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Abstract
The synthesis of new di-Schiff bases with two non-mesogenic units and a flexible central spacer (‒CH2‒CH2‒) in their structure is reported. The mesomorphic properties of the compounds were investigated by differential scanning calorimetry (DSC) and polarizing microscopy.
The Schiff bases derived from the aldehydes were mesogenic while those derived from the ketones were not. A comparative study of their different mesogenic behavior was carried out to establish the influence of molecular structure on liquid crystal properties.