The present invention relates to benzo[f]chromene and pyrano[3,2-f]-chromene derivatives of the formula I
in which
L1, L2, R1, R2, A1, A2, Z1, Z2, m and n are as defined in claim 1, to the preparation thereof, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements which contain the liquid-crystalline media according to the invention.
本发明涉及式I的苯并[f]色烯和
吡喃[3,2-f]-色烯衍
生物,其中L1、
L2、R1、R2、A1、A2、Z1、Z2、m和n如权利要求1所定义,其制备方法,其作为液晶介质组分的用途,以及包含本发明所述液晶介质的电致光显示元件。