Phosphorescent heteroleptic phenylbenzimidazole dopants and new synthetic methodology

1. A compound having a structure according to Formula I:

wherein R 1 may represent mono- or di-substitution;

wherein R 2 , R 3 and R 4 may represent mono-, di-, tri- or tetra-substitution;

wherein R 1 , R 2 , R 3 , R 4 and R 5 are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl sulfonyl, phosphino, and combinations thereof;

wherein R 1 , R 2 , R 3 and R 4 are optionally fused;

wherein X is selected from the group consisting of CRR′, SiRR′, C═O, N—R, B—R, O, S, SO, SO 2 , and Se;

wherein R and R′ are independently selected from the group consisting of linear alkyl, branched alkyl, and aryl; and

wherein n=1 or 2.

2. The compound of claim 1 , wherein the compound has the formula:

wherein R 6 represents mono-, di-, tri- or tetra-substitution;

wherein R 6 is selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

wherein R 6 is optionally fused and may be further substituted.

3. The compound of claim 2 , wherein R 6 , R 2 , and R 4 are hydrogen.

4. The compound of claim 1 , wherein n=2.

5. The compound of claim 1 , wherein n=1.

6. The compound of claim 1 , wherein X is selected from the group consisting of O and S.

7. The compound of claim 1 , wherein X is O.

8. The compound of claim 1 , wherein X is S.

9. The compound of claim 1 , wherein R 5 is aryl or substituted aryl.

10. The compound of claim 9 , wherein R 5 is a 2,6-disubstituted aryl.

11. The compound of claim 10 , wherein R 5 is

12. The compound of claim 1 , wherein R 5 is alkyl.

13. The compound of claim 1 , wherein R 2 , R 3 , and R 4 are independently selected from the group consisting of hydrogen and alkyl, and wherein at least one of R 2 , R 3 , and R 4 is alkyl.

14. The compound of claim 1 , wherein R 3 is aryl or heteroaryl.

15. The compound of claim 14 , wherein R 3 is phenyl or substituted phenyl.

16. The compound of claim 1 , wherein the compound is selected from the group consisting of:

17. The compound of claim 1 , were in the compound is selected from the group consisting of:

18. A first device comprising an organic light emitting device, comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, comprising a compound having the Formula:

wherein R 1 may represent mono- or di-substitutions;

wherein R 2 , R 3 and R 4 may represent mono-, di-, tri- or tetra-substitution;

wherein R 1 , R 2 , R 3 , R 4 and R 5 are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrite, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;

wherein R 1 , R 2 , R 3 and R 4 are optionally fused;

wherein X is selected from the group consisting of CRR′, SiRR′, C═O, N—R, B—R, O, S, SO, SO 2 , and Se;

wherein R and R′ are independently selected from the group consisting of linear alkyl, branched alkyl, and aryl; and

wherein n=1 or 2.

19. The first device of claim 18 , wherein the organic layer is an emissive layer and the compound is an emissive dopant.

20. The first device of claim 18 , wherein the organic layer further comprises a host.

21. The first device of claim 20 , wherein the host comprises triphenylene containing benzo-fused thiophene or benzo-fused furan;

wherein any substituent in the host is an unfused substituent independently selected from the group consisting of C n H 2n+1 , OC n H 2n+1 , OAr 1 , N(C n H 2n+1 ) 2 , N(Ar 1 )(Ar 2 ), CH═CH—C n H 2n+1 , C≡CC n H 2n+1 , Ar 1 , Ar 1 —Ar 2 , C n H 2n —Ar 1 , or H;

wherein n is from 1 to 10; and

wherein Ar 1 and Ar 2 are independently selected from the group consisting of benzene, biphenyl, naphthalene, triphenylene, carbazole, and heteroaromatic analogs thereof.

22. The first device of claim 21 , wherein the host has the formula:

23. The first device of claim 20 , wherein the host is a metal complex.

24. The first device of claim 18 wherein the first device is a consumer product.

25. The first device of claim 18 , wherein the first device is an organic light-emitting device.

26. The first device of claim 18 , wherein the compound of Formula I is a first emissive dopant, and the first device further comprises a second emissive dopant having a peak wavelength of between 400 to 500 nanometers.

27. The first device of claim 26 , wherein the second emissive dopant is a fluorescent emitter.

28. The first device of claim 26 , wherein the second emissive dopant is a phosphorescent emitter.

29. The first device of claim 18 , wherein the first device comprises a lighting panel.

30. The first device of claim 18 , wherein the first device further comprises a first organic light-emitting device comprising a compound of Formula I and a second light-emitting device separate from the first organic light-emitting device comprising an emissive dopant having a peak wavelength of between 400 to 500 nanometers.

31. The first device of claim 18 , wherein the first device comprises an organic light-emitting device having a first emissive layer and a second emissive layer;

wherein the first emissive layer comprises a compound of Formula I; and

wherein the second emissive layer comprises an emissive dopant having a peak wavelength of between 400 to 500 nanometers.