Several compounds from the group of (E)-4-[(4-propyloxyphenyl)diazenyl]phenyl alkanoates (3OABOOCm, for m = 1 – 19) were synthesized, with the derivatives for m ≥ 8 being reported for the first time. The phase situation was investigated by polarizing optical microscopy, thermo-optical analysis, and differential scanning calorimetry methods. The enantiotropic nematic mesophase was noted for compounds where m = 2 – 13, whereas the monotropic nematic phase was observed for m = 1, 14, and 15. Multiple crystalline phase were noticed in selected derivatives (for m = 1 – 3, 9, 13, and 14). The X-ray powder diffraction confirmed the polymorphism of the crystalline phase for the 3OABOOC2 compound. The trans-cis photoisomerization process is attributed to the presence of the diazenyl (azo) group. Absorption spectra, collected as a function of UV light exposure time, indicated a first-order reaction comprising two components. The determined values of the kinetic constant k were of the order of 10^-2 s ^− 1.

来自(E)-4-[(4-丙氧基苯基)的几种化合物二氮烯基]链烷酸苯酯 (3OABOOCm，用于 < a i=8>m = 1 – 19) 被合成，其中 m ≥ 8 的衍生物被报告为第一次。通过偏光光学显微镜、热光分析和差示扫描量热法研究了相情况。对于 m = 2 – 13 的化合物，观察到对映向列相中间相，而对于 观察到单向向列相m = 1、14 和 15。在选定的衍生物中观察到多个晶相（对于 m = 1 – 3、9、13 和 14）。 X射线粉末衍射证实了3OABOOC2化合物的晶相多晶型。 反式-顺式光异构化过程归因于二氮烯基（偶氮）基团的存在。吸收光谱作为紫外光暴露时间的函数收集，表明一级反应包含两个组分。测定的动力学常数k约为10^-2s⁻¹。