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RESEARCH ARTICLE
Contents Vol 70(7)

Synthesis and Liquid Crystalline Properties of a New Homologous Series of 4,5-Disubstituted 2H-[1,2,3]-Triazoles via Azide-Chalcone Oxidative Cycloaddition Reaction

P. T. Sowmya A B and K. M. Lokanatha Rai A B
+ Author Affiliations
- Author Affiliations

A Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysuru, Karnataka 570006, India.

B Corresponding authors. Email: kmlrai@yahoo.com, ptsowmya8@gmail.com

Australian Journal of Chemistry 70(7) 764-768 https://doi.org/10.1071/CH16540
Submitted: 26 September 2016  Accepted: 5 December 2016   Published: 9 January 2017

Abstract

A new homologous series of 4,5-disubstituted 2H-[1,2,3]-triazole derivatives were synthesized from chalcones and sodium azide via oxidative cycloaddition reaction; CuI was used as catalyst. Flexibility in the synthesized molecules was provided by attaching straight alkoxy chains. The synthesized compounds were characterized by elemental analysis, and 1H NMR and 13C NMR and LC-MS spectroscopies . The stability and range of the mesophases increased with the length of the chain on the triazoles. The melting point, transition temperatures, and enantiotropic liquid crystal morphologies were determined by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) equipped with a hot stage.


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