title: Unravelling the conformations of di-(perylene bisimide acrylate) by combining time-resolved fluorescence-anisotropy experiments and molecular modelling.
abstract: We compare the results from time-resolved fluorescence anisotropy experiments and molecular modelling on perylene bisimide acrylate dimers which allows us to connect the observed spectral signatures unambiguously with the non-stacked and two (parallel and anti-parallel) stacked conformations. For the parallel stacked conformation the experimental data can be reproduced quantitatively using a model that assumes structural relaxation in the electronically excited state of the stacked aggregate. For the non-stacked conformation we find quantitative agreement between experiment and modelling only if a fast hopping of the electronic excitation between the perylene bisimide subunits is taken into account.
authors.affiliation: Experimental Physics IV and BIMF, University of Bayreuth, D-95440 Bayreuth, Germany. juergen.koehler@uni-bayreuth.de.
authors.forename: F
authors.initials: F
authors.lastname: Spreitler
authors.forename: M
authors.initials: M
authors.lastname: Sommer
authors.forename: M
authors.initials: M
authors.lastname: Hollfelder
authors.forename: M
authors.initials: M
authors.lastname: Thelakkat
authors.forename: S
authors.initials: S
authors.lastname: Gekle
authors.forename: J
authors.initials: J
authors.lastname: Köhler