9,9'- AND 2,2'-SUBSTITUTED 3,3'-BICARBAZOLYL DERIVATIVES FOR USE IN SEMICONDUCTING MATERIALS AS A HOST MATRIX FOR PHOSPHORESCENT EMITTERS

摘要

The present invention relates to carbazole compounds of formula (I) and a semiconducting material comprising such carbazole compounds. It also relates to a process for the preparation of such carbazole compounds, as well as to the use thereof as a semiconducting material, in particular as a host matrix for phosphorescent emitters, (I) wherein -R1, and -R2 are, the same or different at each occurrence, -OR41, -OR42, -SR41, -SR42, -NR41 R45, or -NR42R45, and -R3 and -R4 are, the same or different at each occurrence, R41, or R42, with R41 being C1-C2O cyclic or acyclic straight or branched alkyl, optionally interrupted one or more times with -O-, -OC(=O)-, -C(=O)O-, -S-, secondary nitrogen, tertiary nitrogen, quaternary nitrogen, -CR45=CR46-, -C≡C-, -C(=O)-, -C(=O)NR45-, - NR45C(=O)-, -S(=O)-, -S(=O)2-, or -X6-, and/or substituted one or more times with R42, R7, or R8; R42 being C5-C30 aryl in which, optionally, one or more of the aromatic carbon atoms are replaced with N, O or S, and, optionally, one or more of the aromatic carbon atoms carry a group R41, R7, or R8; R7 being -CN, -CF3, -CSN, -NH2, -NO2, -NCO, -NCS, -OH, -F, -PO2, -PH2, -SH, -Cl, -Br, or -I; R8 being -C(=O)R45, -C(=O)OR45, -C(=O)NR45R46, -NHR45, -NR45R46, -N(+)R45R46R47, -NC(O)R45-, -OR45, -OC(=O)R45, -SR45, -S(=O)R45, or -S(=O)2R45; R45 ,R46, and R47 being, the same or different at each occurrence, H, R41, or R42; the other substituents are defined in the claims.