The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

  
       
         
    STUDIA CHEMIA - Issue no. 4 / 2011  
         
  Article:   ASYMMETRIC BENT-CORE LIQUID CRYSTALS BASED ON 1,3-BIS-(4-HYDROXYPHENYLAZO)BENZENE CENTRAL CORE.

Authors:  . 		 
       
         
  Abstract:  The paper presents the synthesis and liquid-crystalline properties of some new asymmetric bent-core compounds based on a 1,3-bis-(4`-hydroxyphenylazo)benzene central core. The first class of asymmetric derivates were obtained by esterification of some hockey-stick derivates with 4-methoxybenzoic acid and the second one by estherification with 3-bromo-4-methoxybenzoic acid, in the presence of 4-dimethylaminopyridine (DMAP) and N,N''-dicyclohexyl-carbodiimide (DCC). The liquid crystalline properties were investigated by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). The first class evidenced enantiotropic liquid crystalline properties, while the second one presented monotropic liquid crystalline behavior.

Keywords: liquid crystals, asymmetric bent-core compounds 		 
         
     
         
         
      Back to previous page