| 摘要 |
The invention relates to compounds of the formula (I) in which Yand Yare O or NRor NR, where Rand Rare H or organyl; Zto Zare O or S; Rto R, Rto Rare Cl, F; where also 1 or 2 of the radicals Rto R, Rto Rmay be CN, and/or 1 radical Rto R, Rto Rmay be H; and where Zor Zmay also be NRwhen Yis NR, where Rand Rtogether are a bridging group X with 2 to 5 atoms; and where Zor Zmay also be NRwhen Yis NR, where Rand Rtogether are a bridging group X with 2 to 5 atoms; a process for the preparation thereof, and the use thereof as emitter materials, charge-transport materials or exciton-transport materials. |
