Patent ID: 7737248

Claim:
A charge transporting compound composed of a polymer whose polymer main chain has a fluorene derivative, which is substituted with an amino group having an aromatic ring or a heterocyclic ring, connected thereto at the 9 position of the derivative, wherein said polymer has a structure of the following formula (1) wherein Ar 1 , Ar 2 , Ar 3 and Ar 4 may be the same or different and represent a substituted or unsubstituted aromatic ring or heterocyclic ring provided that Ar 1 and Ar 2 , and Ar 3 and Ar 4 may be, respectively, combined to form a ring, R 1 and R 2 , respectively, represent a divalent benzene, alkane or aralkane, and R 3 represents a divalent organic group having a phenoxy group at opposite ends thereof and which may have a substituent group, the number average molecular weight of the polymer ranges from 1,000 to 1,000,000, wherein n is an integer larger than 1.