Femtosecond charge transfer dynamics in artificial donor/acceptor systems: Switching from adiabatic to nonadiabatic regimes by small structural changes

Fiebig, T.; Stock, Kai; Lochbrunner, Stefan und Riedle, Eberhard (September 2001): Femtosecond charge transfer dynamics in artificial donor/acceptor systems: Switching from adiabatic to nonadiabatic regimes by small structural changes. In: Chemical Physics Letters, Bd. 345, Nr. 1-2: S. 81-88

Abstract

The dynamics of intramolecular charge transfer (CT) in a family of conjugated aromatic electron donor/acceptor (D/ A) systems has been studied by femtosecond pump-probe spectroscopy. Although the compounds have very similar structures we observed vastly different CT dynamics, ranging from a few 100 fs to the nanosecond time range. These results show that specific modifications in the substitution scheme can lead to alterations of the relevant D/A orbitals and thus to drastic changes in the excited state electronic coupling. As a result the CT process switches from the ultrafast adiabatic to the slow nonadiabatic regime. (C) 2001 Elsevier Science B.V. All rights reserved.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0009-2614
• Sprache: Englisch