Synthesis and study of mesomorphic properties of azoester compounds

ABSTRACT

In order to investigate the influence of the terminal substitution on mesomorphism, the newly synthesized homologues series based on azoester have been synthesized. The influence of the structure of the mesogenic core has been present in this study, effect of hydrocarbon chain length and flexibility at terminal side effect on mesomorphism was represents in this case. In this investigation, we represent a series consisting of thirteen (C₁–C₁₈) homologue. In which, C₁ to C₃ homologue are nonmesomorphic. While C₄–C₁₈ shows smectic as well as nematic mesophase enantiotropically. Analytical and spectral data confirmed the molecular structures of homologues. All these compounds were characterized by elemental analysis and Fourier transform infrared [FTIR] and ¹H NMR. Their mesomorphic properties were measured by optical polarized light microscopy and differential scanning calorimetry (DSC) and PXRD.

KEYWORDS:

• Mesophase
• nematic
• smectic
• azoester

Acknowledgments

Authors acknowledge thanks to Dr. Rutesh. R. Shah, principal of K. K. Shah Jarodwala Maninagar Science College, Ahmedabad. Authors are also thankful to Dr. A. V. Doshi, Ex-principal of M.V.M. Science & Home Sci. College - Rajkot for his constant support, inspirations, and help during the work, as and when needed during the course of present investigation. Authors thank to NFDD Centre for the analytical and spectral services.