Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (8): 1929-1932.doi: 10.3866/PKU.WHXB201605092

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AWeak Intercage C―C Bond in a [C60]fullerene Dimer Studied by In situ Variable Temperature EPR Spectroscopy

Tian TAN1,Jia-Hui YANG1,Chun-Hua ZHU2,Guan-Wu WANG2,Jia-Fu CHEN2,Ji-Hu SU1,*()   

  1. 1 Hefei National Laboratory for Physical Science at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, P. R. China
    2 Hefei National Laboratory for Physical Science at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2016-03-22 Published:2016-07-29
  • Contact: Ji-Hu SU E-mail:sujihu@ustc.edu.cn
  • Supported by:
    The project was supported by the National Key Basic Research Program of China (973)(2013CB921802)

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Abstract:

This work studied the thermodynamic properties of a single intercage C―C bond in a [C60]fullerene dimer, (C60)2-[P(O)(OCH3)]2, previously synthesized by Wang et al. (Chem. Commun. 2011, 47, 6111). Data obtained from in situ variable temperature electron paramagnetic resonance (EPR) indicated a relatively low bond dissociation enthalpy (BDE) for this bond of 72.4 kJ ·mol-1 (17.3 kcal ·mol-1). This value is only approximately twice that of a typical hydrogen bond, or one fifth of the values determined for bonds in diamond or saturated hydrocarbons. The application of this pre-synthesized dimer to the formation of aligned fullerenes is discussed.

Key words: [C60]fullerene dimer, Singly intercage C―C bond, Thermodynamic property, Bond dissociation enthalpy, Electron paramagnetic resonance spectroscopy