| abstract |
The invention relates to tricyclic aromatics of the general formula I n nin which A 1 , A 2 , A 3 , A 4 , Q 1 -Q 2 , R 1 , R 2 , X 1 , X 2 , X 3 , Z 1 , Z 2 , Z 3 , Z 4 , q, r, s, t and u have the meaning indicated, and to the use thereof as components of liquid-crystalline media and to an electro-optical display element containing same. |