The effect of position of octadecyloxy tail on the formation of liquid crystal with chalconyl-ester and chalconyl-vinyl ester series: Comparison with corresponding linkage group

• Published in: Molecular Crystals and Liquid Crystals Vol. 643; no. 1; pp. 216 - 232
• Main Authors: Solanki, R. B., Sharma, Vinay. S., Patel, R. B.
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 22-01-2017; Taylor & Francis Ltd
• Subjects: chalcone; Crystals; Differential scanning calorimetry; enantiotropy; Esters; Fourier transforms; Homology; Linkages; Liquid crystal; Liquid crystals; Molecular chemistry; Molecular structure; nematic; Phenyls; smectic; Spectroscopic analysis; Synthesis
• ISSN: 1542-1406; 1563-5287; 1527-1943
• DOI: 10.1080/15421406.2016.1272222

Two series of chalconyl-based liquid crystals which differ from each other in the position of the first linking group have been synthesized and characterized by elemental analyses and spectroscopic techniques such as Fourier transform infrared and proton magnetic resonance magnetic resonance [
1
H NMR] spectroscopy. The mesomorphic properties of these compounds were observed by optical polarized light microscopy (POM) and differential scanning calorimetry (DSC). We have synthesized two homologous series viz. 3-(3-(4-(Octadecyloxy) phenyl) acrylonyl) phenyl 3-(4-n-alkoxyphenyl) acrylate (series-1) and 3-(3-(4-(Octadecyloxy) phenyl) acryloyl) phenyl 4-n-alkoxy benzoate (series-2). Series-1 has chalconyl-ester central linkage group while in series-2 chalconyl-vinyl ester group is present and tail octadecyloxy side chain is common in both homologous series. All the homologous in present series display LC property in enantiotropical manner except first three homologous in both series.