高等学校化学学报

高等学校化学学报

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含甲氧基偶氮苯基元的苯甲酸衍生物的合成与液晶性研究

白炳莲, 李敏
   

  1. 吉林大学汽车材料教育部重点实验室, 吉林大学材料科学与工程学院, 长春 130012
  • 收稿日期:2005-12-16 修回日期:1900-01-01 出版日期:2006-09-10 发布日期:2006-09-10
  • 通讯作者: 李敏

Synthesis and Liquid Crystalline Behaviour of Benzoic Acid Derivatives Containing Methoxyazobenzene

BAI Bing-Lian, LI Min
   

  1. Key Laboratory for Automobile Materials of Ministry of Education, College of Materials Sciences and Engineering, Jilin University, Changchun 130012, China
  • Received:2005-12-16 Revised:1900-01-01 Online:2006-09-10 Published:2006-09-10
  • Contact: LI Min

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被引次数

7

摘要： 合成和表征了新型的含有甲氧基偶氮苯液晶基元的3,4,5-三取代苯甲酸衍生物Dn, 研究了结构对其相行为的影响. 结果表明, 在Dn中, 羰基(C=O)和羟基(OH)之间的氢键相互作用存在于结晶态、液晶态和各向同性状态, 在各向同性态时氢键较弱. 通过对其分子结构的调控, 有效地抑制了微相分离和强的分子间的相互作用, 得到了具有单向向列型液晶行为的3,4,5-三取代的苯甲酸衍生物.

关键词: 氢键, 甲氧基偶氮苯, 超分子, 苯甲酸衍生物 

Abstract: A novel type of H-bonded liquid crystals, namely 3,4,5-{4-[(4-methoxy-phenyl)-azo]-phen-oxy}-alkoxy-benzoic acid(Dn, n=3,6,10), was synthesized and characterized. The FT IR spectra of D10 in the range of 1670—1650 cm-1 at different temperatures were examined. The results show that the carboxyl acid groups in D10 are associated to form intermolecular double hydrogen bonding between —C=O and —OH groups in crystalline up to the isotropic phase. The benzoic acid derivatives exhibiting nematic phase were obtained through molecular design by preventing segregation and modulating intermolecular interactions effectively.

Key words: Hydrogen bonds, Methoxyazobenzene, Supramolecule, Benzoic acid derivative

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