| abstract |
[PROBLEMS] To use only a complete organic compound, not an organometallic complex or an inorganic compound, which can be synthesized by a simple organic synthesis method and emits blue to red light in the order of time from microseconds to seconds at room temperature and in air. Providing luminescent materials. A luminescent material comprising a compound represented by the following formula showing phosphorescence and delayed fluorescence. (R1 and R3 are each independently H, substituted / unsubstituted alkyl group, substituted / unsubstituted alkoxyl group, acetyl group, Cl or Br; R2 is H or acetyl group; R4 and R5 are independently H, (Substituted / unsubstituted alkyl group or substituted / unsubstituted alkoxyl group) [Selection] None |