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Experimental study reveals mesomorphic properties in liquid crystals with variable alkoxy chains, indicating structural influences on phase formation.
A homologous series of seven compounds containing a central azo-ester linkage, an acetyl group at the right terminal end, and a variable alkoxy chain at the left terminal end was synthesized and characterized. Structural confirmation was achieved through elemental analysis and spectroscopic techniques (IR, 1H NMR, and 13C NMR). Mesomorphic properties were studied using polarizing optical microscopy with a heating stage. The compounds exhibited smectic C and nematic phases with characteristic threaded and schlieren textures. Their mesomorphic behavior was also compared with structurally related series to understand the influence of terminal and lateral substituents on mesophase formation.
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Patel et al. (2026) studied this question.
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