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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/GA22-16499S" target="_blank" >GA22-16499S: Chiralita jako nástroj kontroly fotosenzitivity supramolekulárního uspořádání</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Liquid Crystals

ISSN

0267-8292

e-ISSN

1366-5855

Svazek periodika

51

Číslo periodika v rámci svazku

13-14

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

2370-2380

Kód UT WoS článku

001156527100001

EID výsledku v databázi Scopus

2-s2.0-85184215180