| 摘要 |
PROBLEM TO BE SOLVED: To provide a compound containing dibenzo[1,4]azaborine, and device and composition containing the compound.SOLUTION: A compound contains a ligand Lrepresented by the formula I, where Eis N, Eis B, Rand Rrepresent a substitution or unsubstitution and any 2 adjacent Rand/or Rmay bind to form a ring, and binding to a metal M and M does not bind to Eand E, as well as Lcan bind to other ligands to form plural bidentate ligands. |
