Abstract

The azo homologous series of (E)-2-chloro-3-((4-n-alkoxynaphthalene-1-yl) diazenyl) pyridine consisting of 11 homologs was synthesized. All homologs of synthesized homologous series are mesogenic in behavior. All homologs of the homologous series are enantiotropic nematic. The textures of the nematic phase are of the threaded or schlieren type. Transition curves showing phase behavior in a phase diagram behave in normal manner. An odd–even effect is observed for the nematic–isotropic transition curve. Thermal phase transitions were observed through an optical polarizing microscope equipped with a heating stage. Analytical and spectral data support the molecular structures of the homolog molecules. Smectogenic character is totally absent from all the novel homologs.

摘要

合成了由11个同系物组成的（E）-2-氯-3-（（4-正烷氧基萘-1-基）二氮烯基）吡啶的偶氮同源系列。合成的同源序列的所有同源物在行为上都是介晶的。同源系列的所有同源物都是对映向列型。向列相的织构为线状或schlieren型。在相图中显示相行为的过渡曲线以正常方式运行。向列-各向同性过渡曲线观察到奇偶效应。通过配备有加热台的光学偏振显微镜观察到热相变。分析和光谱数据支持同系物分子的分子结构。在所有新的同系物中都完全没有致菌性。