New (-)-menthol-based blue phase liquid crystals with different polar substituents in the terminal group: Synthesis, mesophase behaviors, and DFT calculations
作者:Zhi-Yuan Han、Shi-Qian Kun、Jing-Tian Kang、Ying-Gang Jia
DOI:10.1016/j.molstruc.2022.133147
日期:2022.9
Eight novel Schiff base ester chiral liquid crystals, MtLC-X (X: -OCH3, -CH3, -F, -H, -CF3, -OCF3, -NO2, -CN), were successfully synthesized and analyzed for their mesophase formation and stability. Each of them was attached to the end of (-)-menthol as a chiral group, and the other end of these molecules was connected with different polar substituent X. The chemical structures of the prepared compounds
成功合成并分析了8种新型席夫碱酯手性液晶MtLC-X(X:-OCH 3、-CH 3、-F、-H、-CF 3、-OCF 3、-NO 2、-CN)因为它们的中间相形成和稳定性。它们中的每一个都作为手性基团连接到(-)-薄荷醇的末端,并且这些分子的另一端与不同的极性取代基X连接。所制备化合物的化学结构通过FT-IR、1 H NMR 和13进行了表征C核磁共振。结合差示扫描量热仪 (DSC)、偏光显微镜 (POM) 和 X 射线衍射 (XRD) 测量,系统地研究了介晶性质的表征。通过紫外-可见光谱研究光物理性质。除了 H 衍生物 MtLC H 之外,所有制备的 CLC 都是介晶的,表现出 N* 和/或 S A * 中间相。结果表明,中间相的介晶行为和透明点(Tc)与极化率各向异性(Δα)有很好的相关性。