| abstract |
A compound having a formula selected from the group consisting of: n nis disclosed. In these structures, each one of A 1 to A 16 is N or C bonded to the applicable one of R 1 , R 2 , R 3 , and R 4 ; ring A and ring B are joined by a C—C bond; each R 1 to R 6 is independently hydrogen or a variety of substituents; and any two of R 1 to R 6 are optionally joined or fused into a ring, provided that the following compound is excluded:n n nOrganic light emitting devices and consumer products containing the compounds are also disclosed. |