高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (3): 439.

• 研究论文 • 上一篇    下一篇

金属富勒烯的质谱研究

郭锬, 邢俊鹏, 季怡萍, 刘志强, 刘淑莹, 封继康   

  1. 中国科学院长春应用化学研究所质谱实验室, 长春 130022, 吉林
  • 收稿日期:2000-03-13 出版日期:2001-03-24 发布日期:2001-03-24
  • 通讯作者: 刘淑莹(1943出生),女,研究员,博士生导师,从事金属富勒烯的合成及表征研究.E-mail:mslab@ns.ciac.jl.cn E-mail:mslab@ns.ciac.jl.cn
  • 基金资助:

    国家自然科学基金(批准号:29771030)资助

Mass Spectrometric Studies of Metallofullerene

GUO Tan, XING Jun-Peng, JI Yi-Ping, LIU Zhi-Qiang, LIU Shu-Ying, FENG Ji-Kang   

  1. Key Laboratory of Bioorganic Phosphorus Chemistry of Education Ministry, Department of Chemistry, School of Life Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2000-03-13 Online:2001-03-24 Published:2001-03-24

PDF (PC)

被引次数

10

摘要： 利用电弧放电法合成笼内金属富勒烯Gd@C82,Gd2@C80,Gd@C80实验结果表明,两步高温高压法(1,2,4-三甲基苯,吡啶)可有效地提取金属富勒烯Gd@C82.本文分别利用ESI-MS,REC-MS,MALDI-TOF-MS质谱技术研究了Gd@C82,Gd2@C80,Gd@C80和富勒烯Cn(n=60,70,82,84…)的气相负离子特性.结果表明,包入Gd3+后非极性的C82转变为极性的Gd@C82分子;金属离子Gd3+处于C823-笼中非中心的位置.

关键词: 两步高温高压法, Gd@C82, ESI-MS, HOMO-LUMO, 极性分子, 非中心位置

Abstract: The endrohel metallofullerene, Gd@C82, Gd@C80, Gd2@C80 were synthesized by using K-Hmethod. The technique of two-step of high pressure and high temperature extraction with 1,3,5 trimethylbenzene(first step) and pyridine(second step) has been successfully utilized to extract metallofullerene of Gd@C82. The gas-phase negative ions of fullerenes Cn(n=60, 70, 78, 82, 84…) and metallofullerene (Gd@C82 ) have been studied by the ESI-MS, REC-MSand MALDI-TOF-MS. The differences among the mass spectra of ESI-MS, REC-MSand MALDI-TOF MShave been observed and explained. In contrast to the empty fullerene C82, the metallofullerene Gd@C82 should have a larger HOMO-LUMOgap. Experimental results suggest that Gd@C82 is polarized and Gd 3+ located in the off center position of C82 cage after Gd 3+ is trapped into C82 cage.

Key words: Two-step method of high pressure and temperature extraction, Gd@C82 molecule, ESI-MS, HOMO-LUMO, Polar molecule, Off-center position

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