| abstract |
An organic electroluminescent element using a compound represented by the formula is, light emission of blue-black, even after driving for a long time change in chromaticity, drive voltage variation is small [R 1 ~ R 6 Is a hydrogen atom or a substituent; Q 1 and Q 2 Is a 6-membered monocyclic aromatic ring or a 6-atom monocyclic nitrogenous aromatic heterocyclic ring; One of X 1 and X 4 or X 2 and X 3 is a single bond and the other is CR 51 R 52 , NR 53 , O, S, SiR 54 R 55 A connector; R 51 to R 55 represent a hydrogen atom or a substituent. Provided that the number of carbon atoms constituting the ring of Q 1 and the ring constituting the ring of Q 2 are different or X 1 and X 2 And X < 3 > and X < 4 > The connecting group represented by one side is different.] |