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Electron and energy transfer in a porphyrin–oxoporphyrinogen–fullerene triad, ZnP–OxP–C60

Chahal, Mandeep Kaur, Gobeze, Habtom B., Webre, Whitney A., Karr, Paul A., Payne, Daniel T., Ariga, Katsuhiko, D'Souza, Francis, Hill, Jonathan P. (2020) Electron and energy transfer in a porphyrin–oxoporphyrinogen–fullerene triad, ZnP–OxP–C60. Physical Chemistry Chemical Physics, 22 . pp. 14356-14363. ISSN 1463-9084. E-ISSN 1463-9084. (doi:10.1039/D0CP02696D) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:103842)

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A multichromophoric triad, ZnP–OxP–C60 containing porphyrin (ZnTPP hereafter ZnP), oxoporphyrinogen (OxP) and fullerene (C60) has been synthesized to probe the intramolecular dynamics of its electron and energy transfer in relation to the presence of the closely linked electron deficient OxP–C60 ‘special pair’, constructed as a mimic of the naturally occurring photosynthetic antenna-reaction center. The DFT optimized structure of the triad reveals the relative spatial remoteness of the ZnP entity with proximal OxP/C60 entities. Free-energetics of different energy and electron transfer events were estimated using spectral, computational and electrochemical studies, according to the Rehm–Weller approach. Femtosecond transient absorption spectral studies revealed energy transfer from 1ZnP* to OxP to yield ZnP–1OxP*–C60, and electron transfer to yield ZnP˙+–OxP–C60˙− and/or ZnP–OxP˙+–C60˙− charge seperated states. That is, the ZnP entity in the triad operates as both antenna and electron donor to generate relatively long-lived charge separated states thus mimicking the early photoevents of natural photosynthesis.

Item Type: Article
DOI/Identification number: 10.1039/D0CP02696D
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Chemistry and Forensics
Funders: National Science Foundation (
Depositing User: Mandeep Kaur Chahal
Date Deposited: 09 Nov 2023 13:58 UTC
Last Modified: 09 Jan 2024 00:52 UTC
Resource URI: (The current URI for this page, for reference purposes)

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Chahal, Mandeep Kaur.

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