trophotographic toners, and electroluminescent devices. [0118] Illustrative examples of suitable organic materials of high molecular weight which can be colored with the inventive fluorescent maleimides of this invention are vinyl polymers, for example polystyrene, poly-??-methylstyrene, poly-p-methylstyrene, poly-p-hydroxystyrene, poly-p-hydroxyphenylstyrene, polymethyl methacrylate and polyacryl