This invention features a compound having the formula:
##STR1##
X is O or NR1; and each of Y and Z, independently, is
##STR2##
in which each of R1, R2, R3, and R4,
independently, is alkyl, cyclyl, heterocyclyl, aralkyl, aryl, or heteroaryl; Ar1
is aralkyl, aryl, or heteroaryl; and Ar2 is cyclyl, heterocyclyl, aralkyl,
aryl, or heteroaryl; or Ar1 and Ar2 taken together is heterocyclyl,
aralkyl, or heteroaryl. This compound can be used as a red light emitting material
in an electro-luminescence device.
