Chen Qiang, Lodi Alessandro, Zhang Heng, Gee Alex, Wang Hai I, Kong Fanmiao, Clarke Michael, Edmondson Matthew, Hart Jack, O'Shea James N, Stawski Wojciech, Baugh Jonathan, Narita Akimitsu, Saywell Alex, Bonn Mischa, Müllen Klaus, Bogani Lapo, Anderson Harry L
Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford, UK.
Max Planck Institute for Polymer Research, Mainz, Germany.
Nat Chem. 2024 Jul;16(7):1133-1140. doi: 10.1038/s41557-024-01477-1. Epub 2024 Mar 8.
Graphene nanoribbons (GNRs), nanometre-wide strips of graphene, are promising materials for fabricating electronic devices. Many GNRs have been reported, yet no scalable strategies are known for synthesizing GNRs with metal atoms and heteroaromatic units at precisely defined positions in the conjugated backbone, which would be valuable for tuning their optical, electronic and magnetic properties. Here we report the solution-phase synthesis of a porphyrin-fused graphene nanoribbon (PGNR). This PGNR has metalloporphyrins fused into a twisted fjord-edged GNR backbone; it consists of long chains (>100 nm), with a narrow optical bandgap (~1.0 eV) and high local charge mobility (>400 cm V s by terahertz spectroscopy). We use this PGNR to fabricate ambipolar field-effect transistors with appealing switching behaviour, and single-electron transistors displaying multiple Coulomb diamonds. These results open an avenue to π-extended nanostructures with engineerable electrical and magnetic properties by transposing the coordination chemistry of porphyrins into graphene nanoribbons.
石墨烯纳米带（GNRs）是纳米宽度的石墨烯条带，是制造电子器件的有前途的材料。已经报道了许多GNRs，但目前还不知道有可扩展的策略来合成在共轭主链中精确定义位置含有金属原子和杂芳环单元的GNRs，而这对于调节它们的光学、电子和磁性将是有价值的。在这里，我们报道了一种卟啉融合的石墨烯纳米带（PGNR）的溶液相合成。这种PGNR具有融合到扭曲的峡湾边缘GNR主链中的金属卟啉；它由长链（>100nm）组成，具有窄的光学带隙（~1.0eV）和高的局部电荷迁移率（通过太赫兹光谱法测定>400cm V s）。我们使用这种PGNR制造具有吸引人的开关行为的双极场效应晶体管，以及显示多个库仑菱形的单电子晶体管。这些结果通过将卟啉的配位化学转移到石墨烯纳米带中，为具有可工程化电学和磁学性质的π扩展纳米结构开辟了一条途径。
