title: Synthesis and characterization of quarteranthene: elucidating the characteristics of the edge state of graphene nanoribbons at the molecular level.
abstract: The characteristics of the edge state, which is a peculiar magnetic state in zigzag-edged graphene nanoribbons (ZGNRs) that originates from electron-electron correlation in an edge-localized π-state, are investigated by preparing and characterizing quarteranthene molecules. The molecular geometry that was determined from the X-ray analysis is consistent with a zigzag-edge-localized structure of unpaired electrons. The localized electrons are responsible for the peculiar magnetic (room-temperature ferromagnetic correlation), optical (the lowest-lying doubly excited state), and chemical (peroxide bond formation) behaviors. On the basis of these distinguishing properties and a careful consideration of the valence bonding, insight into the edge state of ZGNRs can be gained.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Akihito
authors.initials: A
authors.lastname: Konishi
authors.forename: Yasukazu
authors.initials: Y
authors.lastname: Hirao
authors.forename: Kouzou
authors.initials: K
authors.lastname: Matsumoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kurata
authors.forename: Ryohei
authors.initials: R
authors.lastname: Kishi
authors.forename: Yasuteru
authors.initials: Y
authors.lastname: Shigeta
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Nakano
authors.forename: Kazuya
authors.initials: K
authors.lastname: Tokunaga
authors.forename: Kenji
authors.initials: K
authors.lastname: Kamada
authors.forename: Takashi
authors.initials: T
authors.lastname: Kubo