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    Geometric aspects influencing N-N<sub>TB</sub> transition - implication of intramolecular torsion

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    <p>Herein we report a comprehensive study on novel carbonyl- and ethenyl-linked symmetric dimers that combine synthesis, mesomorphic properties and molecular modelling. The study has been focused on the impact of geometry imposed by the linkage group on the incidence of the twist-bend nematic (N<sub>TB</sub>) phase. Comparison of the mesomorphic properties of these two series complemented with computational studies of conformational space around the linkage group points molecular curvature and intramolecular torsion plays important role in the appearance of the N<sub>TB</sub> phase and can be regarded as the basic structural requirements for design of new twist-bend nematogen materials.</p
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