Patent ID: 8124762

Claim:
Diphenyl amine derivatives of Formula 1: wherein each of R 1 and R 2 is selected from the group consisting of a hydrogen atom; a C 1 -C 8 alkyl; a substituted or unsubstituted phenyl; a biphenyl; a substituted or unsubstituted naphthyl; and a substituted or unsubstituted benzyl group, wherein the substituted benzyl group is substituted with a C 1 -C 8 alkyl or a C 1 -C 8 alkoxy group; and each of the substituted phenyl and the substituted naphthyl groups are substituted with 1-3 substituent(s) selected from the group consisting of a halogen atom, cyano, nitro, carboxyl, sulfonyl, hydroxy, amino, a C 1 -C 8 alkylamino, a C 1 -C 8 alkyl, a C 1 -C 8 alkoxy, a C 2 -C 8 alkenyl, phenyl, 4-styryl, phenoxy, naphthoxy, phenylamino, and naphthylamino groups.