Chrysene compounds for deep blue luminescent applications
View Patent ↗This disclosure relates to chrysene compounds with deep blue emission that are useful in electroluminescent applications. It also relates to electronic devices in which the active layer includes such a chrysene compound.
1. A compound having Formula I:
wherein:
Ar 1 and Ar 3 are the same or different and are aryl, and at least one of Ar 1 and Ar 3 has at least one electron-withdrawing substituent;
Ar 2 and Ar 4 are the same or different and are aryl;
R 1 and R 3 are electron-withdrawing groups, excluding cyano;
R 2 , R 5 and R 7 through R 11 are H and;
R 4 is selected from the group consisting of H and an electron-withdrawing group;
wherein said compound is capable of emitting deep blue light.
2. The compound of claim 1 , wherein the electron-withdrawing group is selected from group consisting of fluoro, cyano, perfluoroalkyl, nitro, perfluoroaryl, —SO 2 R, and combinations thereof, where R is alkyl or perfluoroalkyl.
3. The compound of claim 1 , wherein both Ar 1 and Ar 3 have at least one electron-withdrawing substituent.
4. The compound of claim 3 , wherein both Ar 1 and Ar 3 have two or more electron-withdrawing substituents.
5. The compound of claim 1 , wherein Ar 1 and Ar 3 are phenyl.
6. The compound of claim 1 , wherein Ar 2 and Ar 4 are selected from the group consisting of phenyl, biphenyl, naphthyl, and binaphthyl.
7. The compound of claim 6 , wherein Ar 2 and Ar 4 are biphenyl.
8. The compound of claim 6 , wherein at least one of Ar 2 and Ar 4 has at least one alkyl substituent.
9. The compound of claim 3 , wherein Ar 2 and Ar 4 each have at least one electron-withdrawing substituent.
10. The compound of claim 1 , in which at least one of R 1 and R 3 is halogen.
11. The compound of claim 10 , in which R 3 is fluorine.
12. The compound of claim 11 , in which the compound is E1 or E2: