| abstract |
The present invention provides a fullerene derivative represented by the following formula (1): n wherein in formula (1), R 1 is a substituted or unsubstituted organic group or a hydrogen atom, and wherein in formulae (2) and (3): W is a single bond, C 1 -C 11 , alkylene, C 2 -C 12 alkenylene, or C 2 -C 12 alkynylene, wherein any —CH 2 — in the alkylene, alkenylene or alkynylene can be substituted with —O—, —S—, —COO—, or —OCO—; Z is an element belonging to group IVB; and R 21 to R 23 are each independently a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 2 -C 15 alkenyl group, or a substituted or unsubstituted C 2 -C 15 alkynyl group. |