Organic electroluminescent materials and devices

1. A compound having Formula I:

A-(L 1 ) n -Z-(L 2 ) m -B,  Formula I;

wherein A and B are each independently

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

wherein L 1 and L 2 are each independently selected from the group consisting of heteroaryl, alkyl, cycloalkyl, non-aromatic heterocycle, silyl, oxygen, and combination thereof;

wherein L 1 and L 2 may be optionally substituted with one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;

wherein n and m are each 0;

wherein Z is selected from the group consisting of:

and

wherein Z can be optionally substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.

2. The compound of claim 1 , wherein R 1 and R 2 are each independently selected from the group consisting of phenyl, biphenyl, naphthalene, terphenyl, naphthalene, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene, dibenzofuran, dibenzothiophene, benzofuran, benzothiophene, dibenzoselenophene, benzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene and azacarbazole.

3. The compound of claim 1 , wherein A and B are each independently selected from the group consisting of:

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

5. A compound selected from the group consisting of:

6. An organic light emitting device (OLED) comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, comprising a compound selected from the group consisting of compounds 33-41 and a compound of Formula I:

wherein in Formula I:

A-(L 1 ) n -Z-(L 2 ) m -B  (Formula I);

wherein A and B are each independently

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

wherein L 1 and L 2 are each independently selected from the group consisting of heteroaryl, alkyl, cycloalkyl, non-aromatic heterocycle, silyl, oxygen, and combination thereof;

wherein L 1 and L 2 may be optionally substituted with one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;

wherein n and m are each 0;

wherein Z is selected from the group consisting of:

and

wherein Z can be optionally substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.

7. The OLED of claim 6 , wherein the organic layer is an emissive layer and the compound is a host.

8. The OLED of claim 6 , wherein the organic layer further comprises a phosphorescent emissive dopant; wherein the emissive dopant is a transition metal complex having at least one ligand or part of the ligand if the ligand is more than bidentate selected from the group consisting of:

wherein each X 1 to X 13 are independently selected from the group consisting of carbon and nitrogen;

wherein X is selected from the group consisting of BR′, NR′, PR′, O, S, Se, C═O, S═O, SO 2 , CR′R″, SiR′R″, and GeR′R″;

wherein R′ and R″ are optionally fused or joined to form a ring;

wherein each R a , R b , R c , and R d may represent from mono substitution to the possible maximum number of substitution, or no substitution;

wherein R′, R″, R a , R b , R c , and R d 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; and

wherein any two adjacent substitutents of R a , R b , R c , and R d are optionally fused or joined to form a ring or form a multidentate ligand.

9. The OLED of claim 6 , wherein the organic layer is a blocking layer and the compound is a blocking material in the organic layer.

10. The OLED of claim 6 , wherein the organic layer is a transporting layer and the compound is a transporting material in the organic layer.

11. The OLED of claim 6 , wherein the OLED is incorporated into a device selected from the group consisting of a consumer product, an electronic component module, and a lighting panel.

12. A formulation comprising a compound having Formula I:

A-(L 1 ) n -Z-(L 2 ) m -B,  Formula I;

wherein A and B are each independently

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

wherein L 1 and L 2 are each independently selected from the group consisting of heteroaryl, alkyl, cycloalkyl, non-aromatic heterocycle, silyl, oxygen, and combination thereof;

wherein L 1 and L 2 may be optionally substituted with one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;

wherein n and m are each 0;

wherein Z is selected from the group consisting of:

and

wherein Z can be optionally substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.