| 主权项 |
1. A compound having a formula:
G1—L—G2, Formula I; wherein G1 has the structure: and G2 has the structure: wherein L is selected from the group consisting of a direct bond, an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof; wherein the aryl group and the heteroaryl group are optionally further substituted with one or more groups 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 X is selected from the group consisting of O, S, and Se; wherein each of X1, X2, X3, X4, X5, X6, X7, X8, Z1, Z2, Z3, Z4, Z5, Z6, Z7, and Z8 is carbon or nitrogen; wherein at least two of X1, X2, X3, X4, X5, X6, X7, and X8 are nitrogen; wherein at least one of X1, X2, X3, and X4 is carbon and bonded to L; wherein the dashed lines represent the bonds between G1 and L and G2 and L; wherein each R2, R3, and R4 represent mono, di, tri, tetra substitutions or no substitution; wherein R1 represents mono, di, tri substitutions or no substitution; wherein R1, R2, R3, and R4 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 the substitution is optionally fused to G1 or G2; and wherein when R3 or R4 is carbazole or substituted carbazole, the carbazole or substituted carbazole is connected to G2 by N. |
