Synthesis and Characterization of Quarteranthene: Elucidating the Characteristics of the Edge State of Graphene Nanoribbons at the Molecular Level
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- 作者：Akihito Konishi ; Yasukazu Hirao ; Kouzou Matsumoto ; Hiroyuki Kurata ; Ryohei Kishi ; Yasuteru Shigeta ; Masayoshi Nakano ; Kazuya Tokunaga ; Kenji Kamada ; Takashi Kubo
- 刊名：The Journal of the American Chemical Society
- 出版年：2013
- 出版时间：January 30, 2013
- 年：2013
- 卷：135
- 期：4
- 页码：1430-1437
- 全文大小：459K
- 年卷期：v.135,no.4(January 30, 2013)
- ISSN：1520-5126
文摘
The characteristics of the edge state, which is a peculiar magnetic state in zigzag-edged graphene nanoribbons (ZGNRs) that originates from electron鈥揺lectron correlation in an edge-localized 蟺-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.