Magnetic and structural anomalies of NanC60 (n = 2, 3)

• Authors: Vladimir Kulbachinskii , Boris Bulychev , Vladimir Kytin , Alexey Krechetov , Valeriy Tarasov , Elizaveta Konstantinova , Yuriy Velikodnyi , Yuriy Muravlev , Andrey Zoteev
• Languages of publication: EN

Abstracts

EN

Sodium fullerides NanC60 (n = 2, 3) have been synthesized by a liquid phase reaction and investigated with X-ray diffraction (XRD), nuclear magnetic resonance (NMR), electron paramagnetic resonance, and differential thermal analysis. XRD data indicate that the crystal structure of Na2C60 at 300 K is face centered cubic (FCC). A phase transition from primitive cubic to FCC crystal structure has been observed in this work in Na2C60 fulleride at 290 K. The transition is accompanied by the step-like change of paramagnetic susceptibility. The crystal structure of Na3C60 is more complicated than, and different from, what has been reported in the literature. A nearly seven-fold increase of paramagnetic susceptibility with increasing temperature has been observed in the Na3C60 fulleride at 240–260 K. In the same temperature range, a new line at about 255 ppm appears in the 23Na NMR spectrum, indicating a significant increase of electron density near the Na nucleus. The observed effect can be explained by a metal-insulator transition caused by a structural transition.

Keywords

EN

fullerenes; chemical synthesis; differential scanning calorimetry (DSC); nuclear magnetic resonance; electron paramagnetic resonance

Discipline

• 71.20.Tx: Fullerenes and related materials; intercalation compounds
• 74.10.+v: Occurrence, potential candidates

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2010
• Volume: 8
• Issue: 1
• Pages: 101-112

Dates

published

1 - 2 - 2010

online

15 - 11 - 2009

Contributors

author

Vladimir Kulbachinskii

• Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia

author

Boris Bulychev

• Department of Chemistry, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia

author

Vladimir Kytin

• Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia

author

Alexey Krechetov

• Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia

author

Valeriy Tarasov

• Institute of General and Inorganic Chemistry RAS, Moscow, Russia

author

Elizaveta Konstantinova

• Department of Chemistry, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia

author

Yuriy Velikodnyi

• Department of Chemistry, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia

author

Yuriy Muravlev

• Institute of General and Inorganic Chemistry RAS, Moscow, Russia

author

Andrey Zoteev

• Department of Physics, M. V. Lomonosov Moscow State University, GSP-1, 119991, Moscow, Russia

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Identifiers

DOI

10.2478/s11534-009-0081-1