1
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Kawaguchi T, Kitagawa K, Toyota K, Kozaki M, Okada K, Nakashima N, Yatsuhashi T. Smallest Organic Tetracation in the Gas Phase: Stability of Multiply Charged Diiodoacetylene Produced in Intense Femtosecond Laser Fields. J Phys Chem A 2021; 125:8014-8024. [PMID: 34491746 DOI: 10.1021/acs.jpca.1c06390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Coulomb explosion imaging, which is the reconstruction of a molecular structure by measuring the three-dimensional momenta of atomic ions formed by a Coulomb explosion of multiply charged molecular cations (MMCs), has been utilized widely. In contrast, intact MMCs, whose properties and reactions are interesting from both fundamental and applied scientific perspectives, themselves have been little explored to date. This study demonstrates that the four-atom molecule diiodoacetylene (DIA) can survive as a long-lived species in the gas phase after the removal of four electrons in intense femtosecond laser fields. The electron configurations of the equilibrium structures of the electronic ground states calculated by the complete active space self-consistent field (CASSCF) method reveal the stability of multiply charged DIA. The dissociation energies are estimated to be 3.01, 3.59, 2.57, 1.82, and 1.61 eV for neutral, cation radical, dication, trication radical, and tetracation, respectively. A fairly deep potential well suggests that a DIA tetracation is metastable toward dissociation, whereas the repulsive potential of a pentacation radical confirms its absence in the mass spectrum. With their sufficiently long lifetimes, minimum number of atoms, and simple dissociation paths, DIA MMCs are promising candidates for further experimental and theoretical investigations of multiply charged ion chemistry.
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Affiliation(s)
- Takashi Kawaguchi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 Japan
| | - Kosei Kitagawa
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 Japan
| | - Kazuo Toyota
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 Japan
| | - Masatoshi Kozaki
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 Japan
| | - Keiji Okada
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 Japan
| | - Nobuaki Nakashima
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 Japan
| | - Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585 Japan
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2
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Mandal S, Gopal R, Srinivas H, D'Elia A, Sen A, Sen S, Richter R, Coreno M, Bapat B, Mudrich M, Sharma V, Krishnan SR. Coincident angle-resolved state-selective photoelectron spectroscopy of acetylene molecules: a candidate system for time-resolved dynamics. Faraday Discuss 2021; 228:242-265. [PMID: 33687396 DOI: 10.1039/d0fd00120a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The acetylene-vinylidene system serves as a benchmark for investigations of ultrafast dynamical processes where the coupling of the electronic and nuclear degrees of freedom provides a fertile playground to explore the femto- and sub-femto-second physics with coherent extreme-ultraviolet (EUV) photon sources both on the table-top as well as free-electron lasers. We focus on detailed investigations of this molecular system in the photon energy range 19-40 eV where EUV pulses can probe the dynamics effectively. We employ photoelectron-photoion coincidence (PEPICO) spectroscopy to uncover hitherto unrevealed aspects of this system. In this work, the role of excited states of the C2H2+ cation, the primary photoion, is specifically addressed. From photoelectron energy spectra and angular distributions, the nature of the dissociation and isomerization channels is discerned. Exploiting the 4π-collection geometry of the velocity map imaging spectrometer, we not only probe pathways where the efficiency of photoionization is inherently high but also perform PEPICO spectroscopy on relatively weak channels.
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Affiliation(s)
- S Mandal
- Indian Institute of Science Education and Research, Pune 411008, India
| | - R Gopal
- Tata Institute of Fundamental Research, Hyderabad 500107, India
| | - H Srinivas
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - A D'Elia
- IOM-CNR, Laboratorio TASC, Basovizza SS-14, km 163.5, 34149 Trieste, Italy
| | - A Sen
- Indian Institute of Science Education and Research, Pune 411008, India
| | - S Sen
- Indian Institute of Technology Hyderabad, Kandi 502285, India.
| | - R Richter
- Elettra-Sincrotrone Trieste, 34149 Basovizza, Italy
| | - M Coreno
- Istituto di Struttura della Materia - Consiglio Nazionale delle Ricerche (ISM-CNR), 34149 Trieste, Italy and INFN-LNF, via Enrico Fermi 54, 00044 Frascati, Italy
| | - B Bapat
- Indian Institute of Science Education and Research, Pune 411008, India
| | - M Mudrich
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark and Department of Physics, QuCenDiEm-Group, Indian Institute of Technology Madras, Chennai 600036, India.
| | - V Sharma
- Indian Institute of Technology Hyderabad, Kandi 502285, India.
| | - S R Krishnan
- Department of Physics, QuCenDiEm-Group, Indian Institute of Technology Madras, Chennai 600036, India.
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3
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Falcinelli S, Rosi M. Production and Characterization of Molecular Dications: Experimental and Theoretical Efforts. Molecules 2020; 25:molecules25184157. [PMID: 32932839 PMCID: PMC7571021 DOI: 10.3390/molecules25184157] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 11/16/2022] Open
Abstract
Molecular dications are doubly charged cations of importance in flames, plasma chemistry and physics and in the chemistry of the upper atmosphere of Planets. Furthermore, they are exotic species able to store a considerable amount of energy at a molecular level. This high energy content of several eV can be easily released as translational energy of the two fragment monocations generated by their Coulomb explosion. For such a reason, they were proposed as a new kind of alternative propellant. The present topic review paper reports on an overview of the main contributions made by the authors’ research groups in the generation and characterization of simple molecular dications during the last 40 years of coupling experimental and theoretical efforts.
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Affiliation(s)
- Stefano Falcinelli
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
- Correspondence: (S.F.); (M.R.); Tel.: +39-075-585-3862 (S.F.); +39-075-585-3858 (M.R.)
| | - Marzio Rosi
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
- SCITEC, CNR, Via Elce di Sotto 8, 06123 Perugia, Italy
- Correspondence: (S.F.); (M.R.); Tel.: +39-075-585-3862 (S.F.); +39-075-585-3858 (M.R.)
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4
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Liekhus-Schmaltz C, Zhu X, McCracken GA, Cryan JP, Martinez TJ, Bucksbaum PH. Strictly non-adiabatic quantum control of the acetylene dication using an infrared field. J Chem Phys 2020; 152:184302. [DOI: 10.1063/5.0007058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Chelsea Liekhus-Schmaltz
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Xiaolei Zhu
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Gregory A. McCracken
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
| | - James P. Cryan
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Todd J. Martinez
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Philip H. Bucksbaum
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Department of Physics, Stanford University, Stanford, California 94305, USA
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
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5
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Falcinelli S, Rosi M, Pirani F, Bassi D, Alagia M, Schio L, Richter R, Stranges S, Balucani N, Lorent V, Vecchiocattivi F. Angular Distribution of Ion Products in the Double Photoionization of Propylene Oxide. Front Chem 2019; 7:621. [PMID: 31572712 PMCID: PMC6749015 DOI: 10.3389/fchem.2019.00621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 08/29/2019] [Indexed: 11/13/2022] Open
Abstract
A photoelectron-photoion-photoion coincidence technique, using an ion imaging detector and tunable synchrotron radiation in the 18.0–37.0 eV photon energy range, inducing the ejection of molecular valence electrons, has been applied to study the double ionization of the propylene oxide, a simple prototype chiral molecule. The experiment performed at the Elettra Synchrotron Facility (Trieste, Italy) allowed to determine angular distributions for ions produced by the two-body dissociation reactions following the Coulomb explosion of the intermediate (C3H6O)2+ molecular dication. The analysis of the coincidence spectra recorded at different photon energies was done in order to determine the dependence of the β anisotropy parameter on the photon energy for the investigated two-body fragmentation channels. In particular, the reaction leading to CH3+ + C2H3O+ appears to be characterized by an increase of β, from β ≈ 0.00 up to β = 0.59, as the photon energy increases from 29.7 to 37.0 eV, respectively. This new observation confirms that the dissociation channel producing CH3+ and C2H3O+ final ions can occur with two different microscopic mechanisms as already indicated by the bimodality obtained in the kinetic energy released (KER) distributions as a function of the photon energy in a recent study. Energetic considerations suggest that experimental data are compatible with the formation of two different stable isomers of C2H3O+: acetyl and oxiranyl cations. These new experimental data are inherently relevant and are mandatory information for further experimental and theoretical investigations involving oriented chiral molecules and linearly or circularly polarized radiation. This work is in progress in our laboratory.
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Affiliation(s)
- Stefano Falcinelli
- Department of Civil and Environmental Engineering, University of Perugia, Perugia, Italy
| | - Marzio Rosi
- Department of Civil and Environmental Engineering, University of Perugia, Perugia, Italy
| | - Fernando Pirani
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Perugia, Italy
| | - Davide Bassi
- Department of Physics, University of Trento, Trento, Italy
| | | | - Luca Schio
- IOM-CNR Tasc, Trieste, Italy.,Department of Basic and Applied Sciences for Engineering (SBAI), University of Rome "Sapienza", Rome, Italy
| | | | - Stefano Stranges
- IOM-CNR Tasc, Trieste, Italy.,Department of Chemistry and Drug Technologies, University of Rome "Sapienza", Rome, Italy
| | - Nadia Balucani
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Perugia, Italy
| | - Vincent Lorent
- Laboratoire de physique des lasers, Université Paris 13 (UP13) - Institut Galilée - CNRS LPL UMR7538, Villetaneuse, France
| | - Franco Vecchiocattivi
- Department of Civil and Environmental Engineering, University of Perugia, Perugia, Italy
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6
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Zhang Y, Wang B, Wei L, Jiang T, Yu W, Hutton R, Zou Y, Chen L, Wei B. Proton migration in hydrocarbons induced by slow highly charged ion impact. J Chem Phys 2019; 150:204303. [PMID: 31153159 DOI: 10.1063/1.5088690] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Different from most of the previous studies using light or photons, we use highly charged ions as projectiles to activate proton migration in the smallest saturated and unsaturated hydrocarbon molecules, i.e., CH4 and C2H2. The H3 + formation channel (H3 + + CH+) and isomerization channel (C+ + CH2 +), serving as indicators of proton migration, are observed in the fragmentation of CH4 and C2H2 dications. Corresponding kinematical information, i.e., kinetic energy release, is for the first time obtained in the collisions with highly charged ions. In particular, for the C+ + CH2 + channel, a new pathway is identified, which is tentatively attributed to the isomerization on high-lying states of acetylene dication. The kinetic energy release spectra for other two-body breakup channels are also determined and precursor dication states could thus be identified.
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Affiliation(s)
- Y Zhang
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - B Wang
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - L Wei
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - T Jiang
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - W Yu
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - R Hutton
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - Y Zou
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - L Chen
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - B Wei
- Department of Nuclear Science and Technology, Institute of Modern Physics, Fudan University, Shanghai 200433, China
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7
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Jochim B, Berry B, Severt T, Feizollah P, Zohrabi M, P KR, Wells E, Carnes KD, Ben-Itzhak I. Dependence on the Initial Configuration of Strong Field-Driven Isomerization of C 2H 2 Cations and Anions. J Phys Chem Lett 2019; 10:2320-2327. [PMID: 31002520 DOI: 10.1021/acs.jpclett.9b00520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We have investigated the femtosecond laser-induced fragmentation of C2H2 q ion beam targets in various initial configurations, including acetylene (linear HCCH), vinylidene (H2CC), and cis/ trans. The initial configuration is shown to have a tremendous impact on the branching ratio of acetylene-like (CH q1 + CH q2) and vinylidene-like (C q1' + CH2 q2') dissociation of a specific C2H2 q molecular ion. In particular, whereas C2H2+ generated from C2H2, a linear HCCH target, exhibits comparable levels of acetylene-like and vinylidene-like fragmentation, vinylidene or cis/ trans configuration ion beams preferably undergo vinylidene-like fragmentation, with an acetylene branching ratio ranging from 13.9% to zero.
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Affiliation(s)
- Bethany Jochim
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
| | - Ben Berry
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
| | - T Severt
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
| | - Peyman Feizollah
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
| | - M Zohrabi
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
| | - Kanaka Raju P
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
| | - E Wells
- Department of Physics , Augustana University , Sioux Falls , South Dakota 57197 , United States
| | - K D Carnes
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
| | - I Ben-Itzhak
- J. R. Macdonald Laboratory, Department of Physics , Kansas State University , Manhattan , Kansas 66506 , United States
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8
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Falcinelli S, Vecchiocattivi F, Alagia M, Schio L, Richter R, Stranges S, Catone D, Arruda MS, Mendes LAV, Palazzetti F, Aquilanti V, Pirani F. Double photoionization of propylene oxide: A coincidence study of the ejection of a pair of valence-shell electrons. J Chem Phys 2018; 148:114302. [PMID: 29566526 DOI: 10.1063/1.5024408] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Propylene oxide, a favorite target of experimental and theoretical studies of circular dichroism, was recently discovered in interstellar space, further amplifying the attention to its role in the current debate on protobiological homochirality. In the present work, a photoelectron-photoion-photoion coincidence technique, using an ion-imaging detector and tunable synchrotron radiation in the 18.0-37.0 eV energy range, permits us (i) to observe six double ionization fragmentation channels, their relative yields being accounted for about two-thirds by the couple (C2H4+, CH2O+) and one-fifth by (C2H3+, CH3O+); (ii) to measure thresholds for their openings as a function of photon energy; and (iii) to unravel a pronounced bimodality for a kinetic-energy-released distribution, fingerprint of competitive non-adiabatic mechanisms.
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Affiliation(s)
- Stefano Falcinelli
- Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, Via G. Duranti 93, 06125 Perugia, Italy
| | - Franco Vecchiocattivi
- Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, Via G. Duranti 93, 06125 Perugia, Italy
| | - Michele Alagia
- IOM-CNR Tasc, Km 163.5, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Luca Schio
- IOM-CNR Tasc, Km 163.5, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Robert Richter
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Stefano Stranges
- IOM-CNR Tasc, Km 163.5, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Daniele Catone
- Istituto di Struttura della Materia (CNR-ISM), Area della Ricerca di Roma Tor Vergata, Via del Fosso del Cavaliere, 100-00133 Roma, Italy
| | - Manuela S Arruda
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Luiz A V Mendes
- Instituto de Fìsica, Universidade Federal da Bahia, Campus Universitario de Ondina, 40210-340 Salvador, BA, Brazil
| | - Federico Palazzetti
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Vincenzo Aquilanti
- Istituto di Struttura della Materia (CNR-ISM), Area della Ricerca di Roma Tor Vergata, Via del Fosso del Cavaliere, 100-00133 Roma, Italy
| | - Fernando Pirani
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
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9
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Sebastiani B, Giorgini M, Falcinelli S. Chemical Characterization of Lodoicea maldivica Fruit. Chem Biodivers 2017; 14. [PMID: 28452174 DOI: 10.1002/cbdv.201700109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/25/2017] [Indexed: 11/12/2022]
Abstract
In the present study, we report the attempt to characterize the chemical composition of fruit kernel of Lodoicea maldivica coco nucifera palm (commonly named as 'Coco de mer') by gas chromatographic method. The analysis was performed by HS-SPME and GC/MS techniques to determine volatile aroma, sterol, and fatty acid composition profiles in the internal and external pulp of two distinct coconuts. Although no qualitative differences in flavour composition were observed between the two analysed coconuts and the relative two pulp parts, variations in the abundance levels of the prominent compounds have been recorded. The averaged quantity of total phytosterols, resulting from the two analysed 'Coco de mer' samples, was almost constant in both kernels coconut, being 24.5 μg/g (of dry net matter) for the external, and 26.9 μg/g (of dry net matter) for the internal portion. In both coconuts, the fatty acid pattern composition was characterized by seven saturated acids ranged from C14:0 (myristic) to C20:0 (arachidic) and two monounsaturated acids, the palmitoleic (C16:1, ω7) and the oleic (C18:1, ω9). Palmitic acid (C16:0) was the predominant one with an average contribution of about 49.0%, followed by pentadecanoic 16.5%, stearic (C18:0) 11.6%, and myristic (C14:0) 9.9% acids in all two examined kernel portions.
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Affiliation(s)
- Bartolomeo Sebastiani
- Department of Chemistry Biology and Biotechnologies, University of Perugia, Via Elce di Sotto, 8, 06123, Perugia, Italy
| | | | - Stefano Falcinelli
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125, Perugia, Italy
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10
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Wolter B, Pullen MG, Le AT, Baudisch M, Doblhoff-Dier K, Senftleben A, Hemmer M, Schröter CD, Ullrich J, Pfeifer T, Moshammer R, Gräfe S, Vendrell O, Lin CD, Biegert J. Ultrafast electron diffraction imaging of bond breaking in di-ionized acetylene. Science 2017; 354:308-312. [PMID: 27846561 DOI: 10.1126/science.aah3429] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 09/19/2016] [Indexed: 01/27/2023]
Abstract
Visualizing chemical reactions as they occur requires atomic spatial and femtosecond temporal resolution. Here, we report imaging of the molecular structure of acetylene (C2H2) 9 femtoseconds after ionization. Using mid-infrared laser-induced electron diffraction (LIED), we obtained snapshots as a proton departs the [C2H2]2+ ion. By introducing an additional laser field, we also demonstrate control over the ultrafast dissociation process and resolve different bond dynamics for molecules oriented parallel versus perpendicular to the LIED field. These measurements are in excellent agreement with a quantum chemical description of field-dressed molecular dynamics.
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Affiliation(s)
- B Wolter
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - M G Pullen
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - A-T Le
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS 66506-2604, USA
| | - M Baudisch
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - K Doblhoff-Dier
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, Post Office Box 9502, 2300 RA Leiden, Netherlands
| | - A Senftleben
- Universität Kassel, Institut für Physik und CINSaT, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - M Hemmer
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain.,Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron (DESY), Centre for Ultrafast Imaging (CUI), 22607 Hamburg, Germany
| | - C D Schröter
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - J Ullrich
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.,Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - T Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R Moshammer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - S Gräfe
- Institute for Physical Chemistry, Friedrich-Schiller University Jena, 07743 Jena, Germany.,Abbe Center of Photonics, Friedrich-Schiller-University Jena, 07743 Jena, Germany
| | - O Vendrell
- Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron (DESY), Centre for Ultrafast Imaging (CUI), 22607 Hamburg, Germany.,Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - C D Lin
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS 66506-2604, USA
| | - J Biegert
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain. .,Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, 08010 Barcelona, Spain
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11
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Falcinelli S, Candori P, Pirani F, Vecchiocattivi F. The role of charge transfer in the stability and reactivity of chemical systems from experimental findings. Phys Chem Chem Phys 2017; 19:6933-6944. [DOI: 10.1039/c7cp00614d] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phenomena are described within a unifying picture, by isolating charge/electron transfer as an interaction component triggering chemical reactivity.
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Affiliation(s)
- S. Falcinelli
- Department of Civil and Environmental Engineering
- University of Perugia
- 06125 Perugia
- Italy
| | - P. Candori
- Department of Civil and Environmental Engineering
- University of Perugia
- 06125 Perugia
- Italy
| | - F. Pirani
- Department of Chemistry
- Biology and Biotechnologies
- University of Perugia
- 06123 Perugia
- Italy
| | - F. Vecchiocattivi
- Department of Civil and Environmental Engineering
- University of Perugia
- 06125 Perugia
- Italy
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12
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The escape of O+ ions from the atmosphere: An explanation of the observed ion density profiles on Mars. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Falcinelli S, Alagia M, Farrar JM, Kalogerakis KS, Pirani F, Richter R, Schio L, Stranges S, Rosi M, Vecchiocattivi F. Angular and energy distributions of fragment ions in dissociative double photoionization of acetylene molecules in the 31.9-50.0 eV photon energy range. J Chem Phys 2016. [DOI: 10.1063/1.4962915] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Stefano Falcinelli
- Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, 06125 Perugia, Italy
| | | | - James M. Farrar
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
| | | | - Fernando Pirani
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, 06123 Perugia, Italy
| | - Robert Richter
- Sincrotrone Trieste, Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Luca Schio
- IOM CNR Laboratorio TASC, 34012 Trieste, Italy
| | - Stefano Stranges
- IOM CNR Laboratorio TASC, 34012 Trieste, Italy
- Dipartimento di Chimica e Tecnologia del Farmaco, Università di Roma “La Sapienza,” 00185 Rome, Italy
| | - Marzio Rosi
- Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, 06125 Perugia, Italy
| | - Franco Vecchiocattivi
- Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, 06125 Perugia, Italy
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Falcinelli S, Rosi M, Cavalli S, Pirani F, Vecchiocattivi F. Stereoselectivity in Autoionization Reactions of Hydrogenated Molecules by Metastable Noble Gas Atoms: The Role of Electronic Couplings. Chemistry 2016; 22:12518-26. [PMID: 27470487 DOI: 10.1002/chem.201601811] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Indexed: 11/09/2022]
Abstract
Focus in the present paper is on the analysis of total and partial ionization cross sections, measured in absolute value as a function of the collision energy, representative of the probability of ionic product formation in selected electronic states in Ne*-H2 O, H2 S, and NH3 collisions. In order to characterize the imaginary part of the optical potential, related to electronic couplings, we generalize a methodology to obtain direct information on the opacity function of these reactions. Such a methodology has been recently exploited to test the real part of the optical potential (S. Falcinelli et al., Chem. Eur. J., 2016, 22, 764-771). Depending on the balance of noncovalent contributions, the real part controls the approach of neutral reactants, the removal of ionic products, and the structure of the transition state. Strength, range, and stereoselectivity of electronic couplings, triggering these and many other reactions, are directly obtained from the present investigation.
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Affiliation(s)
- Stefano Falcinelli
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125, Perugia, Italy.
| | - Marzio Rosi
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125, Perugia, Italy
| | - Simonetta Cavalli
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy
| | - Fernando Pirani
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy
| | - Franco Vecchiocattivi
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125, Perugia, Italy
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Yatsuhashi T, Toyota K, Mitsubayashi N, Kozaki M, Okada K, Nakashima N. Intact Four-atom Organic Tetracation Stabilized by Charge Localization in the Gas Phase. Chemphyschem 2016; 17:2977-2981. [DOI: 10.1002/cphc.201600555] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Tomoyuki Yatsuhashi
- Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi Osaka 558-8585 Japan
- PRESTO; Japan Science and Technology Agency; 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Kazuo Toyota
- Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi Osaka 558-8585 Japan
| | - Naoya Mitsubayashi
- Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi Osaka 558-8585 Japan
| | - Masatoshi Kozaki
- Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi Osaka 558-8585 Japan
| | - Keiji Okada
- Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi Osaka 558-8585 Japan
| | - Nobuaki Nakashima
- Graduate School of Science; Osaka City University; 3-3-138 Sugimoto, Sumiyoshi Osaka 558-8585 Japan
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Liekhus-Schmaltz CE, Tenney I, Osipov T, Sanchez-Gonzalez A, Berrah N, Boll R, Bomme C, Bostedt C, Bozek JD, Carron S, Coffee R, Devin J, Erk B, Ferguson KR, Field RW, Foucar L, Frasinski LJ, Glownia JM, Gühr M, Kamalov A, Krzywinski J, Li H, Marangos JP, Martinez TJ, McFarland BK, Miyabe S, Murphy B, Natan A, Rolles D, Rudenko A, Siano M, Simpson ER, Spector L, Swiggers M, Walke D, Wang S, Weber T, Bucksbaum PH, Petrovic VS. Ultrafast isomerization initiated by X-ray core ionization. Nat Commun 2015; 6:8199. [DOI: 10.1038/ncomms9199] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 07/28/2015] [Indexed: 11/09/2022] Open
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Salén P, Kamińska M, Squibb RJ, Richter R, Alagia M, Stranges S, van der Meulen P, Eland JHD, Feifel R, Zhaunerchyk V. Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation. Phys Chem Chem Phys 2014; 16:15231-40. [DOI: 10.1039/c4cp01067a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Alagia M, Bodo E, Decleva P, Falcinelli S, Ponzi A, Richter R, Stranges S. The soft X-ray absorption spectrum of the allyl free radical. Phys Chem Chem Phys 2013; 15:1310-8. [PMID: 23232557 DOI: 10.1039/c2cp43466k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The first experimental study of the X-ray absorption spectrum (XAS) of the allyl free radical, CH(2)CHCH(2), is reported. A supersonic He seeded beam of hyperthermal allyl radicals was crossed by a high resolution synchrotron radiation (SR) in the focus of a 3D ion momentum imaging time-of-flight (TOF) spectrometer to investigate the soft X-ray absorption and fragmentation processes. The XAS, recorded as Total-Ion-Yield (TIY), is dominated by C1s electron excitations from either the central carbon atom, C(C), or the two terminal carbon atoms, C(T), to the frontier orbitals, the semi-occupied-molecular-orbital (SOMO) and the lowest-unoccupied-molecular-orbital (LUMO). All of the intense features in the XAS could only be assigned with the aid of ab initio spectral simulation at the Multi-Configuration Self-Consistent-Field (MCSCF) level of theory, this level being required because of the multi-reference nature of the core-excited state wavefunctions of the open shell molecule. The ionization energies (IEs) of the singlet and triplet states of the C1s ionized allyl radical (XPS) were also calculated at the MCSCF level.
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Affiliation(s)
- M Alagia
- IOM-CNR, Laboratorio TASC, Trieste, Italy
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Production of ions at high energy and its role in extraterrestrial environments. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2012. [DOI: 10.1007/s12210-012-0215-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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