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Methane as a Selectivity Booster in the Arc‐Discharge Synthesis of Endohedral Fullerenes: Selective Synthesis of the Single‐Molecule Magnet Dy 2 TiC@C 80 and Its Congener Dy 2 TiC 2 @C 80
Author(s) -
Junghans Katrin,
Schlesier Christin,
Kostanyan Aram,
Samoylova Nataliya A.,
Deng Qingming,
Rosenkranz Marco,
Schiemenz Sandra,
Westerström Rasmus,
Greber Thomas,
Büchner Bernd,
Popov Alexey A.
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201505870
Subject(s) - endohedral fullerene , selectivity , acetylide , methane , fullerene , carbide , molecule , cluster (spacecraft) , magnet , chemistry , atom (system on chip) , materials science , crystallography , stereochemistry , organic chemistry , physics , quantum mechanics , computer science , embedded system , programming language , catalysis
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 Dy 2 TiC@C 80 ‐I and its facile isolation in a single chromatographic step. A new type of cluster with an endohedral acetylide unit, M 2 TiC 2 @C 80 , is discovered along with the second isomer of M 2 TiC@C 80 . Dy 2 TiC@C 80 ‐(I,II) and Dy 2 TiC 2 @C 80 ‐I are shown to be single‐molecule magnets (SMM), but the presence of the second carbon atom in the cluster Dy 2 TiC 2 @C 80 leads to substantially poorer SMM properties.