electron/ion coincidence imaging.
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Affiliation(s)
- Jérémy Bourgalais
- LATMOS/IPSL
- UVSQ Université Paris-Saclay
- Sorbonne Université
- CNRS
- Guyancourt
| | - Zied Gouid
- Université Gustave Eiffel
- COSYS/LISIS
- Champs sur Marne
- France
| | - Olivier Herbinet
- CNRS
- Université de Lorraine
- Laboratoire Réactions et Génie des Procédés
- UPR 3349
- Nancy F-54000
| | - Gustavo A. Garcia
- Synchrotron SOLEIL
- L’Orme des Merisiers
- 91192 Gif-sur-Yvette Cedex
- France
| | | | - Zhandong Wang
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Luc-Sy Tran
- Physicochimie des Processus de Combustion et de l’Atmosphère (PC2A)
- UMR 8522 CNRS
- Université de Lille
- F-59000 Lille
- France
| | - Guillaume Vanhove
- Physicochimie des Processus de Combustion et de l’Atmosphère (PC2A)
- UMR 8522 CNRS
- Université de Lille
- F-59000 Lille
- France
| | - Majdi Hochlaf
- Université Gustave Eiffel
- COSYS/LISIS
- Champs sur Marne
- France
| | - Laurent Nahon
- Synchrotron SOLEIL
- L’Orme des Merisiers
- 91192 Gif-sur-Yvette Cedex
- France
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12
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Hochlaf M. In-silico astrochemistry of life's building blocks: Comment on "A never-ending story in the sky: The secrets of chemical evolution" by Cristina Puzzarini and Vincenzo Barone. Phys Life Rev 2019; 32:101-103. [PMID: 31422011 DOI: 10.1016/j.plrev.2019.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 08/09/2019] [Indexed: 10/26/2022]
Affiliation(s)
- Majdi Hochlaf
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 Boulevard Descartes, 77454 Marne-la-Vallée, France.
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13
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Gouid Z, Röder A, Cunha de Miranda BK, Gaveau MA, Briant M, Soep B, Mestdagh JM, Hochlaf M, Poisson L. Energetics and ionization dynamics of two diarylketone molecules: benzophenone and fluorenone. Phys Chem Chem Phys 2019; 21:14453-14464. [PMID: 31210192 DOI: 10.1039/c9cp02385b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single photon ionization and subsequent unimolecular ion decomposition were studied on jet-cooled benzophenone and fluorenone separately, using VUV synchrotron radiation in a photoion/photoelectron coincidence setup. Slow PhotoElectron Spectra (SPES) were recorded in coincidence with either the parent or the fragment ions for hν < 12.5 eV. Dissociative ionization is observed for benzophenone only. The full interpretation of the measurements, including the identification of the neutral and ionic species when dissociative ionization is at play, benefits from high level ab initio computations for determining the equilibrium structures and the energetics of the neutral and ionized molecules and of their fragments. Electronically excited states of the parent molecular ions were calculated also. From this analysis, an accurate experimental determination of the energetics of the benzophenone and fluorenone ions and of their fragmentation channels is available: adiabatic ionization energies of benzophenone at 8.923 ± 0.005 eV and of fluorenone at 8.356 ± 0.007 eV; and appearance energies of benzophenone fragment ions at 11.04 ± 0.02 eV (loss of C6H5), 11.28 ± 0.02 eV (loss of H) and 11.45 ± 0.02 eV (loss of CO). The corresponding fragmentation mechanisms are explored, showing likely concerted bonds rearrangement. Possible pre-ionizing fragmentation is discussed in light of the spectra presented. The structural rigidity of fluorenone diarylketone seems to be the origin of the inhibition of the fragmentation of its cation.
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Affiliation(s)
- Zied Gouid
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, 77454 Marne-la-Vallée, France.
| | - Anja Röder
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France. and Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | | | - Marc-André Gaveau
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France.
| | - Marc Briant
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France.
| | - Benoît Soep
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France.
| | - Jean-Michel Mestdagh
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France.
| | - Majdi Hochlaf
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, 77454 Marne-la-Vallée, France.
| | - Lionel Poisson
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France.
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14
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Derbali I, Hrodmarsson HR, Gouid Z, Schwell M, Gazeau MC, Guillemin JC, Hochlaf M, Alikhani ME, Zins EL. Photoionization and dissociative photoionization of propynal in the gas phase: theory and experiment. Phys Chem Chem Phys 2019; 21:14053-14062. [PMID: 30652173 DOI: 10.1039/c8cp06751a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Propynal (HCCCHO) is a complex organic compound (COM) of astrochemical and astrobiological interest. We present a combined theoretical and experimental investigation on the single photon ionization of gas-phase propynal, in the 10 to 15.75 eV energy range. Fragmentation pathways of the resulting cation were investigated both theoretically and experimentally. The adiabatic ionization energy (AIE) has been measured to be AIEexp = 10.715 ± 0.005 eV using tunable VUV synchrotron radiation coupled with a double imaging photoelectron photoion coincidence (i2PEPICO) spectrometer. In the energy range under study, three fragments formed by dissociative photoionization were identified experimentally: HC3O+, HCO+ and C2H2+, and their respective appearance energies (AE) were found to be AE = 11.26 ± 0.03, 13.4 ± 0.3 and 11.15 ± 0.03 eV, respectively. Using explicitly correlated coupled cluster calculations and after inclusion of the zero point vibrational energy, core-valence and scalar relativistic effects, the AIE is calculated to be AIEcalc = 10.717 eV, in excellent agreement with the experimental finding. The appearance energies of the fragments were calculated using a similar methodological approach. To further interpret the observed vibrational structure, anharmonic frequencies were calculated for the fundamental electronic state of the propynal cation. Moreover, MRCI calculations were carried out to understand the population of excited states of the cationic species. This combined experimental and theoretical study will help to understand the presence and chemical evolution of propynal in the external parts of interstellar clouds where it has been observed.
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Affiliation(s)
- Imene Derbali
- MONARIS UMR 8233 CNRS, Sorbonne Université, 4 place Jussieu, 75252 Paris Cedex 5, France.
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15
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Zhu G, Qian C, Wang L. Tautomer‐Specific Resonant Photoelectron Imaging of Deprotonated Cytosine Anions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guo‐Zhu Zhu
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Chen‐Hui Qian
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Lai‐Sheng Wang
- Department of Chemistry Brown University Providence RI 02912 USA
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16
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Zhu G, Qian C, Wang L. Tautomer‐Specific Resonant Photoelectron Imaging of Deprotonated Cytosine Anions. Angew Chem Int Ed Engl 2019; 58:7856-7860. [DOI: 10.1002/anie.201903444] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Guo‐Zhu Zhu
- Department of ChemistryBrown University Providence RI 02912 USA
| | - Chen‐Hui Qian
- Department of ChemistryBrown University Providence RI 02912 USA
| | - Lai‐Sheng Wang
- Department of ChemistryBrown University Providence RI 02912 USA
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17
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Pitzer M, Ozga C, Küstner-Wetekam C, Reiß P, Knie A, Ehresmann A, Jahnke T, Giuliani A, Nahon L. State-Dependent Fragmentation of Protonated Uracil and Uridine. J Phys Chem A 2019; 123:3551-3557. [PMID: 30943036 DOI: 10.1021/acs.jpca.9b01822] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Action spectroscopy using photon excitation in the VUV range (photon energy 4.5-9 eV) was performed on protonated uracil (UraH+) and uridine (UrdH+). The precursor ions with m/ z 113 and m/ z 245, respectively, were produced by an electrospray ionization source and accumulated inside a quadrupole ion trap mass spectrometer. After irradiation with tunable synchrotron radiation, product ion mass spectra were obtained. Fragment yields as a function of excitation energy show several maxima that can be attributed to the photoexcitation into different electronic states. For uracil, vertically excited states were calculated using the equation-of-motion coupled cluster approach and compared to the observed maxima. This allows to establish correlations between electronic states and the resulting fragment masses and can thus help to disentangle the complex de-excitation and fragmentation pathways of nucleic acid building blocks. Photofragmentation of the nucleoside uridine shows a significantly lower variety of fragments, indicating stabilization of the nucleobase by the attached sugar.
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Affiliation(s)
- Martin Pitzer
- Department of Chemical and Biological Physics , Weizmann Institute of Science , Rehovot 7610001 , Israel.,Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) , University of Kassel , 34132 Kassel , Germany
| | - Christian Ozga
- Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) , University of Kassel , 34132 Kassel , Germany
| | - Catmarna Küstner-Wetekam
- Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) , University of Kassel , 34132 Kassel , Germany
| | - Philipp Reiß
- Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) , University of Kassel , 34132 Kassel , Germany
| | - André Knie
- Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) , University of Kassel , 34132 Kassel , Germany
| | - Arno Ehresmann
- Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) , University of Kassel , 34132 Kassel , Germany
| | - Till Jahnke
- Institute for Nuclear Physics , Goethe-University , 60438 Frankfurt , Germany
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18
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Zhang Y, Xie P, Yang S, Han K. Ionization and Electron Attachment for Nucleobases in Water. J Phys Chem B 2019; 123:1237-1247. [DOI: 10.1021/acs.jpcb.8b09435] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yan Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Zhongshan Road 457, Dalian 116023, China
- Institute of Molecular Sciences and Engineering, Shandong University, Qingdao, Binhai Road 72, Qingdao 266237, China
| | - Peng Xie
- School of Chemistry & Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Songqiu Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Zhongshan Road 457, Dalian 116023, China
| | - Keli Han
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Zhongshan Road 457, Dalian 116023, China
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19
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Bellili A, Gouid Z, Gazeau MC, Bénilan Y, Fray N, Guillemin JC, Hochlaf M, Schwell M. Single photon ionization of methyl isocyanide and the subsequent unimolecular decomposition of its cation: experiment and theory. Phys Chem Chem Phys 2019; 21:26017-26026. [DOI: 10.1039/c9cp04310a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Methyl isocyanide, CH3NC, is a key compound in astrochemistry and astrobiology.
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Affiliation(s)
- A. Bellili
- Université Paris-Est
- Laboratoire Modélisation et Simulation Multi Echelle
- MSME UMR 8208 CNRS
- 77454 Marne-la-Vallée
- France
| | - Z. Gouid
- Université Paris-Est
- Laboratoire Modélisation et Simulation Multi Echelle
- MSME UMR 8208 CNRS
- 77454 Marne-la-Vallée
- France
| | - M. C. Gazeau
- Laboratoire Interuniversitaire des Systèmes Atmosphériques
- LISA
- UMR CNRS 7583
- Université Paris-Est-Créteil
- Université de Paris
| | - Y. Bénilan
- Laboratoire Interuniversitaire des Systèmes Atmosphériques
- LISA
- UMR CNRS 7583
- Université Paris-Est-Créteil
- Université de Paris
| | - N. Fray
- Laboratoire Interuniversitaire des Systèmes Atmosphériques
- LISA
- UMR CNRS 7583
- Université Paris-Est-Créteil
- Université de Paris
| | - J. C. Guillemin
- Univ Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS
- ISCR UMR6226
- F-35000 Rennes
| | - M. Hochlaf
- Université Paris-Est
- Laboratoire Modélisation et Simulation Multi Echelle
- MSME UMR 8208 CNRS
- 77454 Marne-la-Vallée
- France
| | - M. Schwell
- Laboratoire Interuniversitaire des Systèmes Atmosphériques
- LISA
- UMR CNRS 7583
- Université Paris-Est-Créteil
- Université de Paris
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20
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Othmani H, Ben Said R, Terzi N, Jaidane NE, Mogren Al Mogren M, Elmarghany A, Hochlaf M. Structural, energetic and spectroscopic characterisation of 5-fluorouracil anticarcinogenic drug isomers, tautomers and ions. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1548715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- H. Othmani
- Laboratoire de Modélisation et Simulation Multi Echelle, Université Paris-Est, MSME UMR 8208 CNRS, Champs-sur-Marne, France
- Faculté des Sciences de Tunis, Laboratoire de Spectroscopie Atomique, Moléculaire et Applications-LSAMA, Université de Tunis El-Manar, Tunis, Tunisia
| | - R. Ben Said
- Department of Chemistry, College of Science & Arts at Al-Rass, Qassim University, Al-Rass, Kingdom of Saudi Arabia
- Unité de recherche Physico-Chimie des Matériaux à l’Etat Condensé, Département de Chimie, Faculté des Sciences de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - N. Terzi
- Faculté des Sciences de Tunis, Laboratoire de Spectroscopie Atomique, Moléculaire et Applications-LSAMA, Université de Tunis El-Manar, Tunis, Tunisia
| | - N.-E. Jaidane
- Faculté des Sciences de Tunis, Laboratoire de Spectroscopie Atomique, Moléculaire et Applications-LSAMA, Université de Tunis El-Manar, Tunis, Tunisia
| | - M. Mogren Al Mogren
- Chemistry Department, Faculty of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - A. Elmarghany
- Chemistry Department, Faculty of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
- Faculty of Science, Suez University, Suez, Egypt
| | - M. Hochlaf
- Laboratoire de Modélisation et Simulation Multi Echelle, Université Paris-Est, MSME UMR 8208 CNRS, Champs-sur-Marne, France
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21
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Zhao HY, Lau KC, Garcia GA, Nahon L, Carniato S, Poisson L, Schwell M, Al-Mogren MM, Hochlaf M. Unveiling the complex vibronic structure of the canonical adenine cation. Phys Chem Chem Phys 2018; 20:20756-20765. [PMID: 29989120 DOI: 10.1039/c8cp02930j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adenine, a DNA base, exists as several tautomers and isomers that are closely lying in energy and that may form a mixture upon vaporization of solid adenine. Indeed, it is challenging to bring adenine into the gas phase, especially as a unique tautomer. The experimental conditions were tuned to prepare a jet-cooled canonical adenine (9H-adenine). This isolated DNA base was ionized by single VUV photons from a synchrotron beamline and the corresponding slow photoelectron spectrum was compared to ab initio computations of the neutral and ionic species. We report the vibronic structure of the X+ 2A'' (D0), A+ 2A' (D1) and B+ 2A'' (D2) electronic states of the 9H adenine cation, from the adiabatic ionization energy (AIE) up to AIE + 1.8 eV. Accurate AIEs are derived for the 9H-adenine (X[combining tilde] 1A') + hν → 9H-adenine+ (X+ 2A'', A+ 2A', B+ 2A'') + e- transitions. Close to the AIE, we fully assign the rich vibronic structure solely to the 9H-adenine (X 1A') + hν → 9H-adenine+ (X+ 2A'') transition. Importantly, we show that the lowest cationic electronic states of canonical adenine are coupled vibronically. The present findings are important for understanding the effects of ionizing radiation and the charge distribution on this elementary building block of life, at ultrafast, short, and long timescales.
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Affiliation(s)
- Hong Yan Zhao
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong
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22
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Lesslie M, Lawler JT, Dang A, Korn JA, Bím D, Steinmetz V, Maître P, Tureček F, Ryzhov V. Cytosine Radical Cations: A Gas‐Phase Study Combining IRMPD Spectroscopy, UVPD Spectroscopy, Ion–Molecule Reactions, and Theoretical Calculations. Chemphyschem 2017; 18:1293-1301. [DOI: 10.1002/cphc.201700281] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Michael Lesslie
- Department of Chemistry and Biochemistry Northern Illinois University DeKalb IL 60115 USA
| | - John T. Lawler
- Department of Chemistry and Biochemistry Northern Illinois University DeKalb IL 60115 USA
| | - Andy Dang
- Department of Chemistry University of Washington Bagley Hall, Box 351700 Seattle Washington 98195 USA
| | - Joseph A. Korn
- Department of Chemistry University of Washington Bagley Hall, Box 351700 Seattle Washington 98195 USA
| | - Daniel Bím
- Institute of Organic Chemistry and Biochemistry Academy of Sciences of the Czech Republic 166 10 Prague 6 Czech Republic
| | - Vincent Steinmetz
- Laboratoire de Chimie Physique Université Paris-Sud UMR8000 CNRS 91405 Orsay France
| | - Philippe Maître
- Laboratoire de Chimie Physique Université Paris-Sud UMR8000 CNRS 91405 Orsay France
| | - Frantisek Tureček
- Department of Chemistry University of Washington Bagley Hall, Box 351700 Seattle Washington 98195 USA
| | - Victor Ryzhov
- Department of Chemistry and Biochemistry Northern Illinois University DeKalb IL 60115 USA
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23
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Hochlaf M. Advances in spectroscopy and dynamics of small and medium sized molecules and clusters. Phys Chem Chem Phys 2017; 19:21236-21261. [DOI: 10.1039/c7cp01980g] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Investigations of the spectroscopy and dynamics of small- and medium-sized molecules and clusters represent a hot topic in atmospheric chemistry, biology, physics, atto- and femto-chemistry and astrophysics.
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Affiliation(s)
- Majdi Hochlaf
- Université Paris-Est
- Laboratoire Modélisation et Simulation Multi Echelle
- MSME UMR 8208 CNRS
- 77454 Marne-la-Vallée
- France
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