High-Yield Extraction of Endohedral Rare-Earth Fullerenes
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- 作者：Dayong Sun ; Ziyang Liu ; Xinghua Guo ; Wenguo Xu ; and Shuying Liu
- 刊名：Journal of Physical Chemistry B
- 出版年：1997
- 出版时间：May 15, 1997
- 年：1997
- 卷：101
- 期：20
- 页码：3927 - 3930
- 全文大小：124K
- 年卷期：v.101,no.20(May 15, 1997)
- ISSN：1520-5207
文摘
The technique of high-temperature high-pressure extraction withpyridine has been successfully utilized toextract a wide variety of endohedral rare-earth fullerenes of the typeLn
C2n (Ln = La, Ce, Pr, Nd, Sm,Eu,Gd, Tb, Dy, Ho, Er, Tm, Yb). LnC80,LnC82, and Ln2C80 for most ofthe rare-earth metals can beproduced with high-yield and selectively extracted from the carbon-arcevaporation soot. Metallofullerenescontaining Sm, Eu, and Yb (which could have +2 oxidation states) areespecially difficult to extract. Somepossible reasons for the high-yield extraction are discussed. Thelaser desorption mass spectrometriccharacterization results indicate a relationship between the extractionyields of metallofullerenes and theoxidation states and ionic radii of the rare-earths.
C2n (Ln = La, Ce, Pr, Nd, Sm,Eu,Gd, Tb, Dy, Ho, Er, Tm, Yb). LnC80,LnC82, and Ln2C80 for most ofthe rare-earth metals can beproduced with high-yield and selectively extracted from the carbon-arcevaporation soot. Metallofullerenescontaining Sm, Eu, and Yb (which could have +2 oxidation states) areespecially difficult to extract. Somepossible reasons for the high-yield extraction are discussed. Thelaser desorption mass spectrometriccharacterization results indicate a relationship between the extractionyields of metallofullerenes and theoxidation states and ionic radii of the rare-earths.