Patent ID: 8092773

Claim:
A liquid fullerene derivative represented by the following formula (1): wherein R 1 , R 2 and R 3 which are the same or different represent first to third alkyl substituents having at least 12 carbon atoms as the saturated alkyl chains; A represents a fullerene moiety represented by the following formula (2): wherein (Fu) represents fullerene, X represents a methyl group; and a benzene ring is bonded to a nitrogen-containing five-membered ring of the fullerene moiety A, the first to third alkyl substituents R 1 , R 2 and R 3 each being selected from the group consisting of alkyl (C n H 2n+1 ), alkoxyl (OC n H 2n+1 ) and thioalkyl (SC n H 2n+1 ), wherein n is an integer of 12 or more.