高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 244.

• Chemistry in Materials Sciences • 上一篇    下一篇

C80(Ⅰ,Ⅱ) and Sc2@C80(Ⅰ-Ⅲ):Production, Isolation and Spectrometric Studies

WANG Chun-Ru1,3, SHINOHARA Hisanori2, DUNSCH Lothar1, ZHENG Lan-Sun3   

  1. 1. IFW e. V. Institute of Solid State Research, Helmoheltzstr. 20, Dresden 01069, Germany;
    2. Department of Chemistry, Nagoya University, Nagoya 464, Japan;
    3. State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005
  • 出版日期:2000-12-31 发布日期:2000-12-31

C80(Ⅰ,Ⅱ) and Sc2@C80(Ⅰ-Ⅲ):Production, Isolation and Spectrometric Studies

WANG Chun-Ru1,3, SHINOHARA Hisanori2, DUNSCH Lothar1, ZHENG Lan-Sun3   

  1. 1. IFW e. V. Institute of Solid State Research, Helmoheltzstr. 20, Dresden 01069, Germany;
    2. Department of Chemistry, Nagoya University, Nagoya 464, Japan;
    3. State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005
  • Online:2000-12-31 Published:2000-12-31

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摘要：

C80 has seven structural isomers satisfying the isolated pentagon rule (IPR)[1],however,only one isomer of C80(D2) was isolated and studied so far[2]. In this study, we report the first successful isolation of multi-isomers of C80 and C80-based endohedral metallofullerenes. The new species were characterized by UV-Vis-NIR absorption spectroscopy, soot-extraction method, chromatographic retention time data and 13C NMR spectrometry (for C80(Ⅱ)). It is suggested that C80(Ⅱ) has a D5d symmetry by the 13C NMR pattern (3×20; 2×10) and its long retention time in 5PYE column. For the three isomers of Sc2@C80,isomer Ⅲ has an extremely long retention time which suggests a D5d symmetry. On the contrary, isomer I has a very short retention time in 5PYE columnso it may have the most spherical Ih symmetry. Theoretically, Sc2@C80(Ih) is expected to have novel super-conductivity property as the A3C60 (A=K, Rb).

Abstract:

C80 has seven structural isomers satisfying the isolated pentagon rule (IPR)[1],however,only one isomer of C80(D2) was isolated and studied so far[2]. In this study, we report the first successful isolation of multi-isomers of C80 and C80-based endohedral metallofullerenes. The new species were characterized by UV-Vis-NIR absorption spectroscopy, soot-extraction method, chromatographic retention time data and 13C NMR spectrometry (for C80(Ⅱ)). It is suggested that C80(Ⅱ) has a D5d symmetry by the 13C NMR pattern (3×20; 2×10) and its long retention time in 5PYE column. For the three isomers of Sc2@C80,isomer Ⅲ has an extremely long retention time which suggests a D5d symmetry. On the contrary, isomer I has a very short retention time in 5PYE columnso it may have the most spherical Ih symmetry. Theoretically, Sc2@C80(Ih) is expected to have novel super-conductivity property as the A3C60 (A=K, Rb).

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