Liquid crystalline properties of copper(II) complexes derived from azo-containing salicylaldimine ligands
摘要:
The one-step metal promoted reaction between 5+4-alkoxyphenyl)azo) salicylaldehyde (alkoxy = decyloxy, dodecyloxy, tetradecyloxy) and ethanolamine in the presence of Cu(CH3COO) center dot 4H(2)O yields new salicylaldimine based copper(II) bis(chelates) as a result of the [I + 1] Schiff base condensation. The liquid crystalline character of these complexes was examined using differential scanning calorimetry (DSC) and a polarizing microscope equipped with a heating and cooling stage. All copper complexes form the enantiotropic Smectic C mesophase. (c) 2006 Elsevier Ltd. All rights reserved.