U.S. Department of Energy Office of Scientific and Technical Information
Synthesis and Isolation of the Titanium-Scandium Endohedral Fullerenes-Sc 2 TiC@ Ih -C 80 , Sc 2 TiC@ D5h -C 80 and Sc 2 TiC 2 @ Ih -C 80 : Metal Size Tuning of the Ti IV /Ti III Redox Potentials
The formation of endohedral metallofullerenes (EMFs) in an electric arc is reported for the mixed-metal Sc–Ti system utilizing methane as a reactive gas. Comparison of these results with those from the Sc/CH4 and Ti/CH4 systems as well as syntheses without methane revealed a strong mutual influence of all key components on the product distribution. Whereas a methane atmosphere alone suppresses the formation of empty cage fullerenes, the Ti/CH4 system forms mainly empty cage fullerenes. In contrast, the main fullerene products in the Sc/CH4 system are Sc4C2@C80 (the most abundant EMF from this synthesis), Sc3C2@C80, isomers of Sc2C2@C82, and the family Sc2C2n (2 n=74, 76, 82, 86, 90, etc.), as well as Sc3CH@C80. The Sc–Ti/CH4 system produces the mixed-metal Sc2TiC@C2n (2 n=68, 78, 80) and Sc2TiC2@C2n (2 n=80) clusterfullerene families. The molecular structures of the new, transition-metal-containing endohedral fullerenes, Sc2TiC@Ih-C80, Sc2TiC@D5h-C80, and Sc2TiC2@Ih-C80, were characterized by NMR spectroscopy. The structure of Sc2TiC@Ih-C80
Junghans, Katrin, Ghiassi, Kamran B., Samoylova, Nataliya A., Deng, Qingming, Rosenkranz, Marco, Olmstead, Marilyn M., Balch, Alan L., & Popov, Alexey A. (2016). Synthesis and Isolation of the Titanium-Scandium Endohedral Fullerenes-Sc <sub>2</sub> TiC@ <i>I<sub>h</sub></i> -C <sub>80</sub> , Sc <sub>2</sub> TiC@ <i>D</i> <sub>5<i>h</i></sub> -C <sub>80</sub> and Sc <sub>2</sub> TiC <sub>2</sub> @ <i>I<sub>h</sub></i> -C <sub>80</sub> : Metal Size Tuning of the Ti <sup>IV</sup> /Ti <sup>III</sup> Redox Potentials. Chemistry - A European Journal, 22(37). https://doi.org/10.1002/chem.201601655
@article{osti_1623509,
author = {Junghans, Katrin and Ghiassi, Kamran B. and Samoylova, Nataliya A. and Deng, Qingming and Rosenkranz, Marco and Olmstead, Marilyn M. and Balch, Alan L. and Popov, Alexey A.},
title = {Synthesis and Isolation of the Titanium-Scandium Endohedral Fullerenes-Sc <sub>2</sub> TiC@ <i>I<sub>h</sub></i> -C <sub>80</sub> , Sc <sub>2</sub> TiC@ <i>D</i> <sub>5<i>h</i></sub> -C <sub>80</sub> and Sc <sub>2</sub> TiC <sub>2</sub> @ <i>I<sub>h</sub></i> -C <sub>80</sub> : Metal Size Tuning of the Ti <sup>IV</sup> /Ti <sup>III</sup> Redox Potentials},
annote = {The formation of endohedral metallofullerenes (EMFs) in an electric arc is reported for the mixed-metal Sc–Ti system utilizing methane as a reactive gas. Comparison of these results with those from the Sc/CH4 and Ti/CH4 systems as well as syntheses without methane revealed a strong mutual influence of all key components on the product distribution. Whereas a methane atmosphere alone suppresses the formation of empty cage fullerenes, the Ti/CH4 system forms mainly empty cage fullerenes. In contrast, the main fullerene products in the Sc/CH4 system are Sc4C2@C80 (the most abundant EMF from this synthesis), Sc3C2@C80, isomers of Sc2C2@C82, and the family Sc2C2n (2 n=74, 76, 82, 86, 90, etc.), as well as Sc3CH@C80. The Sc–Ti/CH4 system produces the mixed-metal Sc2TiC@C2n (2 n=68, 78, 80) and Sc2TiC2@C2n (2 n=80) clusterfullerene families. The molecular structures of the new, transition-metal-containing endohedral fullerenes, Sc2TiC@Ih-C80, Sc2TiC@D5h-C80, and Sc2TiC2@Ih-C80, were characterized by NMR spectroscopy. The structure of Sc2TiC@Ih-C80},
doi = {10.1002/chem.201601655},
url = {https://www.osti.gov/biblio/1623509},
journal = {Chemistry - A European Journal},
issn = {ISSN 0947-6539},
number = {37},
volume = {22},
place = {United States},
publisher = {ChemPubSoc Europe},
year = {2016},
month = {07}}