17.  New Compound with Potential Liquid Crystal Properties. III. Synthesis, Characterization and Mesomorphic ordering of N,n-bis-[4-(4-octyloxy-benzoic)-ester-benzyliden-n-propyl]-piperazine

Authors: Liliana Cseh, C. Csunderlik, Otilia Costisor


Abstract:

The synthesis of Schiff base - N,N-bis-[4-(4-octyloxy-benzoic)-ester-benzyliden-n-propyl]-piperazine (4) in a multistep process is repported. The last step involves the condensation of 4-octyloxy-benzoic acid 4-formyl-phenyl ester aldehyde (3) with 1,4- bis(3-aminopropyl)piperazine. The intermediates as well as the product were characterized by elemental analysis, melting point and IR, 1H and 13C-NMR spectroscopies. The potential mesogenic property of (4) has been checked with a polarising microscope equipped with a heating stage.


Keywords: Schiff base, liquid crystals, spectral properties

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