Abstract
The lower homologues (n/m ≤ 5) of Schiff base mesogenic compounds, obtained by placing the electro-negative oxygen atom at the bridging site to the essential rigid core, are synthesized, and investigated by polarized-light thermal microscopy and differential scanning calorimetry. The influence of oxygen atoms, to the extent of increase of thermal range, depression in melting temperatures, elevation of clearing temperatures and quenching of liquid crystalline phases, is presented as a function of contributions to the longitudinal dipole moment of the molecule.
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