Photoinduced electron transfer in fullerenes containing donor-bridge-acceptor dyads

Dirk M. Guldi; Michele Maggini; Simonetta Mondini; Gianfranco Scorrano; Maurizio Prato

doi:10.1117/12.283756

1 November 1997 Photoinduced electron transfer in fullerenes containing donor-bridge-acceptor dyads

Dirk M. Guldi, Michele Maggini, Simonetta Mondini, Gianfranco Scorrano, Maurizio Prato

Proceedings Volume 3142, Fullerenes and Photonics IV; (1997) https://doi.org/10.1117/12.283756
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Excited states properties of supramolecular fullerene donor- bridge-acceptor dyads were studied under various conditions. The steady-state emission yields of C₆₀-Fc and Ru-C₆₀ dyads are noticeably quenched relative to ruthenium and fullerene model compounds, respectively. This indicates that intramolecular electron-energy transfer plays a predominant contribution in the deactivation of the photoexcited chromophores, e.g. the singlet excited state of the fullerene core and ruthenium excited MLCT state. Picosecond and nanosecond resolved photolysis show that the photoexcited C₆₀-Fc and Ru-C₆₀ dyads transform rapidly into charge separated states. Characteristic NIR absorption of the fullerene (pi) -radical anions were complimented by a detailed UV/vis analysis and confirm the existence of long-lived radical pairs. The structure, length, and nature of the bridging spacer separating the two reactive centers had a significant impact on the lifetime nd stabilization of the charge separated states.

Citation Download Citation

Dirk M. Guldi, Michele Maggini, Simonetta Mondini, Gianfranco Scorrano, and Maurizio Prato "Photoinduced electron transfer in fullerenes containing donor-bridge-acceptor dyads", Proc. SPIE 3142, Fullerenes and Photonics IV, (1 November 1997); https://doi.org/10.1117/12.283756

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