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学科主题: 物理有机化学
题名: Hydrogen bonded arylamide-linked cholesteryl dimesogenic liquid crystals: a study of the length and side chain effects
其他题名: 氢键稳定的线形芳酰胺连接的甾体二元液晶: 长度和侧链效应研究
作者: Wang GT(王贵涛) ; Zhao X(赵新) ; Li ZT(黎占亭)
通讯作者: 黎占亭
刊名: Tetrahedron
发表日期: 2011
卷: 67, 期:1, 页:48-57
收录类别: SCI
部门归属: 中科院上海有机化学研究所
英文摘要: Dimesogenic compounds 1a-c, 2a-i, and 3, that are composed of a hydrogen bonding-induced straight arylamide spacer and two appended cholesterol groups, have been designed and synthesized. The backbones of the rigid spacers of 1a-c, 2a-i, and 3 contain one, three, and five benzene units, which bear two, six, and ten alkoxyl (methoxyl, n-octoxyl, or n-dodecoxyl) groups, respectively. The thermal and optical properties of the compounds are investigated by using the differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and powder X-ray diffraction (PXRD) analysis. It is revealed that la c exhibit one or two liquid crystalline (LC) phases, 2a-i exhibit no, one or two LC phases, while 3 exhibits one LC phase in a wide temperature range. Generally, the more and longer alkoxyl chains facilitate the formation of the LC phases at low temperature. Notably, compound 2g, which bears two methoxyl and four dodecoxyl groups, displays a blue-red color change during both the heating and cooling cycle. The result illustrates that dimesogens with large rigid spacers can exhibit different LC phases when long aliphatic chains are appended to balance the strong stacking of the rigid backbones. (C) 2010 Elsevier Ltd. All rights reserved.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000285701600003
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/20889
Appears in Collections:物理有机化学研究室_期刊论文

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Recommended Citation:
Wang GT,Zhao X,Li ZT. Hydrogen bonded arylamide-linked cholesteryl dimesogenic liquid crystals: a study of the length and side chain effects[J]. Tetrahedron,2011,67(1):48-57.
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