东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (5): 683-686.DOI: -

• 论著 • 上一篇    下一篇

金属富勒烯包合物M@C_(50)结构和稳定性的理论研究

王东来;顾惠敏;沈洪涛;翟玉春;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-05-15 发布日期:2013-06-24
  • 通讯作者: Wang, D.-L.
  • 作者简介:-
  • 基金资助:
    辽宁省教育厅高等学校科学研究资助项目(2024201057)

Theoretical study on structures and stabilities of endofullerenes M@C50

Wang, Dong-Lai (1); Gu, Hui-Min (1); Shen, Hong-Tao (1); Zhai, Yu-Chun (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-05-15 Published:2013-06-24
  • Contact: Wang, D.-L.
  • About author:-
  • Supported by:
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摘要: 在密度泛函B3LYP理论下,用LANL2DZ基组对具有D5h,D3对称性的两种C50富勒烯异构体及以它们为基形成的第二主族金属富勒烯包合物M@C50[M=Be,Mg,Ca,Sr,Ba]进行了几何构型优化和振动频率分析.得到了相应的优化几何参数、总能量、前线轨道能级差,同时还计算了分子中原子电荷和结合能.计算结果表明,对于内包金属原子类型M(除Be外)相同时,D5hM@C50包合物比相对应的D3M@C50包合物稳定;对于具有相同对称性而内包金属原子类型M不同的D5hM@C50,其稳定性随原子序数的增大而增大;从热力学或动力学角度分析,形成D5h对称性的Sr@C50,Ba@C50包合物都是可能的.

关键词: 密度泛函理论, 金属富勒烯, 异构体, 结合能, 稳定性

Abstract: Based on the B3LYP density functional theory, the LANL2DZ basis set was employed to study the equilibrium geometries and vibration frequencies of two kinds of the isomers C50 with D5h/D3, symmetry and the clathrate M@C50 [M = Be, Mg, Ca, Sr, Ba] as the 2nd main group formed with the isomers as radicals. The energy level difference of frontier molecular orbital, net atomic charge and binding energy were calculated. The results indicated that the endofullerenes D5h M@C50 are more stable than the D3M@C50. For the same symmetry D5h, the stabilities of different endofullerenes are in order of their atomic number from low to high. Thermodynamic factors are thus quite favorable for the formation of Sr@C50 and Ba@C50.

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