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 |
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| Authors: | Katrin Junghans Christin Schlesier Aram Kostanyan Nataliya A Samoylova Qingming Deng Marco Rosenkranz Sandra Schiemenz Dr Rasmus Westerström Prof?Dr Thomas Greber Prof?Dr Bernd Büchner Dr Alexey A Popov |
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| Institution: | 1. Leibniz Institute for Solid State and Materials Research, Helmholtzstrasse 20, 01069 Dresden (Germany);2. Physik‐Institut der Universit?t Zürich, 8057 Zürich (Switzerland);3. Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI (Switzerland) |
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| Abstract: | 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. |
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| Keywords: | acetylides carbides endohedral fullerenes lanthanides single‐molecule magnets |
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