Dimeric electron transport materials and their use in electrophotography

Abstract

A series of dimeric electron transport compounds have been prepared in a 3 step reaction. First 9-fluorenine-4-carboxylic acid was chlorinated with thionyl chloride to form 9-fluorenone-4-carbonyl chloride which was reacted with linkage groups to form dimeric intermediate. This intermediate was then reacted with malononitile to form the final product which was recrystallized and its structure was confirmed by proton NMR. [...].