浙江大学郭庆辉团队报道了环辛四烯嵌入的碳纳米环。相关研究成果于2024年3月29日发表于国际一流学术期刊《德国应用化学》。

随着碳纳米环的蓬勃发展，在过去的十年里，嵌入碳纳米环的某些拓扑或功能独特的单元如雨后春笋般出现。

该文中，研究人员报道了在一锅Yamamoto偶联中，简单有效地合成三个环辛四烯嵌入的碳纳米环（COTCNRs），其包含三个（COTCNR1和COTCNR2）和四个（COTCN R3）COT单元。这些纳米环具有陀螺（G-）、金刚石（D-）和原始（P-）型碳Schwarzite的环状片段。

三聚体纳米环COTCNR1和COTCNR2的构象是形状持久的，而四聚体COTCNR3具有柔性碳骨架，其在与富勒烯（C60和C70）形成主客体复合物时发生构象变化，富勒烯的共晶体可能作为富勒烯基半导体超分子线，在环境条件下电导率约为107S cm^-1（对于C60COTCNR3）和108S cm^-1。

该项研究不仅描述了三个环辛四烯嵌入碳纳米环的高效一步合成，这些环辛四环具有独特拓扑碳Schwarzite的环状链段，还展示了由COTCNR3固定的一维富勒烯阵列在电子领域的潜在应用。

附：英文原文

Title: Cyclooctatetraene-Embedded Carbon Nanorings

Author: Sheng-Nan Lei, Ling Zhu, Ning Xue, Xuedong Xiao, Le Shi, Duan-Chao Wang, Zhe Liu, Xin-Ru Guan, Yuan Xie, Ke Liu, Lian-Rui Hu, Zhao-Hui Wang, J. Fraser Stoddart, Qing-Hui Guo

Issue&Volume: 2024-03-29

Abstract: With the prosperity of the development of carbon nanorings, certain topologically or functionally unique units-embedded carbon nanorings have sprung up in the past decade. Herein, we report the facile and efficient synthesis of three cyclooctatetraene-embedded carbon nanorings (COTCNRs) that contain three (COTCNR1 and COTCNR2) and four (COTCNR3) COT units in a one-pot Yamamoto coupling. These nano rings feature hoop-shaped segments of Gyroid (G-), Diamond (D-), and Primitive (P-) type carbon schwarzites. The conformations of the trimeric nano rings COTCNR1 and COTCNR2 are shape-persistent, whereas the tetrameric COTCNR3 possesses a flexible carbon skeleton which undergoes conformational changes upon forming host-guest complexes with fullerenes (C60 and C70), whose co-crystals may potentially serve as fullerene-based semiconducting supramolecular wires with the electrical conductivities on the order of 107 S cm1 (for C60COTCNR3) and 108 S cm1 (for C70COTCNR3) under ambient conditions. This research not only describes highly efficient one-step syntheses to three cyclooctatetraene-embedded carbon nanorings which feature hoop-shaped segments of distinctive topological carbon schwarzites, but also demonstrates the potential application of the one dimensional fullerenes array secured by COTCNR3 in electronics.

DOI: 10.1002/anie.202402255

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202402255