Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV)
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,...
| Autor principal: | Bernini, Rafael Berrelho |
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| Outros Autores: | Coutinho, Lúcia H., Nunez, C. V., Castilho, R. B. de, Souza, Gerardo Gerson Bezerra de |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Electron Spectroscopy and Related Phenomena
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/15894 |
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oai:repositorio:1-15894 |
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dspace |
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oai:repositorio:1-15894 Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) Bernini, Rafael Berrelho Coutinho, Lúcia H. Nunez, C. V. Castilho, R. B. de Souza, Gerardo Gerson Bezerra de 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 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. 2020-05-19T21:03:17Z 2020-05-19T21:03:17Z 2015 Artigo https://repositorio.inpa.gov.br/handle/1/15894 10.1016/j.elspec.2015.03.011 en Volume 202, Pags. 107-111 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Journal of Electron Spectroscopy and Related Phenomena |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| 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 |
| spellingShingle |
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 Bernini, Rafael Berrelho Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
| topic_facet |
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. |
| format |
Artigo |
| author |
Bernini, Rafael Berrelho |
| author2 |
Coutinho, Lúcia H. Nunez, C. V. Castilho, R. B. de Souza, Gerardo Gerson Bezerra de |
| author2Str |
Coutinho, Lúcia H. Nunez, C. V. Castilho, R. B. de Souza, Gerardo Gerson Bezerra de |
| title |
Ionic fragmentation of the isoprene molecule in the VUV energy range (12 to 310 eV) |
| 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) |
| publisher |
Journal of Electron Spectroscopy and Related Phenomena |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/15894 |
| _version_ |
1787143548202647552 |
| score |
11.755432 |