Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV)
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional do INPA |
Texto Completo: | https://repositorio.inpa.gov.br/handle/1/15894 |
Resumo: | Isoprene, C5H8, is a biogenic volatile compound emitted from plants and animals, playing an important role in atmospheric chemistry. In this work, we have studied the ionic fragmentation of the isoprene molecule induced by high energy photons (synchrotron radiation), both at the valence (12.0, 14.0, 16.0, 18.0, and 21.0 eV) and carbon 1s edge (270 and 310 eV, respectively, below and above edge) energies. The ionic fragments were mass-analyzed using a Wiley-McLaren time-of-flight spectrometer (TOF) and single (PEPICO) and double ionization coincidence (PEPIPICO) spectra were obtained. As expected, the fragmentation degree increases with increasing energy. Below and above the carbon 1s edge, the fragmentation patterns are quite similar, and basically the same fragments are observed as compared to the spectra following valence-shell ionization. Stable doubly-charged ions were not observed. A PEPIPICO spectrum has shown that the main dissociation route for doubly-ionized species corresponds to the [CH3]+/[C4H2-5]+ ion pair. Intense fragmentation of the isoprene molecule has been observed following valence shell and core electron ionization. The observance of basically the same fragments when moving from valence to inner-shell suggests that basically the same fragmentation routes are present in both cases. All doubly (or multiply)-charged cations are unstable, at least on a microsecond scale. © 2015 Elsevier B.V. All rights reserved. |
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Bernini, Rafael BerrelhoCoutinho, Lúcia H.Nunez, C. V.Castilho, R. B. deSouza, Gerardo Gerson Bezerra de2020-05-19T21:03:17Z2020-05-19T21:03:17Z2015https://repositorio.inpa.gov.br/handle/1/1589410.1016/j.elspec.2015.03.011Isoprene, C5H8, is a biogenic volatile compound emitted from plants and animals, playing an important role in atmospheric chemistry. In this work, we have studied the ionic fragmentation of the isoprene molecule induced by high energy photons (synchrotron radiation), both at the valence (12.0, 14.0, 16.0, 18.0, and 21.0 eV) and carbon 1s edge (270 and 310 eV, respectively, below and above edge) energies. The ionic fragments were mass-analyzed using a Wiley-McLaren time-of-flight spectrometer (TOF) and single (PEPICO) and double ionization coincidence (PEPIPICO) spectra were obtained. As expected, the fragmentation degree increases with increasing energy. Below and above the carbon 1s edge, the fragmentation patterns are quite similar, and basically the same fragments are observed as compared to the spectra following valence-shell ionization. Stable doubly-charged ions were not observed. A PEPIPICO spectrum has shown that the main dissociation route for doubly-ionized species corresponds to the [CH3]+/[C4H2-5]+ ion pair. Intense fragmentation of the isoprene molecule has been observed following valence shell and core electron ionization. The observance of basically the same fragments when moving from valence to inner-shell suggests that basically the same fragmentation routes are present in both cases. All doubly (or multiply)-charged cations are unstable, at least on a microsecond scale. © 2015 Elsevier B.V. All rights reserved.Volume 202, Pags. 107-111Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessAtmospheric ChemistryDrug ProductsIonizationMass SpectrometryMoleculesPhotoionizationSynchrotron RadiationSynchrotronsDoubly Charged IonsFragmentation DegreeFragmentation PatternsHigh Energy PhotonsIonic FragmentationTime Of FlightTime-of-flight SpectrometerVolatile CompoundsIsopreneIonic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleJournal of Electron Spectroscopy and Related Phenomenaengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfartigo-inpa.pdfapplication/pdf708752https://repositorio.inpa.gov.br/bitstream/1/15894/1/artigo-inpa.pdf24791b22a44ecd0f320cd43786a6f42fMD511/158942020-05-19 17:19:51.147oai:repositorio:1/15894Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-05-19T21:19:51Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.en.fl_str_mv |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
title |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
spellingShingle |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) Bernini, Rafael Berrelho Atmospheric Chemistry Drug Products Ionization Mass Spectrometry Molecules Photoionization Synchrotron Radiation Synchrotrons Doubly Charged Ions Fragmentation Degree Fragmentation Patterns High Energy Photons Ionic Fragmentation Time Of Flight Time-of-flight Spectrometer Volatile Compounds Isoprene |
title_short |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
title_full |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
title_fullStr |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
title_full_unstemmed |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
title_sort |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
author |
Bernini, Rafael Berrelho |
author_facet |
Bernini, Rafael Berrelho Coutinho, Lúcia H. Nunez, C. V. Castilho, R. B. de Souza, Gerardo Gerson Bezerra de |
author_role |
author |
author2 |
Coutinho, Lúcia H. Nunez, C. V. Castilho, R. B. de Souza, Gerardo Gerson Bezerra de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Bernini, Rafael Berrelho Coutinho, Lúcia H. Nunez, C. V. Castilho, R. B. de Souza, Gerardo Gerson Bezerra de |
dc.subject.eng.fl_str_mv |
Atmospheric Chemistry Drug Products Ionization Mass Spectrometry Molecules Photoionization Synchrotron Radiation Synchrotrons Doubly Charged Ions Fragmentation Degree Fragmentation Patterns High Energy Photons Ionic Fragmentation Time Of Flight Time-of-flight Spectrometer Volatile Compounds Isoprene |
topic |
Atmospheric Chemistry Drug Products Ionization Mass Spectrometry Molecules Photoionization Synchrotron Radiation Synchrotrons Doubly Charged Ions Fragmentation Degree Fragmentation Patterns High Energy Photons Ionic Fragmentation Time Of Flight Time-of-flight Spectrometer Volatile Compounds Isoprene |
description |
Isoprene, C5H8, is a biogenic volatile compound emitted from plants and animals, playing an important role in atmospheric chemistry. In this work, we have studied the ionic fragmentation of the isoprene molecule induced by high energy photons (synchrotron radiation), both at the valence (12.0, 14.0, 16.0, 18.0, and 21.0 eV) and carbon 1s edge (270 and 310 eV, respectively, below and above edge) energies. The ionic fragments were mass-analyzed using a Wiley-McLaren time-of-flight spectrometer (TOF) and single (PEPICO) and double ionization coincidence (PEPIPICO) spectra were obtained. As expected, the fragmentation degree increases with increasing energy. Below and above the carbon 1s edge, the fragmentation patterns are quite similar, and basically the same fragments are observed as compared to the spectra following valence-shell ionization. Stable doubly-charged ions were not observed. A PEPIPICO spectrum has shown that the main dissociation route for doubly-ionized species corresponds to the [CH3]+/[C4H2-5]+ ion pair. Intense fragmentation of the isoprene molecule has been observed following valence shell and core electron ionization. The observance of basically the same fragments when moving from valence to inner-shell suggests that basically the same fragmentation routes are present in both cases. All doubly (or multiply)-charged cations are unstable, at least on a microsecond scale. © 2015 Elsevier B.V. All rights reserved. |
publishDate |
2015 |
dc.date.issued.fl_str_mv |
2015 |
dc.date.accessioned.fl_str_mv |
2020-05-19T21:03:17Z |
dc.date.available.fl_str_mv |
2020-05-19T21:03:17Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.inpa.gov.br/handle/1/15894 |
dc.identifier.doi.none.fl_str_mv |
10.1016/j.elspec.2015.03.011 |
url |
https://repositorio.inpa.gov.br/handle/1/15894 |
identifier_str_mv |
10.1016/j.elspec.2015.03.011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Volume 202, Pags. 107-111 |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Journal of Electron Spectroscopy and Related Phenomena |
publisher.none.fl_str_mv |
Journal of Electron Spectroscopy and Related Phenomena |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional do INPA instname:Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA |
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Repositório Institucional do INPA |
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