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Bolognesi P, Avaldi L. Photoelectron-photoion(s) coincidence studies of molecules of biological interest. Phys Chem Chem Phys 2022; 24:22356-22370. [PMID: 36124990 DOI: 10.1039/d2cp03079a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectron-photoion(s) coincidence, PEPICO, experiments with synchrotron radiation have become one of the most powerful tools to investigate dissociative photoionization thanks to their selectivity. In this paper their application to the study of molecular species of biological interest in the gas phase is reviewed. Some applications of PEPICO to the study of potential radiosensitizers, amino acids and small peptides and opportunities offered by the advent of novel methods for the production of beams of these molecules are discussed.
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Affiliation(s)
- P Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 00015 Monterotondo Scalo, Italy.
| | - L Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, CP 10 00015 Monterotondo Scalo, Italy.
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2
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Barreiro-Lage D, Nicolafrancesco C, Kočišek J, Luna A, Kopyra J, Alcamí M, Huber BA, Martín F, Domaracka A, Rousseau P, Díaz-Tendero S. Controlling the diversity of ion-induced fragmentation pathways by N-methylation of amino acids. Phys Chem Chem Phys 2022; 24:941-954. [PMID: 34913940 DOI: 10.1039/d1cp04097a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We present a combined experimental and theoretical study of the fragmentation of singly and doubly N-methylated glycine (sarcosine and N,N-dimethyl glycine, respectively) induced by low-energy (keV) O6+ ions. Multicoincidence mass spectrometry techniques and quantum chemistry simulations (ab initio molecular dynamics and density functional theory) allow us to characterise different fragmentation pathways as well as the associated mechanisms. We focus on the fragmentation of doubly ionised species, for which coincidence measurements provide unambiguous information on the origin of the various charged fragments. We have found that single N-methylation leads to a larger variety of fragmentation channels than in no methylation of glycine, while double N-methylation effectively closes many of these fragmentation channels, including some of those appearing in pristine glycine. Importantly, the closure of fragmentation channels in the latter case does not imply a protective effect by the methyl group.
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Affiliation(s)
- Darío Barreiro-Lage
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain.
| | - Chiara Nicolafrancesco
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France. .,Synchrotron SOLEIL, LOrme des Merisiers, St Aubin, BP 48, Gif sur Yvette Cedex 91192, France
| | - Jaroslav Kočišek
- J. Heyrovsky Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejskova 3, Prague 18223, Czech Republic
| | - Alberto Luna
- Centro de Computación Científica, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Janina Kopyra
- Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, Siedlce 08-110, Poland
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Bernd A Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
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3
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Aguirre NF, Díaz-Tendero S, Hervieux PA, Alcamí M, Chabot M, Béroff K, Martín F. Charge and energy sharing in the fragmentation of astrophysically relevant carbon clusters. Theor Chem Acc 2021. [DOI: 10.1007/s00214-020-02702-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Stockett MH, Björkhage M, Cederquist H, Schmidt HT, Zettergren H. Storage time dependent photodissociation action spectroscopy of polycyclic aromatic hydrocarbon cations in the cryogenic electrostatic storage ring DESIREE. Faraday Discuss 2019; 217:126-137. [DOI: 10.1039/c8fd00161h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intrinsic absorption profile and radiative cooling rate of coronene cations are reported.
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5
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Domaracka A, Delaunay R, Mika A, Gatchell M, Zettergren H, Cederquist H, Rousseau P, Huber BA. Ion collision-induced chemistry in pure and mixed loosely bound clusters of coronene and C 60 molecules. Phys Chem Chem Phys 2018; 20:15052-15060. [PMID: 29790511 DOI: 10.1039/c8cp01179f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Ionization, fragmentation and molecular growth have been studied in collisions of 22.5 keV He2+- or 3 keV Ar+-projectiles with pure loosely bound clusters of coronene (C24H12) molecules or with loosely bound mixed C60-C24H12 clusters by using mass spectrometry. The heavier and slower Ar+ projectiles induce prompt knockout-fragmentation - C- and/or H-losses - from individual molecules and highly efficient secondary molecular growth reactions before the clusters disintegrate on picosecond timescales. The lighter and faster He2+ projectiles have a higher charge and the main reactions are then ionization by ions that are not penetrating the clusters. This leads mostly to cluster fragmentation without molecular growth. However, here penetrating collisions may also lead to molecular growth but to a much smaller extent than with 3 keV Ar+. Here we present fragmentation and molecular growth mass distributions with 1 mass unit resolution, which reveals that the same numbers of C- and H-atoms often participate in the formation and breaking of covalent bonds inside the clusters. We find that masses close to those with integer numbers of intact coronene molecules, or with integer numbers of both intact coronene and C60 molecules, are formed where often one or several H-atoms are missing or have been added on. We also find that super-hydrogenated coronene is formed inside the clusters.
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Affiliation(s)
- Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France.
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6
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Qian DB, Shi FD, Chen L, Martin S, Bernard J, Yang J, Zhang SF, Chen ZQ, Zhu XL, Ma X. Time-resolved photoion imaging spectroscopy: Determining energy distribution in multiphoton absorption experiments. J Chem Phys 2018; 148:134303. [PMID: 29626894 DOI: 10.1063/1.5017000] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We propose an approach to determine the excitation energy distribution due to multiphoton absorption in the case of excited systems following decays to produce different ion species. This approach is based on the measurement of the time-resolved photoion position spectrum by using velocity map imaging spectrometry and an unfocused laser beam with a low fluence and homogeneous profile. Such a measurement allows us to identify the species and the origin of each ion detected and to depict the energy distribution using a pure Poisson's equation involving only one variable which is proportional to the absolute photon absorption cross section. A cascade decay model is used to build direct connections between the energy distribution and the probability to detect each ionic species. Comparison between experiments and simulations permits the energy distribution and accordingly the absolute photon absorption cross section to be determined. This approach is illustrated using C60 as an example. It may therefore be extended to a wide variety of molecules and clusters having decay mechanisms similar to those of fullerene molecules.
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Affiliation(s)
- D B Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - F D Shi
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - L Chen
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - S Martin
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - J Bernard
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - J Yang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - S F Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Z Q Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X L Zhu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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7
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Li B, Allouche AR, Bernard J, Brédy R, Qian DB, Ma X, Martin S, Chen L. Fragmentation dynamics of meso-tetraphenyl iron (III) porphyrin chloride dication under energy control. J Chem Phys 2017; 146:124302. [PMID: 28388138 DOI: 10.1063/1.4978626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Meso-tetraphenyl iron (III) porphyrin chloride dications (FeTPPCl2+)* were prepared in collisions with F+ and H+ at 3 keV. The dominant fragmentation channels were observed to involve the loss of the Cl atom and the successive loss of neutral phenyl groups for both collisional systems. The mass spectra in correlation with the deposited excitation energy distributions of the parent ions for the main fragmentation channels were measured by using the collision induced dissociation under energy control method. The global excitation energy distribution was found to be shifted to lower energies in collisions with H+ compared to collisions with F+ showing a noteworthy change of the excitation energy window using different projectile ions. Partial excitation energy distributions of the parent ions FeTPPCl2+ were obtained for each fragmentation group. In a theoretical work, we have calculated the dissociation energies for the loss of one and two phenyl groups, including phenyl and (phenyl ± H). The energy barrier for the hydrogen atom transfer during the loss of (phenyl-H) has been also calculated. The measured energy difference for the successive loss of two phenyl groups was compared with the theoretical values.
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Affiliation(s)
- B Li
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France
| | - A R Allouche
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France
| | - J Bernard
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France
| | - R Brédy
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France
| | - D B Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - S Martin
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France
| | - L Chen
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France
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8
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Aguirre NF, Díaz-Tendero S, Hervieux PA, Alcamí M, Martín F. M 3C: A Computational Approach To Describe Statistical Fragmentation of Excited Molecules and Clusters. J Chem Theory Comput 2017; 13:992-1009. [PMID: 28005371 DOI: 10.1021/acs.jctc.6b00984] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Microcanonical Metropolis Monte Carlo method, based on a random sampling of the density of states, is revisited for the study of molecular fragmentation in the gas phase (isolated molecules, atomic and molecular clusters, complex biomolecules, etc.). A random walk or uniform random sampling in the configurational space (atomic positions) and a uniform random sampling of the relative orientation, vibrational energy, and chemical composition of the fragments is used to estimate the density of states of the system, which is continuously updated as the random sampling populates individual states. The validity and usefulness of the method is demonstrated by applying it to evaluate the caloric curve of a weakly bound rare gas cluster (Ar13), to interpret the fragmentation of highly excited small neutral and singly positively charged carbon clusters (Cn, n = 5,7,9 and Cn+, n = 4,5) and to simulate the mass spectrum of the acetylene molecule (C2H2).
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Affiliation(s)
- Néstor F Aguirre
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid , 28049 Madrid, Spain
| | - Paul-Antoine Hervieux
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg , 67000 Strasbourg, France
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia) , 28049 Madrid, Spain
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia) , 28049 Madrid, Spain
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9
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Piekarski DG, Delaunay R, Mika A, Maclot S, Adoui L, Martín F, Alcamí M, Huber BA, Rousseau P, Díaz-Tendero S, Domaracka A. Production of doubly-charged highly reactive species from the long-chain amino acid GABA initiated by Ar9+ionization. Phys Chem Chem Phys 2017; 19:19609-19618. [DOI: 10.1039/c7cp00903h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We present a combined experimental and theoretical study of the fragmentation of multiply-charged γ-aminobutyric acid molecules (GABAz+,z= 2, 3) in the gas phase.
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Affiliation(s)
| | | | | | | | | | - Fernando Martín
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - Manuel Alcamí
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | | | | | - Sergio Díaz-Tendero
- Departamento de Química
- Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
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10
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Maclot S, Delaunay R, Piekarski DG, Domaracka A, Huber BA, Adoui L, Martín F, Alcamí M, Avaldi L, Bolognesi P, Díaz-Tendero S, Rousseau P. Determination of Energy-Transfer Distributions in Ionizing Ion-Molecule Collisions. PHYSICAL REVIEW LETTERS 2016; 117:073201. [PMID: 27563959 DOI: 10.1103/physrevlett.117.073201] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 06/06/2023]
Abstract
The ionization and fragmentation of the nucleoside thymidine in the gas phase has been investigated by combining ion collision with state-selected photoionization experiments and quantum chemistry calculations. The comparison between the mass spectra measured in both types of experiments allows us to accurately determine the distribution of the energy deposited in the ionized molecule as a result of the collision. The relation of two experimental techniques and theory shows a strong correlation between the excited states of the ionized molecule with the computed dissociation pathways, as well as with charge localization or delocalization.
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Affiliation(s)
- S Maclot
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - R Delaunay
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - D G Piekarski
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - A Domaracka
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - B A Huber
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - L Adoui
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
| | - F Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEANanociencia), Cantoblanco 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - M Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEANanociencia), Cantoblanco 28049 Madrid, Spain
| | - L Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy
| | - P Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy
| | - S Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Rousseau
- Normandie Université-CIMAP, UMR 6252 CEA/CNRS/ENSICAEN/UNICAEN, Boulevard Henri Becquerel, BP 5133-14070 Caen cedex 5, France
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11
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Martin S, Chen L, Brédy R, Bernard J, Cassimi A. Fragmentation of doubly charged HDO, H2O, and D2O molecules induced by proton and monocharged fluorine beam impact at 3 keV. J Chem Phys 2015; 142:094306. [PMID: 25747080 DOI: 10.1063/1.4913398] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Doubly charged ions HDO(2+), H2O(2+), and D2O(2+) were prepared selectively to triplet or singlet excited states in collisions with F(+) or H(+) projectiles at 3 keV. Excitation energies of dications following two-body or three-body dissociation channels were measured and compared with recent calculations using ab initio multi-reference configuration interaction method [Gervais et al., J. Chem. Phys. 131, 024302 (2009)]. For HDO(2+), preferential cleavage of O-H rather than O-D bond has been observed and the ratio between the populations of the fragmentation channels OD(+)_H(+) and OH(+)_D(+) were measured. The kinetic energy release has been measured and compared with previous experiments.
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Affiliation(s)
- S Martin
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - L Chen
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - R Brédy
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - J Bernard
- Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - A Cassimi
- CIMAP, GANIL Université de CAEN, Bd. H. Becquerel, Caen, France
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12
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Yamazaki K, Nakamura T, Niitsu N, Kanno M, Ueda K, Kono H. Communication: Two-step explosion processes of highly charged fullerene cations C60(q+) (q = 20-60). J Chem Phys 2014; 141:121105. [PMID: 25273405 DOI: 10.1063/1.4896656] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
To establish the fundamental understanding of the fragmentation dynamics of highly positive charged nano- and bio-materials, we carried out on-the-fly classical trajectory calculations on the fragmentation dynamics of C60(q+) (q = 20-60). We used the UB3LYP/3-21G level of density functional theory and the self-consistent charge density-functional based tight-binding theory. For q ≥ 20, we found that a two-step explosion mechanism governs the fragmentation dynamics: C60(q+) first ejects singly and multiply charged fast atomic cations C(z+) (z ≥ 1) via Coulomb explosions on a timescale of 10 fs to stabilize the remaining core cluster. Thermal evaporations of slow atomic and molecular fragments from the core cluster subsequently occur on a timescale of 100 fs to 1 ps. Increasing the charge q makes the fragments smaller. This two-step mechanism governs the fragmentation dynamics in the most likely case that the initial kinetic energy accumulated upon ionization to C60(q+) by ion impact or X-ray free electron laser is larger than 100 eV.
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Affiliation(s)
- Kaoru Yamazaki
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Takashi Nakamura
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Naoyuki Niitsu
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Manabu Kanno
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Hirohiko Kono
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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13
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Qian DB, Ma X, Chen Z, Li B, Zhang DC, Zhu XL, Wen WQ, Liu HP. New insight into power-law behavior of fragment size distributions in the C₆₀ multifragmentation regime. J Chem Phys 2014; 141:054307. [PMID: 25106587 DOI: 10.1063/1.4891812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Previous experimental work has shown that a phase transition in C60 multifragmentation induced by nanosecond laser occurs at almost constant temperature covering a wide range of laser fluency. Here the relative yields of ionic fragments (IFs) C(n)(+) (n = 1-20) resulting from the multifragmentation are measured within the phase transition region. By excluding two small IFs and magic IFs due to their abnormal behavior, the data for residual IFs are used to estimate the size distributions of primary intermediate-mass IFs in the multifragmentation regime. The distributions are found to obey power laws n(-τ). Furthermore, the exponent τ values have sensitive dependence on lower laser fluency and converge to a constant of about 2.4 ± 0.2 for larger fluencies. These observations are in good agreement with an explanation based on the Fisher droplet model, offering the tantalizing possibility of a liquid-to-gas phase transition in C60 systems.
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Affiliation(s)
- D B Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Z Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - B Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - D C Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X L Zhu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - W Q Wen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H P Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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14
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Seitz F, Zettergren H, Rousseau P, Wang Y, Chen T, Gatchell M, Alexander JD, Stockett MH, Rangama J, Chesnel JY, Capron M, Poully JC, Domaracka A, Méry A, Maclot S, Vizcaino V, Schmidt HT, Adoui L, Alcamí M, Tielens AGGM, Martín F, Huber BA, Cederquist H. Ions colliding with clusters of fullerenes—Decay pathways and covalent bond formations. J Chem Phys 2013; 139:034309. [DOI: 10.1063/1.4812790] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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15
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Chen L, Brédy R, Bernard J, Montagne G, Allouche AR, Martin S. Fragmentation of singly charged adenine induced by neutral fluorine beam impact at 3 keV. J Chem Phys 2011; 135:114309. [DOI: 10.1063/1.3621713] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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16
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Holm AIS, Johansson HAB, Cederquist H, Zettergren H. Dissociation and multiple ionization energies for five polycyclic aromatic hydrocarbon molecules. J Chem Phys 2011; 134:044301. [DOI: 10.1063/1.3541252] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Martin S, Chen L, Brédy R, Bernard J, Montagne G, Zhu X. Excitation and dissociation of tungsten hexacarbonyl W(CO)6: statistical and nonstatistical dissociation processes. J Chem Phys 2011; 134:034304. [PMID: 21261350 DOI: 10.1063/1.3523347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
We have studied the excitation and dissociation processes of the molecule W(CO)(6) in collisions with low kinetic energy (3 keV) protons, monocharged fluorine, and chlorine ions using double charge transfer spectroscopy. By analyzing the kinetic energy loss of the projectile anions, we measured the excitation energy distribution of the produced transient dications W(CO)(6)(2+). By coincidence measurements between the anions and the stable or fragments of W(CO)(6)(2+), we determined the energy distribution for each dissociation channel. Based on the experimental data, the emission of the first CO was tentatively attributed to a nonstatistical direct dissociation process and the emission of the second or more CO ligands was attributed to the statistical dissociation processes. The dissociation energies for the successive breaking of the W-CO bond were estimated using a cascade model. The ratio between charge separation and evaporation (by the loss of CO(+) and CO, respectively) channels was estimated to be 6% in the case of Cl(+) impact.
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Affiliation(s)
- S Martin
- Université de Lyon, F-69622, Lyon, France
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Brédy R, Bernard J, Chen L, Montagne G, Li B, Martin S. Fragmentation of adenine under energy control. J Chem Phys 2009; 130:114305. [DOI: 10.1063/1.3080162] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Calvo F, Díaz-Tendero S, Lebeault MA. Translational, rotational and vibrational energy partitioning in the sequential loss of carbon dimers from fullerenes. Phys Chem Chem Phys 2009; 11:6345-52. [DOI: 10.1039/b901557d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Alvarado F, Bernard J, Li B, Brédy R, Chen L, Hoekstra R, Martin S, Schlathölter T. Precise Determination of 2-Deoxy-D-Ribose Internal Energies after keV Proton Collisions. Chemphyschem 2008; 9:1254-8. [DOI: 10.1002/cphc.200800110] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rentenier A, Ruiz LF, Díaz-Tendero S, Zarour B, Moretto-Capelle P, Bordenave-Montesquieu D, Bordenave-Montesquieu A, Hervieux PA, Alcamí M, Politis MF, Hanssen J, Martín F. Absolute charge transfer and fragmentation cross sections in He2+-C60 collisions. PHYSICAL REVIEW LETTERS 2008; 100:183401. [PMID: 18518369 DOI: 10.1103/physrevlett.100.183401] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2007] [Indexed: 05/26/2023]
Abstract
We have determined absolute charge transfer and fragmentation cross sections in He2++C60 collisions in the impact-energy range 0.1-250 keV by using a combined experimental and theoretical approach. We have found that the cross sections for the formation of He+ and He0 are comparable in magnitude, which cannot be explained by the sole contribution of pure single and double electron capture but also by contribution of transfer-ionization processes that are important even at low impact energies. The results show that multifragmentation is important only at impact energies larger than 40 keV; at lower energies, sequential C2 evaporation is the dominant process.
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Affiliation(s)
- A Rentenier
- Laboratoire de Collisions, Agrégats et Reactivité, UMR 5589 CNRS, Université Paul Sabatier 3, 31062 Toulouse, France
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