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Effect of alkyl chain length in the terminal ester group on mesomorphic properties of new chiral lactic acid derivatives
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SYSNO ASEP 0462946 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of alkyl chain length in the terminal ester group on mesomorphic properties of new chiral lactic acid derivatives Tvůrce(i) Kohout, M. (CZ)
Bubnov, Alexej (FZU-D) RID, ORCID, SAI
Šturala, J. (CZ)
Novotná, Vladimíra (FZU-D) RID, ORCID, SAI
Svoboda, J. (CZ)Zdroj.dok. Liquid Crystals. - : Taylor & Francis - ISSN 0267-8292
Roč. 43, č. 10 (2016), s. 1472-1485Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova chiral liquid crystal ; lactic acid derivative ; terminal ester group ; mesomorphic properties ; dielectric spectroscopy ; layer shrinkage Vědní obor RIV JJ - Ostatní materiály CEP LD14007 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora FZU-D - RVO:68378271 UT WOS 000380850100020 EID SCOPUS 84966728680 DOI 10.1080/02678292.2016.1185170 Anotace Two series of new lactic acid derivatives with a terminal ester group have been synthesised. The effect of this ester unit and length of its alkyl chain on the mesomorphic and dielectric properties of the compounds exhibiting a broad temperature range of chiral smectic phases has been studied. We found, that the mesomorphic behaviour and phase transition temperatures are strongly affected by the molecular architecture. Depending on the alkyl chain length in the terminal ester unit, the studied materials exhibited a paraelectric smectic A*, ferroelectric tilted smectic C* and antiferroelectric smectic CA* phases over a broad temperature range. The homologues with short terminal alkyl chains showed a very small layer shrinkage on the transition from the orthogonal SmA* to the tilted SmC* phase, which is a characteristic feature of "de Vries-type" behaviour.
Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2017
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