2,5-bis[(4'-octadecyloxybiphenyl)oxycarbonyl]-styrene | 1427270-56-1

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 缩酚酸和缩酚酸环醚类
• 英文名称: 2,5-bis[(4'-octadecyloxybiphenyl)oxycarbonyl]-styrene
• CAS: 1427270-56-1
• 化学式: C₇₀H₉₆O₆
• 分子量: 1033.53
• InChiKey: JTHPOXNFKPDUOF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  21.38
• 重原子数：
  76.0
• 可旋转键数：
  43.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.51
• 拓扑面积：
  71.06
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为产物：
  描述：

  4,4'-二羟基联苯 、 硬脂基溴 在 4-二甲氨基吡啶 、 potassium carbonate 作用下， 以 四氢呋喃 为溶剂， 反应 26.0h， 生成 2,5-bis[(4'-octadecyloxybiphenyl)oxycarbonyl]-styrene
  参考文献：
  名称：

  Synthesis and liquid crystalline behavior of 2,5-disubstituted styrene-based random copolymers: Effect of difference in length of the rigid core on the mesomorphic behavior of mesogen-jacketed liquid crystalline polymers

  摘要：

  A series of binary copolymers, poly{2,5-bis[(4-octadecyloxyphenyl)oxycarbonyl]-styrene-co-2,5-bis[(4'-octadecyloxybiphenyl)oxycarbonyl]-styrene} (poly(M-OC18-co-M-C18)), were synthesized via free radical polymerization. The random nature of the copolymers was expected on the basis of the assumed similar reactivities because of the analogous monomers. A combination of differential scanning calorimetry (DSC), polarized optical microscopy (POM) and wide-angle X-ray diffraction (WAXD) demonstrated that phase behavior of this series of copolymers were strongly composition dependent. The P-OC18 formed smectic A phase, re-entrant isotropic phase and column nematic phase, while the P-C18 only exhibited the stable smectic A phase. The comparison between P-OC18 and P-C18 indicates that the length of the rigid core is crucial to determine the liquid crystalline (LC) structures. After copolymerization, the glass transition temperature and the phase transition temperature of the copolymers from smectic phase to isotropic phase both increased with the molar fraction of 2,5-bis[(4'-octadecyloxybiphenyl)oxycarbonyl]-styrene (M-C18) in feed. In addition, when the feed was below 0.3, a column nematic phase was observed in high temperature. Namely, simply through copolymerization, we can greatly vary LC behavior of the mesogen-jacketed liquid crystalline polymers. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.polymer.2013.04.056

文献信息

• Synthesis of mesogen-jacketed liquid crystalline polymers with long symmetry mesogenic core containing two biphenyls
  作者：Sheng Chen、Hang Luo、He-Lou Xie、Hai-Liang Zhang

  DOI：10.1016/j.polymer.2013.01.048

  日期：2013.3

  A series of mesogen-jacketed liquid crystalline polymers, poly 2,5-bis[(4-alkoxybiphenyl)oxycarbonyl]-styrenes} (P-Cm, m = 8, 10, 12, 14 and 18) were designed and successfully synthesized via free radical polymerization. The chemical structures of the monomers were confirmed by 1H NMR, 13C NMR and Mass Spectrometry. The molecular characterizations of the polymers were performed with 1H NMR, GPC and

  设计并成功合成了一系列介晶夹层液晶聚合物，聚2,5-双[（4-烷氧基联苯）氧羰基]-苯乙烯}（P-Cm，m = 8、10、12、14和18）通过自由基聚合。单体的化学结构通过1 H NMR，1 3 C NMR和质谱确认。用1对聚合物进行分子表征1 H NMR，GPC和TGA。通过包括DSC，POM，温度可变FT-IR光谱，一维WAXD和SAXS在内的技术组合研究了聚合物的相结构和转变。实验结果表明，具有两个联苯的对称介晶核的聚合物可以发展为明确的近晶A（S A）相。这意味着可以通过简单地改变介晶基团的长度，将MJLCPs分子的形状从棒状变为带状。