| abstract |
Compound having formula I: [Chemical 1] Is provided. In this formula: R 1 , R 1a , R 2 and R 2a are the same or different and are H, D, F, CN, alkyl, fluoroalkyl, aryl, heteroaryl, silyl, deuterated alkyl, deuterated moiety Fluorinated alkyl, deuterated aryl, deuterated heteroaryl, deuterated silyl, alkoxy, aryloxy, fluoroalkoxy, siloxane, siloxy, deuterated alkoxy, deuterated aryloxy, deuterated fluoroalkoxy, deuterated Hydrogenated siloxane or deuterated siloxy, provided that at least one of R 1 and R 1a is heteroaryl or deuterated heteroaryl; R 3 , R 3a , R 4 , R 4a , R 5 and R 6 in each case, identical or with different, D, F, CN, alkyl, fluoroalkyl, a , Heteroaryl, silyl, deuterated alkyl, deuterated partially fluorinated alkyl, deuterated aryl, deuterated heteroaryl, deuterated silyl, alkoxy, aryloxy, fluoroalkoxy, siloxane, siloxy, deuterated Hydrogenated alkoxy, deuterated aryloxy, deuterated fluoroalkoxy, deuterated siloxane or deuterated siloxy, wherein the adjacent groups selected from R 3 , R 3a , R 4 and R 4a are They can be joined together to form a fused ring; in each case R 7 is the same or different and is alkyl, aryl or a deuterated analog thereof, wherein two alkyl R 7 groups Can be joined together to form a cycloalkyl spiro ring, and two R 7 phenyl groups can be joined to form a spirofluorene group. A and b are the same or different and are 0 or 1, provided that a + b ≧ 1; x is an integer from 0 to 3; y is an integer from 0 to 4; , Z is an integer of 0-5. |