Marangoni Tomas, Haberer Danny, Rizzo Daniel J, Cloke Ryan R, Fischer Felix R
Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA, 94720, U.S.A.
Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA, 94720, United States.
Chemistry. 2016 Sep 5;22(37):13037-40. doi: 10.1002/chem.201603497. Epub 2016 Aug 9.
Atomically precise engineering of defined segments within individual graphene nanoribbons (GNRs) represents a key enabling technology for the development of advanced functional device architectures. Here, the bottom-up synthesis of chevron GNRs decorated with reactive functional groups derived from 9-methyl-9H-carbazole is reported. Scanning tunneling and non-contact atomic force microscopy reveal that a thermal activation of GNRs induces the rearrangement of the electron-rich carbazole into an electron-deficient phenanthridine. The selective chemical edge-reconstruction of carbazole-substituted chevron GNRs represents a practical strategy for the controlled fabrication of spatially defined GNR heterostructures from a single molecular precursor.
对单个石墨烯纳米带（GNR）内特定片段进行原子精确工程是开发先进功能器件架构的一项关键使能技术。在此，报道了具有源自9-甲基-9H-咔唑的反应性功能基团修饰的人字形GNR的自下而上合成。扫描隧道显微镜和非接触原子力显微镜表明，GNR的热活化会诱导富电子的咔唑重排为缺电子的菲啶。咔唑取代的人字形GNR的选择性化学边缘重构是一种从单一分子前体可控制备空间定义的GNR异质结构的实用策略。
