Abstract

SYNTHESIS OF 4-(3-((4-HYDROXYBENZYL)OXY)3-OXOPROP-1-EN- 1-YL)PHENYL-4-N- ALKOXY BENZOATE

Mukesh L. Chauhan* and Jignesh M. Patel

Abstract

The titled homologous series consists of 11 members. The methyl to pentyl homologues are nonmesomorphic because of very high melting points, however, the hexyl to hexadecyl derivatives are enantiotropic nematic with absence of smectogenic. The texture of nematic mesophase is threaded or Schlieren. The nematic-isotropic transition curve of the phase diagram behaves in a normal manner. The transition temperatures of the series and liquid crystal properties are observed through optical polarizing microscopy and a hot stage. The novel materials were characterized by elemental analysis, infrared, and 1H NMR spectroscopy. Analytical data support the molecular structures. The liquid crystal properties of the novel series are compared with structurally similar homologous series. The novel series is entirely nematogenic with absence of smectic character and of a middle-ordered melting type. The nematic-isotropic thermal stability varies between around 1400C and 1750C.

Keywords: Anisotropic; liquid crystal; mesomorphic; nematic; smectic.