Ellagic acid derivatives: a new mesogenic series exhibiting a thermotropic cubic mesophase
Ellagic acid derivatives: a new mesogenic series exhibiting a thermotropic cubic mesophase
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鞣花酸衍生物：具有热致立方中间相的新介晶系列
DOI：
10.1051/jphys:01989005005053900
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Z. Luz
中科院分区：
文献类型：
--
作者：
J. Billard;H. Zimmermann;R. Poupko;Z. Luz
2014年合成了从辛酰基到十六酰基的四正烷酰氧基鞣花酸系列的九个成员，并通过量热法和光学显微镜进行了研究。辛酰氧基和壬酰氧基衍生物不是介晶的，而其他同系物则表现出高度有序的双折射对映中间相。其中，具有最长侧链的五个成员另外表现出单向光学各向同性，因此表现出立方中间相。从混溶性研究来看，这种立方相（我们将其命名为 CD）与之前在非手性热致介晶中发现的其他立方中间相不同。这种单向CD中间相可以在室温下维持亚稳态数周。 J. Phys。 France 50 (1989) 539-547 ler MARS 1989，分类物理文摘 61.30 v
2014 Nine members of the tetra-n-alkanoyloxy ellagic acid series, ranging from the octanoyl to hexadecanoyl were synthesized and studied by calorimetry and optical microscopy. The octanoyloxy and nonanoyloxy derivatives are not mesogenic, while the other homologues exhibit a highly organized birefringent enantiotropic mesophase. Of these the five members with the longest side chains exhibit in addition a monotropic optically isotropic, and consequently, a cubic mesophase. From miscibility studies it appears that this cubic phase, which we name CD, is different from other cubic mesophases previously identified in non-chiral thermotropic mesogens. This monotropic CD mesophase can be maintained at room temperature in a metastable state for several weeks. J. Phys. France 50 (1989) 539-547 ler MARS 1989, Classification Physics Abstracts 61.30 v