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A diuranium carbide cluster stabilized inside a C80 fullerene cage

Author

Listed:
  • Xingxing Zhang

    (Soochow University)

  • Wanlu Li

    (Tsinghua University)

  • Lai Feng

    (Soochow University)

  • Xin Chen

    (Tsinghua University)

  • Andreas Hansen

    (Universität Bonn)

  • Stefan Grimme

    (Universität Bonn)

  • Skye Fortier

    (University of Texas at El Paso)

  • Dumitru-Claudiu Sergentu

    (University at Buffalo, State University of New York)

  • Thomas J. Duignan

    (University at Buffalo, State University of New York)

  • Jochen Autschbach

    (University at Buffalo, State University of New York)

  • Shuao Wang

    (Soochow University)

  • Yaofeng Wang

    (Soochow University)

  • Giorgios Velkos

    (Nanoscale Chemistry, Leibniz Institute for Solid State and Materials Research)

  • Alexey A. Popov

    (Nanoscale Chemistry, Leibniz Institute for Solid State and Materials Research)

  • Nabi Aghdassi

    (Soochow University)

  • Steffen Duhm

    (Soochow University)

  • Xiaohong Li

    (Soochow University)

  • Jun Li

    (Tsinghua University)

  • Luis Echegoyen

    (Universität Bonn)

  • W. H. Eugen Schwarz

    (Tsinghua University
    Universität Siegen)

  • Ning Chen

    (Soochow University)

Abstract

Unsupported non-bridged uranium–carbon double bonds have long been sought after in actinide chemistry as fundamental synthetic targets in the study of actinide-ligand multiple bonding. Here we report that, utilizing Ih(7)-C80 fullerenes as nanocontainers, a diuranium carbide cluster, U=C=U, has been encapsulated and stabilized in the form of UCU@Ih(7)-C80. This endohedral fullerene was prepared utilizing the Krätschmer–Huffman arc discharge method, and was then co-crystallized with nickel(II) octaethylporphyrin (NiII-OEP) to produce UCU@Ih(7)-C80·[NiII-OEP] as single crystals. X-ray diffraction analysis reveals a cage-stabilized, carbide-bridged, bent UCU cluster with unexpectedly short uranium–carbon distances (2.03 Å) indicative of covalent U=C double-bond character. The quantum-chemical results suggest that both U atoms in the UCU unit have formal oxidation state of +5. The structural features of UCU@Ih(7)-C80 and the covalent nature of the U(f1)=C double bonds were further affirmed through various spectroscopic and theoretical analyses.

Suggested Citation

  • Xingxing Zhang & Wanlu Li & Lai Feng & Xin Chen & Andreas Hansen & Stefan Grimme & Skye Fortier & Dumitru-Claudiu Sergentu & Thomas J. Duignan & Jochen Autschbach & Shuao Wang & Yaofeng Wang & Giorgio, 2018. "A diuranium carbide cluster stabilized inside a C80 fullerene cage," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05210-8
    DOI: 10.1038/s41467-018-05210-8
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    Cited by:

    1. Qingyu Meng & Laura Abella & Yang-Rong Yao & Dumitru-Claudiu Sergentu & Wei Yang & Xinye Liu & Jiaxin Zhuang & Luis Echegoyen & Jochen Autschbach & Ning Chen, 2022. "A charged diatomic triple-bonded U≡N species trapped in C82 fullerene cages," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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