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United States Patent 5,223,479
McCauley, Jr., et. al.Jun. 29, 1993

Process for preparing alkali metal-doped fullerenes

Inventors: McCauley, Jr.; John P. (Folscroft, PA); Zhu; Qing (Philadelphia, PA); Vaughan; Gavin (Philadelphia, PA); Coustel; Nicole (Philadelpha, PA).
Assignee: The Trustees of the University of Pennsylvania (Philadelphia, PA).
Appl. No.: 738,888
Filed: Aug. 1, 1991

Intl. Cl.:H01L 39/24; H01L 39/12; C01B 31/00;
U.S. Cl.:505/1.; 505/725.;
Field of Search:500;518

References Cited

Other References

Primary Examiner: Lieberman; Paul
Assistant Examiner: Swope; Bradley A.


Superconducting, metal-doped fullerenes are provided, along with processes for their preparation in relatively high stoichiometric purity. In one embodiment, the processes provide fullerenes of the formula M(3) C(60) where M is an alkali metal. The processes comprise contacting C(60) with alkali metal in an amount and under reaction conditions effective to produce a compound having the formula M(y) C(60), where y is greater than 3, and contacting said M(y) C(60) with a portion of C(60) in an amount and under reaction conditions effective to produce said M(3) C(60).

11 Claims, 4 Drawing Figures

Government Interest


Certain of the inventors have been supported by National Science Foundation MRL Program grant DMR 88-19885.

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