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 editorsSissaoui, Jihad; Efimov, Alexander; Kumpulainen, Tatu; Vauthey, Eric

Journal or seriesJournal of Physical Chemistry B

ISSN1520-6106

eISSN1520-5207

Publication year2022

Publication date21/06/2022

Volume126

Issue number25

Pages range4723-4730

PublisherAmerican Chemical Society (ACS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1021/acs.jpcb.2c02405

Publication open accessNot open

Publication channel open accessChannel 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.


Keywordsmoleculesmolecular dynamicselectronsphases (chemistry)photochemistryspectroscopy

Free keywordsinterfaces; molecules; polarization; probes; pyrroles


Contributing organizations


Ministry reportingYes

Reporting Year2022

JUFO rating1


Last updated on 2024-25-03 at 10:51