Synthesis, characterization and theoretical study of a new liquid crystal compound with an oxazepine core
作者:AbdulKarim-Talaq Mohammad、Guan-Yeow Yeap、Hasnah Osman
DOI:10.1016/j.molstruc.2015.01.043
日期:2015.5
formation of mesophases is strongly dependent on the type of core moiety. All compounds with oxazepinediones and oxazepanediones are non-mesogenic and only exhibit Cr1 Cr2 upon cooling and heating. However, the SmA and N phases were observed in the 5,6-benzo [1,3] oxazepine-4,7-diones series of compounds. The study also revealed that the length of the alkyl chain has a significant effect on the liquid crystalline
摘要 已经进行了含有末端烷氧基链的七元 1,3-氧氮杂环液晶化合物的新合成。这些化合物的分子结构由 FT-IR NMR 元素分析证实。研究了其衍生物的结构与介晶行为之间的关系。结果表明中间相的形成强烈依赖于核心部分的类型。所有含有氧氮杂二酮和氧氮杂二酮的化合物都是非介晶的,在冷却和加热时仅表现出 Cr1 Cr2。然而,在 5,6-苯并 [1,3] oxazepine-4,7-diones 系列化合物中观察到 SmA 和 N 相。研究还表明,烷基链的长度对液晶性能有显着影响;向列相只能在 5,6-苯并 [1,3] oxazepine-4,7-diones 的长链衍生物中观察到。理论研究与我们的结果一致。