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Tanuma, Y., Dunk, P., Maekawa, T. & Ewels, C. P. (2022) Chain Formation during Hydrogen Loss and Reconstruction in Carbon Nanobelts. Nanomaterials, 12 2073.
Added by: Richard Baschera (2022-07-07 13:31:11) Last edited by: Richard Baschera (2022-07-07 13:36:56) |
| Type de référence: Article DOI: 10.3390/nano12122073 Numéro d'identification (ISBN etc.): 2079-4991 Clé BibTeX: Tanuma2022 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, PMN Mots-clés: carbon chains, cyclic polymers, Fullerenes, hydrogen loss, nanobelts, polycyclic aromatic hydrocarbons (PAH) Créateurs: Dunk, Ewels, Maekawa, Tanuma Collection: Nanomaterials |
Consultations : 1/235
Indice de consultation : 7% Indice de popularité : 1.75% |
| Liens URLs https://www.mdpi.c ... 79-4991/12/12/2073 |
| Résumé |
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Using laser-induced vaporisation to evaporate and ionise a source of curved polyaromatic hydrocarbons (carbon nanobelts), we show collision impacts between species cause mass loss and the resultant ions are catalogued via mass-spectrometry. These data are interpreted via a series of “in-silico”-simulated systematic hydrogen-loss studies using density functional theory modelling, sequentially removing hydrogen atoms using thermodynamic stability as a selection for subsequent dehydrogenation. Initial hydrogen loss results in the formation of carbyne chains and pentagon-chains while the nanobelt rings are maintained, giving rise to new circular strained dehydrobenzoannulene species. The chains subsequently break, releasing CH and C2. Alternative routes towards the formation of closed-cages (fullerenes) are identified but shown to be less stable than chain formation, and are not observed experimentally. The results provide important information on collision degradation routes of curved molecular carbon species, and notably serve as a useful guide to high-energy impact conditions observed in some astrochemical environments.
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Number: 12 Publisher: Multidisciplinary Digital Publishing Institute
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