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<p>Fullertubes and metallofullertubes, which are composed of nanotube segments and fullerene end-caps, are promising molecular carbon materials for advanced electronic devices. Herein, we report the synthesis and characterization of Dy<sub>2</sub>C<sub>2</sub>@<i>D</i><sub>5</sub>(450)-C<sub>100</sub>, a new metallofullertube that features single-molecule magnet behavior, high single-molecule conductance, and ordered molecular assembly. Dy<sub>2</sub>C<sub>2</sub>@<i>D</i><sub>5</sub>(450)-C<sub>100</sub> possesses a zigzag-shaped [10,0] nanotube segment in its middle, two fullerene hemispheres on both sides, as well as a Dy<sub>2</sub>C<sub>2</sub> cluster with kinked linear form within the cage. Owing to its encapsulation of two Dy<sup>3+</sup> ions, Dy<sub>2</sub>C<sub>2</sub>@<i>D</i><sub>5</sub>(450)-C<sub>100</sub> exhibits magnetic hysteresis loops at temperatures up to 5 K. More importantly, Dy<sub>2</sub>C<sub>2</sub>@<i>D</i><sub>5</sub>(450)-C<sub>100</sub> could form stable molecular junctions between Au electrodes as determined by the scanning tunneling microscopy-break junction technique. Specifically, Dy<sub>2</sub>C<sub>2</sub>@<i>D</i><sub>5</sub>(450)-C<sub>100</sub> displays binary single-molecule conductance states at 10<sup>−0.4</sup><i>G</i><sub>0</sub> and 10<sup>−1.2</sup><i>G</i><sub>0</sub>, corresponding to the configuration along its short and long axes, respectively. Furthermore, the ordered assembled structures of Dy<sub>2</sub>C<sub>2</sub>@<i>D</i><sub>5</sub>(450)-C<sub>100</sub> are characterized by TEM. These unique properties of Dy<sub>2</sub>C<sub>2</sub>@<i>D</i><sub>5</sub>(450)-C<sub>100</sub> indicate its potential applications as molecule-based magnetic semiconductor materials.</p>

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A metallofullertube of Dy2C2@C100 featuring single-molecule magnet behavior, binary single-molecule conductance states and ordered molecular assembly

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Wang Li,
  • Zitai Jiang,
  • Linshan Liu,
  • Haoran Sun,
  • Lin Wang,
  • Wei Liu,
  • Chunru Wang,
  • Taishan Wang

摘要

Fullertubes and metallofullertubes, which are composed of nanotube segments and fullerene end-caps, are promising molecular carbon materials for advanced electronic devices. Herein, we report the synthesis and characterization of Dy2C2@D5(450)-C100, a new metallofullertube that features single-molecule magnet behavior, high single-molecule conductance, and ordered molecular assembly. Dy2C2@D5(450)-C100 possesses a zigzag-shaped [10,0] nanotube segment in its middle, two fullerene hemispheres on both sides, as well as a Dy2C2 cluster with kinked linear form within the cage. Owing to its encapsulation of two Dy3+ ions, Dy2C2@D5(450)-C100 exhibits magnetic hysteresis loops at temperatures up to 5 K. More importantly, Dy2C2@D5(450)-C100 could form stable molecular junctions between Au electrodes as determined by the scanning tunneling microscopy-break junction technique. Specifically, Dy2C2@D5(450)-C100 displays binary single-molecule conductance states at 10−0.4G0 and 10−1.2G0, corresponding to the configuration along its short and long axes, respectively. Furthermore, the ordered assembled structures of Dy2C2@D5(450)-C100 are characterized by TEM. These unique properties of Dy2C2@D5(450)-C100 indicate its potential applications as molecule-based magnetic semiconductor materials.