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Bolognesi P, Carravetta V, Sementa L, Barcaro G, Monti S, Manjari Mishra P, Cartoni A, Castrovilli MC, Chiarinelli J, Tosic S, Marinkovic BP, Richter R, Avaldi L. Core Shell Investigation of 2-nitroimidazole. Front Chem 2019; 7:151. [PMID: 31001511 PMCID: PMC6454003 DOI: 10.3389/fchem.2019.00151] [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: 01/04/2019] [Accepted: 02/28/2019] [Indexed: 02/01/2023] Open
Abstract
Tunability and selectivity of synchrotron radiation have been used to study the excitation and ionization of 2-nitroimidazole at the C, N, and O K-edges. The combination of a set of different measurements (X-ray photoelectron spectroscopy, near-edge photoabsorption spectroscopy, Resonant Auger electron spectroscopy, and mass spectrometry) and computational modeling have successfully disclosed local effects due to the chemical environment on both excitation/ionization and fragmentation of the molecule.
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Affiliation(s)
- Paola Bolognesi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy
| | | | - Luca Sementa
- CNR-Istituto per i Processi Chimico Fisici, Pisa, Italy
| | | | - Susanna Monti
- CNR-Istituto di Chimica dei Composti Organo Metallici, Pisa, Italy
| | - Preeti Manjari Mishra
- Stored and Cooled Ions Division, Max Planck Institute for Nuclear Physics, Heidelberg, Germany
| | - Antonella Cartoni
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy.,Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
| | - Mattea C Castrovilli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy
| | - Jacopo Chiarinelli
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy.,Dipartimento di Scienze, Università degli Studi di Roma 3, Rome, Italy
| | - Sanja Tosic
- Institute of Physics, University of Belgrade, Belgrade, Serbia
| | | | - Robert Richter
- Elettra Sincrotrone Trieste, Area Science Park, Trieste, Italy
| | - Lorenzo Avaldi
- CNR-Istituto di Struttura della Materia, Area della Ricerca di Roma 1, Montelibretti, Italy
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Nagaoka SI, Fukuzawa H, Prümper G, Takemoto M, Takahashi O, Yamaguchi K, Kakiuchi T, Tabayashi K, Suzuki IH, Harries JR, Tamenori Y, Ueda K. A Study To Control Chemical Reactions Using Si:2p Core Ionization: Site-Specific Fragmentation. J Phys Chem A 2011; 115:8822-31. [DOI: 10.1021/jp203664r] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shin-ichi Nagaoka
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Hironobu Fukuzawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Georg Prümper
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Mai Takemoto
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Osamu Takahashi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Katsuhiro Yamaguchi
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Takuhiro Kakiuchi
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Kiyohiko Tabayashi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Isao H. Suzuki
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
| | - James R. Harries
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198, Japan
| | - Yusuke Tamenori
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198, Japan
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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Sakai M, Okada K. Effect of fluoro substitution on the fragmentation of the K-shell excited/ionized pyridine studied by electron impact. JOURNAL OF MASS SPECTROMETRY : JMS 2011; 46:666-671. [PMID: 21744416 DOI: 10.1002/jms.1936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Fragmentation of the pyridine ring followed by K-shell excitation/ionization has been studied with 2-fluoropyridine (2FPy) by electron impact. Ab initio molecular orbital (MO) calculations were also carried out to investigate the electronic states correlating with specific fragment ions. The fragment ions are produced characteristically at the N 1s edge, while the spectra observed at the F 1s and C 1s edges exhibit a small difference from that at the valence ionization. The production of the C(4)H(2)(+), C(4)H(3)(+) and C(4)H(2)F(+) ions indicates that the cleavage of the N-C6 and C2-C3 bonds or the N-C2 and C5-C6 bonds is likely to occur after the N 1s excitation/ionization. Ab initio MO calculations indicate that the former fission is likely to proceed through the n(N)(1)π(2)(1)π(3)(2) and n(N)(0)π(2)(2)π(3)(2) excited states of the parent molecular dication. On the other hand, the breakage of the N-C2 and C4-C5 bonds, which specifically proceeds at the N 1s edge for 2-methylpyridine, does not occur for 2FPy. The present calculation reveals that the products of this channel are unstable by the electronegativity of fluorine and that the relative energy of the Auger-final states of 2FPy is lowered by the reorganization and electron correlation effects.
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Affiliation(s)
- Masamichi Sakai
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
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Sakai M, Okada K, Ohno K, Tabayashi K. Specific fragmentation of the K-shell excited/ionized pyridine derivatives studied by electron impact: 2-, 3- and 4-methylpyridine. JOURNAL OF MASS SPECTROMETRY : JMS 2010; 45:306-312. [PMID: 20166104 DOI: 10.1002/jms.1717] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Fragmentation of the pyridine ring upon K-shell excitation/ionization has been studied with gaseous 2-, 3- and 4-methylpyridine by the electron-impact method. Ab initio molecular orbital (MO) calculations were also carried out to explore electronic states correlating with specific fragments. Some specific fragmentation channels were identified from the ionic fragments enhanced characteristically at the N 1s edge. Yields of the C(2)HN(+) and C(5)H(5)(+)/C(5)H(6)(+) ions show that the fission of the N-C2 and C4-C5/C5-C6 bonds of the ring is likely to occur after the N 1s excitation and ionization. Ab initio MO calculations for the 2-methylpyridine molecule indicate that the dissociation channels to produce these ions are only accessible through the excited states of the parent molecular dication, which can be formed by Auger decays after the N 1s ionization. Fragment ions via hydrogen rearrangement are produced as well, but the rearrangement is not a phenomenon specific to the K-shell excitation/ionization.
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Affiliation(s)
- Masamichi Sakai
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
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Okada K, Sakai M, Ohno K. Specific Fragmentation of K-Shell Excited/Ionized Pyridine Derivatives Studied by Electron Impact: 2-Amino-3-methylpyridine and 3-Methylpyridine. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1580] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Geronés M, Erben MF, Romano RM, Della Védova CO, Yao L, Ge M. He I Photoelectron Spectra and Valence Synchrotron Photoionization for XC(O)SCl (X = F, Cl) Compounds. J Phys Chem A 2008; 112:2228-34. [DOI: 10.1021/jp7101034] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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