Amphiphilic Zinc Porphyrin Single-Walled Carbon Nanotube Hybrids: Efficient Formation and Excited State Charge Transfer Studies.

Autor: Menon A; Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander University of Erlangen-Nürnberg, Egerlandstrasse 3, 91058, Erlangen, Germany., Münich PW; Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander University of Erlangen-Nürnberg, Egerlandstrasse 3, 91058, Erlangen, Germany., Wagner P; ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, AIIM Faculty, University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia., Officer DL; ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, AIIM Faculty, University of Wollongong, Northfields Avenue, Wollongong, NSW, 2522, Australia., Guldi DM; Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander University of Erlangen-Nürnberg, Egerlandstrasse 3, 91058, Erlangen, Germany.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2021 Dec; Vol. 17 (48), pp. e2005648. Date of Electronic Publication: 2021 Jan 18.
DOI: 10.1002/smll.202005648
Abstrakt: Herein, the microscopic and spectroscopic characterization of a novel non-covalent electron donor-acceptor system, in which three different metalloporphyrins (1, 2, and 3) play the dual role of light harvester and electron donor with SWCNTs as electron acceptor, is described. To this end, microscopy, that is, atomic force microscopy (AFM) and transmission electron microscopy (TEM) corroborate the formation of 1-SWCNT, 2-SWCNT, and 3-SWCNT. Spectroscopy by means of Raman, fluorescence, and transient absorption spectroscopy confirmed efficient charge-transfer interaction from photoexcited metalloporphyrins to SWCNTs in the ground and excited state of 1-SWCNT, 2-SWCNT, and 3-SWCNT. The complementary use of spectroelectrochemical and transient absorption measurements substantiates the formation of one-electron oxidized metalloporphyrins after photoexcitation. Multiwavelength global analysis provides insights into the charge-separation and recombination processes in 1-SWCNT, 2-SWCNT, and 3-SWCNT upon photoexcitation. Notably, both the charge-separation and recombination dynamics are fastest in 2-SWCNT. Importantly, the strongest interactions in the steady-state experiments are associated with the fastest excited state decay in the time-resolved measurements.
(© 2021 The Authors. Small published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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