A new series of fluorinated salts, iodides and trifluoromethanesulfonates, was synthesized from perfluoroalkylated 1,2,4-oxadiazolylpyridines. Their thermotropic properties were investigated by combined temperature resolved small angle and wide angle X-ray scattering, differential scanning calorimetry and polarised optical microscopy. The UV–visible and photoluminescence properties were studied for all compounds. The results showed for two compounds the existence of an enantiotropic mesomorphic smectic liquid crystal phase. All iodides showed thermochromism phenomena suggesting prospective applications in optoelectronics.
一种新的
氟化盐、
碘化物和
三氟甲磺酸盐系列是通过
全氟烷基化的
1,2,4-恶二唑基
吡啶合成的。通过结合温度分辨的小角度和大角度X射线散射、差示扫描热量法和偏振光学显微镜对它们的热变性特性进行了研究。对所有化合物进行了紫外–可见光和光致发光特性的研究。结果显示,有两个化合物存在外消旋型的层状液晶相。所有
碘化物都显示出热致变色现象,暗示其在光电电子学中的潜在应用。