Photo-active liquid crystalline materials: effect of lateral substitution far from the chiral center

0584327 - FZÚ 2024 RIV CZ eng K - Conference Paper (Czech conference)
Mironov, Sergei - Suchánek, T. - Marhoul, J. - Cigl, Martin - Hamplová, Věra - Bubnov, Alexej
Photo-active liquid crystalline materials: effect of lateral substitution far from the chiral center.
Sborník příspěvků 12. Studentské vědecké konference fyziky pevných látek a materiálů. Praha: České vysoké učení technické, 2023 - (Aubrechtová Dragounová, K.; Kalvoda, L.; Čapek, J.; Kučeráková, M.), s. 48-55. ISBN 978-80-01-07255-4.
[Studentská vědecká konference fyziky pevných látek a materiálů /12./. Nové Hrady (CZ), 04.09.2023-07.09.2023]
R&D Projects: GA ČR(CZ) GA22-16499S
Institutional support: RVO:68378271
Keywords : photosensitive chiral liquid crystal * lateral substitution * azobenzene * E-Z isomerization
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

Photosensitive liquid crystalline (LC) materials give a fascinating possibility to tune and control the optical properties of soft systems distantly by illumination by UV-Vis light. Lateral substitution on the molecular core is an effective tool to tune the behaviour of chiral LCs. The effect of lateral substitution (by F, Cl, Br and methyl group) on the self-assembling behaviour, several new LCs with substituents placed on the benzene ring far from the chiral centre are and studied. All compounds, with exception of Br-substituted one, possess the cholesteric phase. The photosensitive behaviour, in particular the conversion of the E-Z isomers, was studied in toluene solution by HPLC. The kinetics of the photo-isomerization was identified under illumination by UV light. Due to presence of a photo-active azo group these materials can be used as functional dopants for design of smart photo-active liquid crystalline mixtures targeted for various applications in optoelectronics.
Permanent Link: https://hdl.handle.net/11104/0352249