title: Electronic energy and electron transfer processes in photoexcited donor-acceptor dyad and triad molecular systems based on triphenylene and perylene diimide units.
abstract: We investigate the photophysical properties of organic donor-acceptor dyad and triad molecular systems based on triphenylene and perylene diimide units linked by a non-conjugated flexible bridge in solution using complementary optical spectroscopy techniques. When these molecules are diluted in dichloromethane solution, energy transfer from the triphenylene to the perylene diimide excited moieties is evidenced by time-resolved fluorescence measurements resulting in a quenching of the emission from the triphenylene moieties. Simultaneously, another quenching process that affects the emission from both donor and acceptor units is observed. Solution ultrafast transient absorption measurements provide evidence of photo-induced charge transfer from either the donor or the acceptor depending upon the excitation. Overall, the analysis of the detailed time-resolved spectroscopic measurements carried out in the dyad and triad systems as well as in the triphenylene and perylene diimide units alone provides useful information both to better understand the relations between energy and charge transfer processes with molecular structures, and for the design of future functional dyad and triad architectures based on donor and acceptor moieties for organic optoelectronic applications.
authors.affiliation: Department of Physics, CNRS-Ewha International Research Center, Ewha Womans University, Seoul 120-750, Korea.
authors.forename: K J
authors.initials: KJ
authors.lastname: Lee
authors.affiliation: Department of Physics, CNRS-Ewha International Research Center, Ewha Womans University, Seoul 120-750, Korea and Center for Length, Division of Physical Metrology, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon, 305-340, South Korea.
authors.forename: J H
authors.initials: JH
authors.lastname: Woo
authors.affiliation: Department of Physics, CNRS-Ewha International Research Center, Ewha Womans University, Seoul 120-750, Korea.
authors.forename: E
authors.initials: E
authors.lastname: Kim
authors.affiliation: Institut Parisien de Chimie Moléculaire, Chimie des Polymères, UMR CNRS 8232, Sorbonne Universités - Université Pierre and Marie Curie, 4 place Jussieu, Paris, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: Institut Parisien de Chimie Moléculaire, Chimie des Polymères, UMR CNRS 8232, Sorbonne Universités - Université Pierre and Marie Curie, 4 place Jussieu, Paris, France.
authors.forename: X
authors.initials: X
authors.lastname: Su
authors.affiliation: Institut Parisien de Chimie Moléculaire, Chimie des Polymères, UMR CNRS 8232, Sorbonne Universités - Université Pierre and Marie Curie, 4 place Jussieu, Paris, France and Advanced Materials Engineering and Modelling Group, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
authors.forename: L M
authors.initials: LM
authors.lastname: Mazur
authors.affiliation: Institut Parisien de Chimie Moléculaire, Chimie des Polymères, UMR CNRS 8232, Sorbonne Universités - Université Pierre and Marie Curie, 4 place Jussieu, Paris, France.
authors.forename: A-J
authors.initials: AJ
authors.lastname: Attias
authors.affiliation: Aix Marseille Université, CNRS, CINaM UMR 7325, Campus de Luminy, Case 913, 13288 Marseille, France. daleo@cinam.univ-mrs.fr.
authors.forename: F
authors.initials: F
authors.lastname: Fages
authors.affiliation: CNRS-IPCMS, Université de Strasbourg, 23 Rue du Loess, Strasbourg, France.
authors.forename: O
authors.initials: O
authors.lastname: Cregut
authors.affiliation: CNRS-IPCMS, Université de Strasbourg, 23 Rue du Loess, Strasbourg, France.
authors.forename: A
authors.initials: A
authors.lastname: Barsella
authors.affiliation: Institut Parisien de Chimie Moléculaire, Chimie des Polymères, UMR CNRS 8232, Sorbonne Universités - Université Pierre and Marie Curie, 4 place Jussieu, Paris, France.
authors.forename: F
authors.initials: F
authors.lastname: Mathevet
authors.affiliation: CNRS-IPCMS, Université de Strasbourg, 23 Rue du Loess, Strasbourg, France.
authors.forename: L
authors.initials: L
authors.lastname: Mager
authors.affiliation: Department of Physics, CNRS-Ewha International Research Center, Ewha Womans University, Seoul 120-750, Korea.
authors.forename: J W
authors.initials: JW
authors.lastname: Wu
authors.affiliation: Aix Marseille Université, CNRS, CINaM UMR 7325, Campus de Luminy, Case 913, 13288 Marseille, France. daleo@cinam.univ-mrs.fr.
authors.forename: A
authors.initials: A
authors.lastname: D'Aléo
authors.affiliation: Department of Physics, CNRS-Ewha International Research Center, Ewha Womans University, Seoul 120-750, Korea.
authors.forename: J-C
authors.initials: JC
authors.lastname: Ribierre