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Geometric aspects influencing N-NTB transition - implication of intramolecular torsion |
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| Authors: | Andreja Lesac Ute Baumeister Irena Dokli Zdenko Hamer?ak Trpimir Iv?i? Darko Kontrec |
| Institution: | 1. Division of Organic Chemistry and Biochemistry, Ru?er Bo?kovi? Institute, Zagreb, Croatiaalesac@irb.hr;3. Institute of Chemistry, Physical Chemistry, Martin Luther University Halle-Wittenberg, Halle, Germany;4. Division of Organic Chemistry and Biochemistry, Ru?er Bo?kovi? Institute, Zagreb, Croatia |
| Abstract: | 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 (NTB) 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 NTB phase and can be regarded as the basic structural requirements for design of new twist-bend nematogen materials. |
| Keywords: | Bent-shape dimers structure-property correlation linking group conformations NTB phase |