Fullerene derivative and lubricant

1. A fullerene derivative comprising, in a molecule:

a fullerene backbone; and

n pyrrolidine rings each being condensed to the fullerene backbone,

each of the pyrrolidine rings including one aryl group including m substituents each including a perfluoropolyether chain, “m” being an integer from 2 to 5 and “n” being an integer from 1 to 5.

2. The fullerene derivative according to claim 1 , wherein the fullerene derivative is a chemical compound expressed by the following general formula (1) in which “FLN” is the fullerene backbone, (A) m indicates the m substituents each including a perfluoropolyether chain, and “R 1 ” is a hydrogen atom or a hydrocarbon group whose carbon number is less than or equal to 24

3. The fullerene derivative according to claim 2 , wherein the “R 1 ” is an alkyl group or an aryl group whose carbon number is less than or equal to 24.

4. The fullerene derivative according to claim 1 , wherein the fullerene backbone is C 60 .

5. The fullerene derivative according to claim 1 , wherein each of the m substituents includes at least a partial structure selected from —(CF 2 ) x O— in which “x” is an integer from 1 to 5.

6. The fullerene derivative according to claim 5 , wherein each of the m substituents includes a partial structure expressed by —(CF 2 CF 2 O) y (CF 2 O) z — in which each of “y” and “z” is an integer from 1 to 50.

7. The fullerene derivative according to claim 1 , wherein each of the m substituents is configured only by a perfluoropolyether structure.

8. The fullerene derivative according to claim 1 , wherein each of the m substituents is a straight-chain.

9. A lubricant comprising the fullerene derivative according to claim 1 .

10. The lubricant according to claim 9 , further comprising a perfluoropolyether chemical compound that does not include a fullerene backbone.