Designing Cascades of Electron Transfer Processes in Multicomponent Graphene Conjugates

Limosani F, Kaur R, Cataldo A, Bellucci S, Micciulla F, Zanoni R, Lembo A, Wang B, Pizzoferrato R, Guldi DM, Tagliatesta P (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Angewandte Chemie International Edition Wiley

DOI: 10.1002/anie.202008820

Abstract

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.

Authors with CRIS profile

Ramandeep Kaur Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Bingzhe Wang Lehrstuhl für Physikalische Chemie I Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Involved external institutions

Università degli Studi di Roma 'Tor Vergata' IT Italy (IT) National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) IT Italy (IT) Università degli studi "La Sapienza" IT Italy (IT) IRBM S.p.A. IT Italy (IT) Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) IT Italy (IT) Università Politecnica delle Marche (UNIVPM) / Marche Polytechnic University IT Italy (IT)

How to cite

APA:

Limosani, F., Kaur, R., Cataldo, A., Bellucci, S., Micciulla, F., Zanoni, R.,... Tagliatesta, P. (2020). Designing Cascades of Electron Transfer Processes in Multicomponent Graphene Conjugates. Angewandte Chemie International Edition. https://dx.doi.org/10.1002/anie.202008820

MLA:

Limosani, Francesca, et al. "Designing Cascades of Electron Transfer Processes in Multicomponent Graphene Conjugates." Angewandte Chemie International Edition (2020).

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