Patent ID: 7318964

Claim:
A fluorene compound represented by the following general formula: wherein R represents hydrogen, C 1 -C 22 aliphatic alkyl or alkoxy, C 1 -C 22 alicyclic alkyl or alkoxy, C 6 -C 18 aryl or aryloxy, or alkyl or aryl derivatives of silicon, tin or germanium; R′ means a functional group which presents in meta- or para-position of the phenyl and is selected from the group consisting of amide, aldehyde, ketone, sulfone, sulfide, nitro, nitrile, halogen, carboxylic acid, boronic acid, hydrazide, isocyanate, urethane, carbonate, chloromethyl, anhydride, cyanate, azometine, quinoline, oxadiazole and azo, wherein R′ is not bromine, provided that if R is methyl, then R′ is not at para-position of phenyl; and n represents 0.