Intriguing liquid crystalline behavior of liquid crystalline polyrotaxane containing azobenzene mesogens
Intriguing liquid crystalline behavior of liquid crystalline polyrotaxane containing azobenzene mesogens
复制标题
含有偶氮苯介晶的液晶聚轮烷的有趣液晶行为
DOI：
10.1007/s00289-010-0426-3
复制
发表时间：
2011
期刊：
影响因子：
3.2
通讯作者：
Hailiang Zhang
中科院分区：
文献类型：
--
作者：
Tianhui Hu;He;Li Chen;Sheng Chen;Hailiang Zhang
合成了一系列不同间隔基长度的偶氮苯液晶聚轮烷（AzoPR），研究了间隔基长度与液晶行为的关系。采用1H NMR、FT-IR和凝胶渗透色谱等手段对偶氮PR进行了表征。通过热重分析研究了其热稳定性。用差示扫描量热法、偏光显微镜和广角X射线衍射研究了它们的相结构和液晶性能。实验结果表明，间隔层长度为2和4的AzoPR没有显示出液晶行为，间隔层长度为6的AzoPR显示出柱状晶相。而当间隔层长度增加到11时，形成了柱状晶相，同时偶氮苯液晶基元形成了高度有序的液晶畴。
A series of liquid crystalline polyrotaxanes containing azobenzene mesogenic moieties (AzoPR) with different length of spacer were synthesized, and the relationship between the spacer length and the liquid crystalline behavior was investigated. The molecular characterization of the AzoPR was performed with1H NMR, FT-IR, and gel permeation chromatography. The thermal stability was investigated via thermogravimetric analysis. Their phase structures and liquid crystalline properties were studied by differential scanning calorimetry, polarized optical microscopy and wide-angle X-ray diffraction. The experimental results suggested that AzoPR with spacer length of 2 and 4 failed to show the liquid crystalline behavior, and AzoPR with spacer length of 6 showed the columnar nematic phase. However, when the spacer length increases to 11, the columnar nematic phase formed, meanwhile, the liquid crystalline domains with high ordered structure were developed by azobenzene mesogens.
影响因子：
4.3
作者：
Yui, Nobuhiko;Ooya, Tooru
通讯作者：
Ooya, Tooru