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 cm² V^–1 s^–1 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（GNR）是纳米宽的石墨烯条，是用于制造电子设备的有前途的材料。许多 GNR 已被报道，但尚无可扩展的策略用于在共轭主链中精确定义的位置上合成具有金属原子和杂芳族单元的 GNR，这对于调节其光学、电子和磁性特性非常有价值。在这里，我们报告了卟啉熔融石墨烯纳米带（PGNR）的溶液相合成。该 PGNR 将金属卟啉融合到扭曲的峡湾边缘 GNR 主链中；它由长链（>100 nm）组成，具有窄光学带隙（~1.0 eV）和高局部电荷迁移率（太赫兹光谱测量>400 cm ²  V ^–1  s ^{–1 ）。}我们使用这种 PGNR 来制造具有吸引人的开关行为的双极场效应晶体管，以及显示多个库仑钻石的单电子晶体管。这些结果通过将卟啉的配位化学转移到石墨烯纳米带中，为具有可设计的电学和磁学性质的π延伸纳米结构开辟了道路。