Synthesis and mesomorphism of novel chalconyl esters with a lateral nitro group

ABSTRACT

A new chalconyl homologous novel series with lateral nitro group: 4-(3-4-(heptyloxy)phenyl) acryloyl-2^/-nitro phenyl 4′-alk oxy benzoate have been synthesized and all the members are differed by the terminal chain length C_nH_2n+1, where n = 1,2,3,4,5,6,7,8,10,12,14,16,18. Their transition temperatures and mesophase characteristics are studied with the help of polarizing optical microscope (POM). All 13 homolog of series except the C₁–C₄ are enantiotropically mesogenic. The molecular structures have been confirmed by the analytical techniques of NMR, IR, and elemental analysis.

GRAPHICAL ABSTRACT

KEYWORDS:

• Liquid Crystal
• Smectic
• Nematic
• Mesophase
• Chalconyl ester

Acknowledgments

Authors acknowledge thanks to Dr. R. R. Shah, principal of K. K. Shah Jarodwala Maninagar Science College, Ahmedabad. Authors thank to NFDD Centre for the analytical and spectral services.