| abstract |
This invention features a compound having the formula: n n n X is O or NR 1 ; and each of Y and Z, independently, is n n n in which each of R 1 , R 2 , R 3 , and R 4 , independently, is alkyl, cyclyl, heterocyclyl, aralkyl, aryl, or heteroaryl; Ar 1 is aralkyl, aryl, or heteroaryl; and Ar 2 is cyclyl, heterocyclyl, aralkyl, aryl, or heteroaryl; or Ar 1 and Ar 2 taken together is heterocyclyl, aralkyl, or heteroaryl. This compound can be used as a red light emitting material in an electro-luminescence device. |