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Abstract
Two new homologous series of compounds with a heterocyclic ring having sulfur and oxygen as a hetero atom derived from p-hydroxy acetophenone and alkoxy aniline containing cinnamate-azomethine as central linkages have been synthesized. viz. 4(furalacryloxy) α-methyl benzylidine-4′-alkoxy aniline and 4(thianylacryloxy) α-methyl benzylidine-4′-alkoxy aniline. The compound of both the series have been characterized by elemental analysis, FT-IR, 1H-NMR, and mass spectrometry method. Their liquid crystalline properties have been investigated by optical polarizing microscopy and differential scanning calorimetry (DSC) studies. All the derivatives are mesomorphic in nature showing the nemetic phase. The mesomorphic properties of the present two series are compared with other structurally related series to evaluate the effect of thiophene and furan on mesomorphism.
Acknowledgment
We are grateful to Prof. R. A. Vora retired Prof. and Head, Department of Applied Chemistry, Faculty of Technology and Engineering, Kalabhavan, M. S. University of Baroda, Vadodara for his valuable suggestion. We are also thankful to CDRI Lucknow, I.I.T. Bombay, and SAIF Chandighar for providing facilities of elemental analysis, FT-IR, 1H-NMR, mass spectral, and thermal analysis.
Notes
*Monotropic phase
*This paper has been presented in ICFMAT, during 29–30th January, 2009 at Department of Physics, Velammal Engineering College, Ambattur – Redhills Road, Chennai – 600 066, Tamil Nadu, India.