Lamellar To Lamellar Phase Transition Driven by Conformation Change of an Amphiphilic Liquid Crystal Oligomer
Lamellar To Lamellar Phase Transition Driven by Conformation Change of an Amphiphilic Liquid Crystal Oligomer
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DOI：
10.1021/cm071676x
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发表时间：
2007-11
影响因子：
8.6
通讯作者：
Akihisa Yamaguchi;Naoki Uehara;J. Yamamoto;A. Yoshizawa
中科院分区：
文献类型：
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作者：
Akihisa Yamaguchi;Naoki Uehara;J. Yamamoto;A. Yoshizawa
在制备了一种新型的具有六个氰基联苯部分和一个半全氟烷基链的两亲性液晶六聚体之后，我们使用光学显微镜、差示扫描量热法和X射线衍射来研究其物理性质。1，10-双{3，4，5-三[6-（4′-氰基联苯-4-基氧基）己氧基]苯甲酰氧基}-1H，1H，10 H，10 H-十七碳正癸烷的液晶低聚物显示出双层近晶A向插层近晶A的转变，并伴随着层间距的不连续减小。这种转变是由于其分子构象从折叠（或弯曲）到线性结构的变化。
After preparing a novel amphiphilic liquid crystal hexamer possessing six cyanobiphenyl moieties and a semiperfluorinated alkyl chain, we used optical microscopy, differential scanning calorimetry, and X-ray diffraction to investigate its physical properties. The liquid crystal oligomer, 1, 10-bis{3, 4, 5-tris[6-(4′-cyanobiphenyl-4-yloxy)hexyloxy]benzoyloxy}-1H,1H,10H,10H-heptadecafluorodecane, was found to exhibit a bilayer smectic A to intercalated smectic A transition accompanying a discontinuous decrease in layer spacings. The transition is attributable to a change in its molecular conformation from a folded (or bent) to a linear structure.