Methane as a Selectivity Booster in the Arc-Discharge Synthesis of Endohedral Fullerenes: Selective Synthesis of the Single-Molecule Magnet Dy2TiC@C80 and Its Congener Dy2TiC2@C80

The use of methane as a reactive gas dramatically increases the selectivity of the arc‐discharge synthesis of M‐Ti‐carbide clusterfullerenes (M=Y, Nd, Gd, Dy, Er, Lu). Optimization of the process parameters allows the synthesis of Dy2TiC@C80‐I and its facile isolation in a single chromatographic ste...

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Veröffentlicht in:Angewandte Chemie International Edition 2015-11, Vol.54 (45), p.13411-13415
Hauptverfasser: Junghans, Katrin, Schlesier, Christin, Kostanyan, Aram, Samoylova, Nataliya A., Deng, Qingming, Rosenkranz, Marco, Schiemenz, Sandra, Westerström, Rasmus, Greber, Thomas, Büchner, Bernd, Popov, Alexey A.
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Sprache:eng
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Zusammenfassung:The use of methane as a reactive gas dramatically increases the selectivity of the arc‐discharge synthesis of M‐Ti‐carbide clusterfullerenes (M=Y, Nd, Gd, Dy, Er, Lu). Optimization of the process parameters allows the synthesis of Dy2TiC@C80‐I and its facile isolation in a single chromatographic step. A new type of cluster with an endohedral acetylide unit, M2TiC2@C80, is discovered along with the second isomer of M2TiC@C80. Dy2TiC@C80‐(I,II) and Dy2TiC2@C80‐I are shown to be single‐molecule magnets (SMM), but the presence of the second carbon atom in the cluster Dy2TiC2@C80 leads to substantially poorer SMM properties. Carbide inclusion: The use of methane as a reactive gas dramatically increases the selectivity of the arc‐discharge synthesis of M2TiC@C80 carbide clusterfullerenes (M=lanthanide). The new single‐molecule magnet Dy2TiC@C80 could be readily isolated.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201505870