Designing Cascades of Electron Transfer Processes in Multicomponent Graphene Conjugates.
graphene nanoplates
zinc-tetraphenylporphyrin
Journal
Angewandte Chemie (International ed. in English)
ISSN: 1521-3773
Titre abrégé: Angew Chem Int Ed Engl
Pays: Germany
ID NLM: 0370543
Informations de publication
Date de publication:
21 Dec 2020
21 Dec 2020
Historique:
received:
24
06
2020
pubmed:
5
9
2020
medline:
5
9
2020
entrez:
5
9
2020
Statut:
ppublish
Résumé
A novel family of nanocarbon-based materials was designed, synthesized, and probed within the context of charge-transfer cascades. We integrated electron-donating ferrocenes with light-harvesting/electron-donating (metallo)porphyrins and electron-accepting graphene nanoplates (GNP) into multicomponent conjugates. To control the rate of charge flow between the individual building blocks, we bridged them via oligo-p-phenyleneethynylenes of variable lengths by β-linkages and the Prato-Maggini reaction. With steady-state absorption, fluorescence, Raman, and XPS measurements we realized the basic physico-chemical characterization of the photo- and redox-active components and the multicomponent conjugates. Going beyond this, we performed transient absorption measurements and corroborated by single wavelength and target analyses that the selective (metallo)porphyrin photoexcitation triggers a cascade of charge transfer events, that is, charge separation, charge shift, and charge recombination, to enable the directed charge flow. The net result is a few nanosecond-lived charge-separated state featuring a GNP-delocalized electron and a one-electron oxidized ferrocenium.
Identifiants
pubmed: 32886436
doi: 10.1002/anie.202008820
pmc: PMC7756474
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
23706-23715Subventions
Organisme : Deutsche Forschungsgemeinschaft
ID : SFB 953
Informations de copyright
© 2020 The Authors. Published by Wiley-VCH GmbH.
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