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通过对L-异亮氨酸化合物进行扩展性研究及分子设计,本论文合成了四种含(2S,3S)-3-甲基-2-氯戊酰氧基的手性液晶单体(M1～M4),然后再以六氯合铂酸为引发剂,将四种单体通过接枝聚合,获得了对应的聚硅氧烷类液晶高分子(P1～P4),采用FT-IR、1 H-NMR与GPC表征了所合成的中间体、手性液晶单体及其聚合物的化学结构与分子量及分布,结果符合分子设计。此外,采用旋光仪测定了手性单体的旋光度,研究表明:它们均为右旋化合物,其比旋光度随化合物刚性的增加而降低,而对于端基相同、液晶核刚性大小接近的单体,其比旋光度比较接近。
Through the scalability research and molecular design of L-isoleucine compounds, four kinds of (2S, 3S) -3-methyl-2-chloropentanoyloxy chiral liquid crystal monomers ~ M4), and then the hexachloroplatinic acid as initiator, the four monomers through graft polymerization, the corresponding polysiloxane liquid crystal polymer (P1 ~ P4), the use of FT-IR, 1 The chemical structure, molecular weight and distribution of the synthesized intermediates, chiral liquid crystal monomers and their polymers were characterized by H-NMR and GPC. The results were in good agreement with the molecular design. In addition, the polarimetry of chiral monomers was measured by polarimetry. The results showed that all of them are dextrorotatory compounds, and their specific optical rotation decreases with the increase of the rigidity of the compounds. For the same end, Body, its optical rotation is relatively close.