英国牛津大学Anderson, Harry L.团队报道了卟啉融合的石墨烯纳米带。相关研究成果发表在2024年3月8日出版的《自然—化学》。

石墨烯纳米带（GNRs）是一种纳米尺度宽的石墨烯带，是制造电子器件的有前途的材料。已经报道了许多GNRs，但还没有已知的可扩展策略来合成在共轭主链中精确定义的，位置具有金属原子和杂芳单元的GNRs，这对调节它们的光学、电子和磁性是有价值的。

该文报道了卟啉融合石墨烯纳米带（PGNR）的溶液相合成。这种PGNR具有融合到扭曲的峡湾边缘GNR骨架中的金属卟啉，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（通过太赫兹光谱测量，>400cm2V^–1s^–1）。研究人员使用这种PGNR来制造具有吸引力开关行为的双极场效应晶体管，以及显示多个库仑金刚石的单电子晶体管。

研究结果通过将卟啉的配位化学转化为石墨烯纳米带，为具有工程电学和磁学性质的π扩展纳米结构开辟了一条途径。

附：英文原文

Title: Porphyrin-fused graphene nanoribbons

Author: Chen, Qiang, Lodi, Alessandro, Zhang, Heng, Gee, Alex, Wang, Hai I., Kong, Fanmiao, Clarke, Michael, Edmondson, Matthew, Hart, Jack, OShea, James N., Stawski, Wojciech, Baugh, Jonathan, Narita, Akimitsu, Saywell, Alex, Bonn, Mischa, Mllen, Klaus, Bogani, Lapo, Anderson, Harry L.

Issue&Volume: 2024-03-08

Abstract: 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 (>100nm), with a narrow optical bandgap (~1.0eV) and high local charge mobility (>400cm2V–1s–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.

DOI: 10.1038/s41557-024-01477-1

Source: https://www.nature.com/articles/s41557-024-01477-1