Schiff base of 4-n-alkoxy-2-hydroxy benzaldehyde with 4-amino acetophenone and their Cu(II) complexes: synthesis, characterization and mesomorphic behavior

Abstract

New homologous series of Schiff’s base of 4-n-Alkoxy-2-hydroxy benzaldehyde (n = 2 to 8, 10, 12, 14, 16, 18) with 4-amino acetophenone and their Cu(II) metal complexes have been synthesized. The compounds were characterized using various spectroscopic techniques including FT-IR, ¹H-NMR, ¹³C-NMR. Mesomorphic properties of these compounds have been investigated with polarizing optical microscope and differential scanning calorimeter. These compounds exhibit wide range SmA phase as confirmed by their typical optical texture under polarizing microscope.

Keywords:

• Liquid crystal
• metallomesogens
• salicylaldimine
• Schiff base
• smectic-A phase

Acknowledgments

The authors are thankful to the Head, Department of Chemistry for providing the necessary facilities required to carry out this work. NMR and POM facilities from Department of Science and Technology under FIST program is gratefully acknowledged.

Additional information

Funding

We are thankful for the financial assistance from Research Project (No. RCC/Dir./2015/217/2) sanctioned by the Research & Consultancy Cell, The M.S. University of Baroda.