主权项 |
1. A compound having a formula (I):
A-L-B (I), wherein A contains a group selected from the group consisting of indole, carbazole, benzofuran, dibenzofuran, benzothiophene, dibenzothiophene, benzoselenophene, dibenzoselenophene, triphenylene, azacarbazole, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, azatriphenylene, and combinations thereof, which are optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof; wherein the substitution of one or more groups in A is optionally fused to the indole, carbazole, benzofuran, dibenzofuran, benzothiophene, dibenzothiophene, benzoselenophene, dibenzoselenophene, triphenylene, azacarbazole, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, or azatriphenylene group; wherein L is a single bond or comprises an aryl or heteroaryl group having from 5-30 carbon atoms, which is optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof; and wherein B is an all-benzenoid group having at least 24 carbon atoms, which are optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof. |