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碗状的CTV(cyclotriveratrylene)系衍生物主要由三聚法合成,即以香兰素为原料,先制备所需结构的单体衍生物,再进行三聚关环的方法,但该方法无法合成具有较大外围基团的CTV衍生物.新设计了先关环后衍生化的合成路线,成功地合成了一种含较长脂肪链外围基团的新CTV衍生物-CTV-Ⅲ.产物的化学结构经1H-NMR1、3C-NMR、质谱以及元素分析表征验证.通过差示扫描量热法、热台偏光显微镜和小角激光光散射的研究表明,CTV-Ⅲ具有热致液晶性,在其液晶温区内呈现向列相,称为碗状液晶向列相(BN相).CTV-Ⅲ的升温相变序为:G 70℃Cr 87℃BN100℃I.
Bowl CTV (cyclotriveratrylene) derivatives mainly synthesized by the trimerization method, namely vanillin as raw material, the first structure of the desired monomer derivatives, and then trimerization ring closure method, but the method can not be synthesized CTV derivatives with larger peripheral groups were synthesized.The new route of derivatization after ring closure was newly designed and a new CTV derivative-CTV-Ⅲ with longer fatty chain peripheral groups was successfully synthesized The chemical structure was confirmed by1H-NMR1,3C-NMR, mass spectrometry and elemental analysis. The study of differential scanning calorimetry, hot stage polarization microscopy and small-angle laser light scattering showed that CTV-Ⅲhas thermotropic liquid crystallinity, The nematic phase in the liquid crystal region is called the nematic phase of the nematic liquid crystal (BN phase). The temperature-programmed phase change of CTV-Ⅲ is: G 70 ℃ Cr 87 ℃ BN100 ℃ I.