title: Occurrence of photoinduced charge separation by the modulation of the electronic coupling between pyrene dimers and chemically converted graphenes.
abstract: The photoexcitation of the pyrene dimer on graphene resulted in the final formation of a charge-separated state following an exciplex formation, while that of the pyrene monomer on graphene generated the corresponding exciplex solely due to the difference in the electronic coupling between the pyrene and the graphene.
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan. umeyama@scl.kyoto-u.ac.jp imahori@scl.kyoto-u.ac.jp.
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Umeyama
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan. umeyama@scl.kyoto-u.ac.jp imahori@scl.kyoto-u.ac.jp.
authors.forename: Jinseok
authors.initials: J
authors.lastname: Baek
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan. umeyama@scl.kyoto-u.ac.jp imahori@scl.kyoto-u.ac.jp.
authors.forename: Junya
authors.initials: J
authors.lastname: Mihara
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FIN-33101 Tampere, Finland. nikolai.tkachenko@tut.fi.
authors.forename: Nikolai V
authors.initials: NV
authors.lastname: Tkachenko
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan. umeyama@scl.kyoto-u.ac.jp imahori@scl.kyoto-u.ac.jp and Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan.
authors.forename: Hiroshi
authors.identifier: http://orcid.org/0000-0003-3506-5608
authors.initials: H
authors.lastname: Imahori