A1 Journal article (refereed)
Photoinduced Electron Transfer in a Porphyrin-Fullerene Dyad at a Liquid Interface (2022)
Sissaoui, J., Efimov, A., Kumpulainen, T., & Vauthey, E. (2022). Photoinduced Electron Transfer in a Porphyrin-Fullerene Dyad at a Liquid Interface. Journal of Physical Chemistry B, 126(25), 4723-4730. https://doi.org/10.1021/acs.jpcb.2c02405
JYU authors or editors
Publication details
All authors or editors: Sissaoui, Jihad; Efimov, Alexander; Kumpulainen, Tatu; Vauthey, Eric
Journal or series: Journal of Physical Chemistry B
ISSN: 1520-6106
eISSN: 1520-5207
Publication year: 2022
Publication date: 21/06/2022
Volume: 126
Issue number: 25
Pages range: 4723-4730
Publisher: American Chemical Society (ACS)
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1021/acs.jpcb.2c02405
Publication open access: Not open
Publication channel open access: Channel is not openly available
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/83645
Abstract
The excited-state properties of an amphiphilic porphyrin–fullerene dyad and of its porphyrin analogue adsorbed at the dodecane/water interface are investigated by using surface second-harmonic generation. Although the porphyrin is formally centrosymmetric, the second-harmonic spectra of both compounds are dominated by the intense Soret band of the porphyrin. Polarization-selective measurements and molecular dynamics simulations suggest an angle of about 45° between the donor–acceptor axis and the interfacial plane, with the porphyrin interacting mostly with the nonpolar phase. Time-resolved measurements reveal a marked concentration dependence of the dynamics of both compounds upon Q-band excitation, indicating the occurrence of intermolecular quenching processes. The significant differences in dynamics and spectra between the dyad and the porphyrin analogue are explained by a self-quenching of the excited dyad via an intermolecular electron transfer.
Keywords: molecules; molecular dynamics; electrons; phases (chemistry); photochemistry; spectroscopy
Free keywords: interfaces; molecules; polarization; probes; pyrroles
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2022
JUFO rating: 1