| 主权项 |
1. A compound having a formula: Formula I; wherein L1 is selected from the group consisting of a direct bond, phenyl, biphenyl, terphenyl, fluorene, carbazole, pyridine, pyrimidine, pyrazine, pyridazine, triazine, naphthalene, anthracene, and combinations thereof; wherein G1 is selected from the group consisting of: wherein X is selected from the group consisting of oxygen, sulfur, and selenium; wherein R1, R5, R7, R8, R12, and R13 each independently represent mono, di, tri, or tetra substitution, or no substitution; wherein R2, R3, R4, R5, R6, R9, R10, and R11 each independently represent mono, di, or tri substitution, or no substitution; wherein R1 to R13 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, alkoxyl, halogen, silyl, nitro, benzene, biphenyl, terphenyl, naphthalene, phenanthrene, benzofuran, benzothiophene, benzoselenophene, dibenzofuran, dibenzothiophene, dibenzoselenophene, fluorene, triphenylene, carbazole, pyridine, pyrimidine, pyrazine, pyridazine, triazine, quinoline, phenanthroline, aza-dibenzofuran, aza-dibenzothiophene, aza-dibenzoselenophene, aza-fluorene, aza-triphenylene, aza-carbazole, and combinations thereof; wherein Z1 to Z20 are each independently selected from the group consisting of carbon and nitrogen; wherein at least one of Z1, Z2, Z3, Z4, Z5, Z6, Z7, and Z8 is nitrogen; and at least one of Z9, Z10, Z11, Z12, Z13, Z14, Z15, Z16, Z17, Z18, Z19, and Z20 is nitrogen; wherein when any of Z1 to Z20 is nitrogen, there is no substitution on that nitrogen; wherein L1 and G1 are bonded together by a C—C bond; wherein Ar1 is selected from the group consisting of benzene, biphenyl, terphenyl, triphenylene, fluorene, dibenzofuran, dibenzothiophene, dibenzoselenophene, naphthalene, phenanthrene, carbazole, pyridine, pyrimidine, pyrazine, pyridazine, triazine, azatriphenylene, aza-fluorene, aza-dibenzofuran, aza-dibenzothiophene, aza-dibenzoselenophene, aza-carbazole, quinolone, quinazoline, and combinations thereof; wherein L1 and Ar1 are each optionally further substituted with one or more substituents selected from the group consisting of deuterium, alkyl, alkoxyl, halogen, silyl, nitro, benzene, biphenyl, terphenyl, naphthalene, phenanthrene, dibenzofuran, dibenzothiophene, dibenzoselenophene, fluorene, triphenylene, carbazole, pyridine, pyrimidine, pyrazine, pyridazine, triazine, quinolone, phenanthroline, aza-dibenzofuran, aza-dibenzothiophene, aza-dibenzoselenophene, aza-fluorene and aza-triphenylene, aza-carbazole, and combinations thereof; and wherein the compound of Formula I contains at most one non-fused carbazole moiety. |
