title: An Electrically Conductive Single-Component Donor-Acceptor-Donor Aggregate with Hydrogen-Bonding Lattice.
abstract: An electrically conductive D-A-D aggregate composed of a single component was first constructed by use of a protonated bimetal dithiolate (complex 1H2). The crystal structure of complex 1H2has one-dimensional (1-D) π-stacking columns where the D and A moieties are placed in a segregated-stacking manner. In addition, these segregated-stacking 1-D columns are stabilized by hydrogen bonds. The result of a theoretical band calculation suggests that a conduction pathway forms along these 1-D columns. The transport property of complex 1H2is semiconducting (Ea= 0.29 eV, ρrt= 9.1 × 104Ω cm) at ambient pressure; however, the resistivity becomes much lower upon applying high pressure up to 8.8 GPa (Ea= 0.13 eV, ρrt= 6.2 × 10 Ω cm at 8.8 GPa). The pressure dependence of structural and optical changes indicates that the enhancement of conductivity is attributed to not only an increase of π-π overlapping but also a unique pressure-induced intramolecular charge transfer from D to A moieties in this D-A-D aggregate.
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Mikihiro
authors.identifier: http://orcid.org/0000-0002-1386-847X
authors.initials: M
authors.lastname: Hayashi
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Kazuya
authors.initials: K
authors.lastname: Otsubo
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Maesato
authors.affiliation: Division of Chemistry, Institute of Liberal Education, Nihon University School of Medicine , Tokyo 173-8610, Japan.
authors.forename: Tokutaro
authors.initials: T
authors.lastname: Komatsu
authors.affiliation: Japan Synchrotron Radiation Research Institute (JASRI), SPring-8 , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.
authors.forename: Kunihisa
authors.initials: K
authors.lastname: Sugimoto
authors.affiliation: Department of Nanotechnology for Sustainable Energy, Graduate School of Science and Technology, Kansei Gakuin University , Gakuen, Sanda, Hyogo 669-1337, Japan.
authors.forename: Akihiko
authors.identifier: http://orcid.org/0000-0002-1319-388X
authors.initials: A
authors.lastname: Fujiwara
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitagawa