Photoinduced Electron Transfer in a Zinc Phthalocyanine–Fullerene Conjugate Connected by a Long Flexible Spacer

Lederer M, Ince M, Victoria Martinez-Diaz M, Torres T, Guldi DM (2016)

Publication Type: Journal article

Publication year: 2016

Journal

ChemPlusChem Wiley

Book Volume: 81

Pages Range: 941-946

Journal Issue: 9

DOI: 10.1002/cplu.201600197

Abstract

A hexadodecyl-substituted zinc phthalocyanine covalently linked through a flexible spacer to a fullerene—ZnPc−C60—has been investigated regarding electron transfer from the photoexcited, electron-donating ZnPc to the electron-accepting C60. While ground-state interactions between electron donor and acceptor within ZnPc−C60 could not be detected via steady-state absorption spectroscopy, clear proof for excited-state interactions came from steady-state fluorescence spectroscopy. To this end, the fluorescence in ZnPc−C60 is strongly quenched with quantum yields in THF as low as 0.05. Insight into excited-state electron-transfer deactivation within ZnPc−C60 came from time-resolved femtosecond transient absorption spectroscopy. For example, upon exclusive excitation of the phthalocyanine within the ZnPc−C60 conjugate, a set of transients evolve featuring, on the one hand, the signature of the one-electron oxidized ZnPc radical cation and, on the other hand, of the one-electron reduced C60 radical anion. The analysis of the corresponding dynamics in chlorobenzene resulted in lifetimes for charge-separation and charge-recombination of 7.4 ps and 2.2 ns, respectively.

Authors with CRIS profile

Marcus Lederer Lehrstuhl für Physikalische Chemie I Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Involved external institutions

Universidad Autónoma de Madrid (UAM) ES Spain (ES)

How to cite

APA:

Lederer, M., Ince, M., Victoria Martinez-Diaz, M., Torres, T., & Guldi, D.M. (2016). Photoinduced Electron Transfer in a Zinc Phthalocyanine–Fullerene Conjugate Connected by a Long Flexible Spacer. ChemPlusChem, 81(9), 941-946. https://doi.org/10.1002/cplu.201600197

MLA:

Lederer, Marcus, et al. "Photoinduced Electron Transfer in a Zinc Phthalocyanine–Fullerene Conjugate Connected by a Long Flexible Spacer." ChemPlusChem 81.9 (2016): 941-946.

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