Two series of terminal epoxy compounds, PmOBC (m = 1, 2, 3, 4) and P1OBEn (n = 6, 8, 10, 12), were synthesized for investigating the effect of epoxidation on mesomorphic and thermal stabilities. Molecular polarization and configuration obtained by DFT calculations can provide theoretical perspective. In addition, thermal stability is evaluated by the combination of DSC, TGA, and 1H NMR. Compared with
合成了两个系列的端基环氧化合物PmOBC(m = 1,2,3,4)和PlOBEn(n = 6,8,10,12),以研究环氧化对介晶和热稳定性的影响。通过DFT计算获得的分子极化和构型可以提供理论观点。此外,通过
DSC,TGA和1的组合评估热稳定性1 H NMR。与相应的烯基化合物相比,环氧化可降低分子偶极矩并增加分子空间效应,这不利于LC相的形成,但降低的分子内能可能有助于改善热稳定性。因此,这些末端环氧LC很有希望用于需要极高温环境的显示设备中。