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Direct proof of electron transfer in a rigid first generation triphenyl amine core dendrimer substituted with a peryleneimide acceptor

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Abstract

The combination of nanosecond transient absorption experiments and single photon timing experiments proved the occurrence of an electron transfer process in the triphenyl amine core dendrimer, N1P1, by demonstrating the presence of an ion-pair absorption for N1P1 in solvents of medium polarity. By means of femtosecond transient absorption measurements the rise time of this ion-pair absorption dominated by the radical anion absorption could be determined, resulting in a value of 180 ps in MeTHF and 138 ps in THF. Furthermore, in femtosecond fluorescence upconversion as well as in monochromatic femtosecond transient absorption, a few ps component was resolved which was assigned to a vibrational and solvent relaxation process of the locally excited singlet state of the peryleneimide.

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Authors and Affiliations

  1. Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001, Heverlee, Belgium

    M. Lor, S. Jordens, G. De Belder, G. Schweitzer, E. Fron, L. Viaene, M. Cotlet, J. W. Verhoeven, M. Van der Auweraer & F. C. De Schryver

  2. Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128, Mainz, Germany

    T. Weil & K. Müllen

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Dedicated to the memory of Nobel Laureate, Lord George Porter FRSC FRS OM.

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Lor, M., Jordens, S., De Belder, G. et al. Direct proof of electron transfer in a rigid first generation triphenyl amine core dendrimer substituted with a peryleneimide acceptor. Photochem Photobiol Sci 2, 501–510 (2003). https://doi.org/10.1039/b212450e

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