title: Direct Observation of Excimer-Mediated Intramolecular Electron Transfer in a Cofacially-Stacked Perylene Bisimide Pair.
abstract: We have elucidated excimer-mediated intramolecular electron transfer in cofacially stacked PBIs tethered by two phenylene-butadiynylene loops. The electron transfer between energetically equivalent PBIs is revealed by the simultaneous observation of the PBI radical anion and cation bands in the transient absorption spectra. The fluorescence decay time of the excimer states is in good agreement with the rise time of PBI radical bands in transient absorption spectra suggesting that the electron transfer dynamics proceed via the excimer state. We can conclude that the excimer state effectuates the efficient charge transfer in the cofacially stacked PBI dimer.
authors.affiliation: Department of Chemistry, Yonsei University , Seoul 120-749, Korea.
authors.forename: Jooyoung
authors.initials: J
authors.lastname: Sung
authors.affiliation: Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Nowak-Król
authors.affiliation: Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Schlosser
authors.affiliation: Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Fimmel
authors.affiliation: Department of Chemistry, Yonsei University , Seoul 120-749, Korea.
authors.forename: Woojae
authors.initials: W
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Yonsei University , Seoul 120-749, Korea.
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.affiliation: Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Würthner