Synthesis, chiral separation and physical properties of the cinnamic acid derivatives exhibiting short-pitch cholesteric and TGB phases

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00616703" target="_blank" >RIV/68378271:_____/24:00616703 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0363684" target="_blank" >https://hdl.handle.net/11104/0363684</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/02678292.2024.2311277" target="_blank" >10.1080/02678292.2024.2311277</a>

Result language
angličtina
Original language name
Synthesis, chiral separation and physical properties of the cinnamic acid derivatives exhibiting short-pitch cholesteric and TGB phases
Original language description
Two new photosensitive chiral liquid crystalline materials derived from cinnamic acid were synthesised in (R) and (S) enantiomer forms. High optical purity was reached for all enantiomers. The enantiomer elution order was confirmed by the analysis of non- racemic (R) and (S) mixed samples. Sample irradiation was performed to realise E-Z isomerisation and investigate its effect on the enantioseparation. The conditions of the enantioselective HPLC method were optimised to achieve a baseline separation for all studied materials both before and after irradia-tion by the UV light. The mesogenic properties of the studied enantiomers and their racemic mixtures were obtained from differential scanning calorimetry measurements, optical textures observed under the polarising light microscope and X-ray diffraction measurements. Cholesteric and TGB phases have been found for the enantiomers and, analogously, nematic and smectic phases have been confirmed for their racemates.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10406 - Analytical chemistry

Project
<a href="/en/project/GA22-16499S" target="_blank" >GA22-16499S: Chirality as a tool for controlling photoresponsiveness of supramolecular arrangements</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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