阅读说明：本技术 二苯并呋喃和二苯并噻吩的衍生物 (Dibenzofurane and dibenzothiophene derivatives ) 是由 L·列特扎 A·格特兹 H·赫施曼 M·恩格尔 于 2018-06-11 设计创作，主要内容包括：本发明涉及式I化合物<Image he="140" wi="700" file="DDA0002316000520000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>其制备,其作为液晶介质中的组分的用途以及包含本发明的液晶介质的电光显示元件,其中出现的基团和参数具有权利要求1的定义。(The invention relates to compounds of formula I Their preparation, their use as components in liquid-crystalline media and also electro-optical display elements comprising the liquid-crystalline media according to the invention, where the radicals and parameters which occur have the meanings given in claim 1.)