title: The role of the dipolar neighborhood on the relaxation dynamics of multichromophoric merocyanines.
abstract: The interactions between different chromophores within a molecular system are crucial to comprehend relaxation dynamics, regardless if one deals with small molecules or larger systems like polymers or aggregates. We investigate a series of merocyanine molecules that contain one, two or three highly dipolar (μg = 13.1 D) dyes in close vicinity to study the influence and origin of interactions, e.g., electronic, vibronic, or the formation of excitons. Relaxation dynamics are probed via transient absorption and coherent two-dimensional spectroscopy. Furthermore, we derive a general relaxation model which can be applied for all merocyanines under investigation and can be used as a reference point for other dipolar donor-acceptor dyes. The intramolecular charge-transfer state of the monomeric merocyanine is stabilized by dipolar neighbor molecules in the bis- and tris-chromophoric dyes.
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. brixner@phys-chemie.uni-wuerzburg.de.
authors.forename: Federico
authors.initials: F
authors.lastname: Koch
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. brixner@phys-chemie.uni-wuerzburg.de.
authors.forename: Andreas
authors.initials: A
authors.lastname: Steinbacher
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. brixner@phys-chemie.uni-wuerzburg.de and Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany.
authors.forename: Cristina
authors.initials: C
authors.lastname: Consani
authors.affiliation: Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. wuerthner@chemie.uni-wuerzburg.de.
authors.forename: André
authors.initials: A
authors.lastname: Zitzler-Kunkel
authors.affiliation: Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany and Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. wuerthner@chemie.uni-wuerzburg.de.
authors.forename: Matthias
authors.initials: M
authors.lastname: Stolte
authors.affiliation: Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany and Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. wuerthner@chemie.uni-wuerzburg.de.
authors.forename: Frank
authors.initials: F
authors.lastname: Würthner
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. brixner@phys-chemie.uni-wuerzburg.de and Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Brixner