Abstract
We synthesized twin dimers (TDs) with different linking groups between a mesogenic group and a flexible spacer, different spacer length, and different terminal alkyl chain length to clarify the effect of these groups on the mesomorphic properties of the TDs. A remarkable odd–even effect on the phase transition temperatures and nematic–isotrophic phase transition entropy changes was observed for the TDs with different spacer length. Liquid crystallinity of TDs with ester linking group was superior to that of TDs with ether linking group. Length of terminal group played an important role in exhibiting a smectic phase for TDs with ester linking group.
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