Synthesis and mesomorphism of tetrafluoro substituted 4-cyano oligophenyls |
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| Authors: | Jakub Herman Ewelina Dmochowska Marta Pytlarczyk Piotr Harmata |
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| Institution: | 1. Faculty of Advanced Technologies and Chemistry, Military University of Technology, Warsaw, Polandjakub.herman@wat.edu.pl https://orcid.org/0000-0002-5549-7283;3. Faculty of Advanced Technologies and Chemistry, Military University of Technology, Warsaw, Polandhttps://orcid.org/0000-0003-4563-3082;4. Faculty of Advanced Technologies and Chemistry, Military University of Technology, Warsaw, Polandhttps://orcid.org/0000-0002-0880-3313;5. Faculty of Advanced Technologies and Chemistry, Military University of Technology, Warsaw, Polandhttps://orcid.org/0000-0003-2318-6293 |
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| Abstract: | ABSTRACTThe synthesis and characterisation of new liquid crystal (LC) compounds based on terphenyl core are described. New family of dielectrically positive compounds presents alternative molecular approach to the conventional LC design. Correlations between molecular structure and mesomorphic properties for compounds being cyano terminated analogues as well as other known from the literature have been drawn. Compounds are characterised by 1H NMR spectroscopy and mass spectrometry (electron ionisation) analysis. They show monotropic nematic behaviour in broad temperature range, confirmed by a polarising thermomicroscopy, differential scanning calorimetry. Detailed synthetic procedures are attached. Synthesised compounds stand as promising components of medium to highly birefringent liquid crystalline mixtures. |
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| Keywords: | Oligophenyl nematic organic synthesis birefringence |
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https://orcid.org/0000-0002-5549-7283;3. Faculty of Advanced Technologies and Chemistry, Military University of Technology, Warsaw, Poland