Electron-ion coincidence spectroscopy of a large organic molecule : photofragmentation of avobenzone after valence and core ionisation
(2020) In Journal of Physics B: Atomic, Molecular and Optical Physics 53(24).- Abstract
The Avobenzone (AVOB) molecule is very photoactive and undergoes irreversible degradation upon irradiation. We studied its valence and core-level (C1s and O1s) photoionisation and subsequent photofragmentation with photoelectron spectroscopy and photoelectron-photoion-photoion coincidence (PEPIPICO) spectroscopy. AVOB is one of the largest molecules studied with this technique. The results show that the AVOB molecule dissociates into an extensive range of fragments by different pathways with little element or site-selectivity. The coincident maps were used to determine selected fragment separation sequences by analysing the slopes of patterns from ion pairs after the core ionisation. Charge delocalisation over the benzene rings and... (More)
The Avobenzone (AVOB) molecule is very photoactive and undergoes irreversible degradation upon irradiation. We studied its valence and core-level (C1s and O1s) photoionisation and subsequent photofragmentation with photoelectron spectroscopy and photoelectron-photoion-photoion coincidence (PEPIPICO) spectroscopy. AVOB is one of the largest molecules studied with this technique. The results show that the AVOB molecule dissociates into an extensive range of fragments by different pathways with little element or site-selectivity. The coincident maps were used to determine selected fragment separation sequences by analysing the slopes of patterns from ion pairs after the core ionisation. Charge delocalisation over the benzene rings and their relative stability favor fragmentation by cleavage of the bridge between them.
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- author
- Abid, Abdul Rahman ; Pelimanni, Eetu ; Reinhardt, Maximilian ; Boudjemia, Nacer ; Kivimaki, Antti LU ; Huttula, Marko ; Björneholm, Olle LU and Patanen, Minna
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- avobenzone, electron spectroscopy, PEPIPICO, photofragmentation, radiation damage, time-of-flight mass spectrometry
- in
- Journal of Physics B: Atomic, Molecular and Optical Physics
- volume
- 53
- issue
- 24
- article number
- 244001
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85096900774
- ISSN
- 0953-4075
- DOI
- 10.1088/1361-6455/abc228
- language
- English
- LU publication?
- yes
- id
- a81c079c-f46d-464c-a086-42b55f8fc9f2
- date added to LUP
- 2020-12-09 13:39:48
- date last changed
- 2022-04-26 22:26:18
@article{a81c079c-f46d-464c-a086-42b55f8fc9f2, abstract = {{<p>The Avobenzone (AVOB) molecule is very photoactive and undergoes irreversible degradation upon irradiation. We studied its valence and core-level (C1s and O1s) photoionisation and subsequent photofragmentation with photoelectron spectroscopy and photoelectron-photoion-photoion coincidence (PEPIPICO) spectroscopy. AVOB is one of the largest molecules studied with this technique. The results show that the AVOB molecule dissociates into an extensive range of fragments by different pathways with little element or site-selectivity. The coincident maps were used to determine selected fragment separation sequences by analysing the slopes of patterns from ion pairs after the core ionisation. Charge delocalisation over the benzene rings and their relative stability favor fragmentation by cleavage of the bridge between them.</p>}}, author = {{Abid, Abdul Rahman and Pelimanni, Eetu and Reinhardt, Maximilian and Boudjemia, Nacer and Kivimaki, Antti and Huttula, Marko and Björneholm, Olle and Patanen, Minna}}, issn = {{0953-4075}}, keywords = {{avobenzone; electron spectroscopy; PEPIPICO; photofragmentation; radiation damage; time-of-flight mass spectrometry}}, language = {{eng}}, number = {{24}}, publisher = {{IOP Publishing}}, series = {{Journal of Physics B: Atomic, Molecular and Optical Physics}}, title = {{Electron-ion coincidence spectroscopy of a large organic molecule : photofragmentation of avobenzone after valence and core ionisation}}, url = {{http://dx.doi.org/10.1088/1361-6455/abc228}}, doi = {{10.1088/1361-6455/abc228}}, volume = {{53}}, year = {{2020}}, }