| abstract |
This invention is to provide a green light-emitting device with high light-emitting effec, long-period life, and high color purity by using a light-emitting device material containing the pyrromethene skeleton compound represented by the general formula (1), and having molecular weight of more than 450. (Each of R1 to R4 is alkyl, cycloalkyl, alkoxy, or arylether, and each of them may be the same or different. R5 and R6 are halogen, hydrogen or alkyl, and each of them may be the same or different. R7 is anyone of aryl, heteroaryl, or alkenyl, and molecular weight of more than 200. M is at least one of group selected from boron, beryllium, magnesium, aluminum, chromium, iron, cobalt, nickel, copper, zinc, and platinum, n is an integer of 0 to 4. m is an integer of 1 to 3. L bonds to M via 1 or 2 intramolecular atom, by group of valence of 1 or valence of 2 selected from halogen, hydrogen, alkyl, aryl, or heteroaryl. Each of L could be the same or different if n is 2 to 4. Each of R1 to R7 on pyrromethene skeleton could be the same or different if m is 2 or 3. |