Xiang Feifei, Gu Yanwei, Kinikar Amogh, Bassi Nicolò, Ortega-Guerrero Andres, Qiu Zijie, Gröning Oliver, Ruffieux Pascal, Pignedoli Carlo A, Müllen Klaus, Fasel Roman
nanotech@surfaces Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland.
Materials Tech Laboratory for Hydrogen and Energy Storage, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, P. R. China.
Nat Chem. 2025 Aug 21. doi: 10.1038/s41557-025-01887-9.
Graphene nanoribbons (GNRs) with zigzag edges are promising materials for spintronic devices due to tunable bandgaps and spin-polarized edge states. Porphyrins offer complementary benefits such as desirable optoelectronic properties. Here we combine these features in a hybrid system by means of the on-surface synthesis of zigzag-edge GNRs embedded with porphyrins laterally fused along the ribbon backbone. Using scanning probe methods, we show that this design achieves strong electronic coupling between the porphyrin and the GNR. For transition metal porphyrins, pronounced exchange coupling between distant metal centres is mediated by the π-electron system. Such a hybrid d and π electron ribbon system introduces spin-orbit coupling and magnetic anisotropy to carbon nanomaterials, and holds great promise for coherent electrical control of electron spins.
具有锯齿形边缘的石墨烯纳米带（GNRs）由于其可调节的带隙和自旋极化边缘态，是自旋电子器件的理想材料。卟啉具有互补的优点，如理想的光电特性。在这里，我们通过在表面合成沿带主干横向融合有卟啉的锯齿形边缘GNRs，将这些特性结合在一个混合系统中。使用扫描探针方法，我们表明这种设计实现了卟啉与GNR之间的强电子耦合。对于过渡金属卟啉，远处金属中心之间明显的交换耦合是由π电子系统介导的。这种混合的d和π电子带系统为碳纳米材料引入了自旋轨道耦合和磁各向异性，并在电子自旋的相干电控制方面具有巨大潜力。
