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Citation: ZHENG Shi-Jun, ZHANG Xiao-Jing, ZHANG Shu-Yuan, WANG Shu-Hong, HAN Gai-Ge, LI Zi-Fa. Synthesis of Azo Type Liquid Crystalline Crown Ethers Containing Dibenzo-18-crown-6 Unit[J]. Chinese Journal of Applied Chemistry, ;2006, 23(1): 12-17. shu

Synthesis of Azo Type Liquid Crystalline Crown Ethers Containing Dibenzo-18-crown-6 Unit

1.
a College of Materials Engineering, Zhengzhou University, Zhengzhou 450052;
2.
b Department of Chemistry, Zhengzhou University, Zhengzhou 450052

Corresponding author: LI Zi-Fa,
Received Date: 25 April 2005
Available Online: 4 July 2005
Fund Project: 国家自然科学基金(29974026) (29974026)河南省自然科学基金(0211021100) (0211021100)河南省教育厅自然科学基金(20021500004)资助项目 (20021500004)

A series of novel azo type crown ether liquid crystallines was synthesized from intermediates 4'-n-alkoxylbiphenyl-4-carboxylic acids and cis (trans)-4, 4'-bis (4-hydroxyphenylazo) dibenzo-18-crown-6 in yields of 91.7%~95.8% and their structures and properties were characterized by means of elemental analysis,¹H NMR, UV-vis, IR, MALDI-TOF-MS, DSC, polarizing optical microscope with a heating stage and X-ray diffraction techniques.It was found that the end products 4Ⅰ and 4Ⅱ formed liquid crystalline phases when heated to their melting points.In their liquid crystalline state, the typical smectic phase and nemetic phase textures(4ⅡD) can be observed.For compounds 4Ⅰ and 4Ⅱ, both melting poinT(T_m) and isotropization temperature (T_i) were decreased with the increase of the carbon numbers in the end alkoxy groups.However, the temperature range of liquid crystal phase was relatively wide.
- azo type,
- crown ether,
- thermotropic liquid crystal,
- synthesis
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Synthesis of Azo Type Liquid Crystalline Crown Ethers Containing Dibenzo-18-crown-6 Unit

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com