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Laterally substituted biphenyl benzoates - synthesis and mesomorphic properties
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SYSNO ASEP 0541639 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Laterally substituted biphenyl benzoates - synthesis and mesomorphic properties Author(s) Cigl, Martin (FZU-D) RID, ORCID
Hampl, F. (CZ)
Svoboda, J. (CZ)
Podoliak, Natalia (FZU-D) RID, ORCID
Stulov, Sergey (FZU-D) ORCID
Kohout, M. (CZ)
Novotná, Vladimíra (FZU-D) RID, ORCID, SAINumber of authors 7 Source Title Liquid Crystals. - : Taylor & Francis - ISSN 0267-8292
Roč. 48, č. 4 (2021), s. 526-536Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords biphenyl benzoates ; lateral substitution ; nematics ; smectic phases Subject RIV CC - Organic Chemistry OECD category Organic chemistry R&D Projects EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA18-14497S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000550969600001 EID SCOPUS 85088471929 DOI 10.1080/02678292.2020.1794069 Annotation We have synthesised several series of dialkoxy-terminated biphenyl benzoates with lateral substituents (F, Cl) in the vicinity of the ester linking group, varying the length of the terminal alkyl chains. The aim was to study mesomorphic properties of these new compounds and compare them with the previously reported analogous phenyl biphenylcarboxylates, which possess reverse orientation of the ester linking group. The studied compounds were characterised by differential scanning calorimetry, polarising optical microscopy and birefringence measurements. For selected homologues, the type of mesophases was confirmed by x-ray scattering analysis. We calculated the dipole moments and suggested its correlation with the preference of tilted smectic phases in studied biphenyl benzoates. Generally, lateral substitution causes the drop of phase transition temperatures as well as melting points, giving rise to mesophases in a wide temperature range, in several cases down to the room temperature. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1080/02678292.2020.1794069
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