A compound represented by the following general formula is an excellent light-emitting material. R1 to R5 each independently represent a hydrogen atom or a substituent, and one of R1 to R5 is a cyano group, one to three of R1 to R5 each are an aryl group Ar optionally substituted with an alkyl group or an aryl group, and one to three of R1 to R5 each are a donor group D (but excepting one that corresponds to Ar).
由以下通式表示的化合物是一种优良的
发光材料。R1 至 R5 各自独立地代表一个氢原子或一个取代基,R1 至 R5 中的一个是
氰基,R1 至 R5 中的一至三个各自是可选地被烷基或芳基取代的芳基 Ar,R1 至 R5 中的一至三个各自是供体基团 D(但与 Ar 对应的一个除外)。