Investigation of resonance-stabilized radicals associated with soot particle inception using advanced electron paramagnetic resonance techniques.
Journal
Communications chemistry
ISSN: 2399-3669
Titre abrégé: Commun Chem
Pays: England
ID NLM: 101725670
Informations de publication
Date de publication:
24 May 2023
24 May 2023
Historique:
received:
14
02
2023
accepted:
05
05
2023
medline:
25
5
2023
pubmed:
25
5
2023
entrez:
24
5
2023
Statut:
epublish
Résumé
In order to tackle the climate emergency, it is imperative to advance cleaner technologies to reduce pollutant emission as soot particles. However, there is still a lack of complete understanding of the mechanisms responsible for their formation. In this work, we performed an investigation devoted to the study of persistent radicals potentially involved in the formation of soot particles, by continuous wave and pulsed electron paramagnetic resonance. This work provides experimental evidence of the presence in nascent soot of highly branched, resonance-stabilized aromatic radicals bearing aliphatic groups, linked together by short carbon chains, and reinforced by non-covalent π-π interactions. These radicals appear to be highly specific of nascent soot and quickly disappear with the increasing soot maturity. Their presence in nascent soot could represent an underestimated health risk factor in addition to the already well documented effect of the high specific surface and the presence of harmful adsorbates.
Identifiants
pubmed: 37225916
doi: 10.1038/s42004-023-00896-4
pii: 10.1038/s42004-023-00896-4
pmc: PMC10209094
doi:
Types de publication
Journal Article
Langues
eng
Pagination
99Informations de copyright
© 2023. The Author(s).
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