The introduction of chiral center and lateral fluorines enable the liquid crystals to give unusual smectic textures. 由于在分子中引入了手性中心和侧向氟原子,使得液晶呈现出不同寻常的近晶相织构。
Synthesis and Properties of Liquid Crystals Containing Ethylene Bridge and Fluorines 乙撑基桥键类含氟液晶的合成及性能研究
Theoretical Studies on the Structural Change of the N-Protonated Tetraphenylporphyrin(ⅱ) The Effects of the Substituting Groups Fluorines 四苯基卟啉质子化结构变化的理论研究(Ⅱ)&五氟苯基及吡咯环上氟的取代基效应
Results In disease's area county 79's against fluorine well, 29 using ( 36.71%), has among them ( 68.97%) 20 drinking water fluorines contents is normal. 结果病区县79个防氟井中,有29眼(36.71%)完好并可正常使用,其中有20眼(68.97%)饮水氟含量正常。2个监测点饮水氟含量分别为4.78mg/L和0.68mg/L;