Helical Trilayer Nanographenes with Tunable Interlayer Overlaps

作者：Yang‐Yang Ju, Ling Chai, Kang Li, Jiang‐Feng Xing, Xiao‐Hui Ma, Zhen‐Lin Qiu, Xin‐Jing Zhao, Jun Zhu, Yuan‐Zhi Tan · 发表于：Journal of the American Chemical Society · 年份：2023 · DOI：10.1021/jacs.2c08746 · 被引用次数：55 · 研究领域：Synthesis and Properties of Aromatic Compounds、Graphene research and applications、Supramolecular Self-Assembly in Materials

The synthesis of well-defined nanocarbon multilayers, beyond the bilayer structure, is still a challenging goal. Herein, two trilayer nanographenes were synthesized by covalently linking nanographene layers through helicene bridges. The structural characterization of the trilayer nanographenes revealed a compact trilayer-stacked architecture. The introduction of a furan ring into the helicene linker modulates the interlayer overlap and π-conjugation of the trilayer nanographenes, enabling the tuning of the interlayer coupling, as demonstrated by optical, electrochemical, and theoretical analyses. Both synthesized trilayer nanographenes are rigid chiral nanocarbons and show a chirality transfer from the helicene moiety to the stacked nanographene layers. These helical trilayer nanographenes reported here represent the covalently linked multilayer nanographenes rather than bilayer ones, showing the tunable multilayer stacking structure.