Photosensitive chiral self-assembling materials: significant effects of small lateral substituents

0463127 - FZÚ 2017 RIV GB eng J - Článek v odborném periodiku
Cigl, Martin - Bubnov, Alexej - Kašpar, Miroslav - Hampl, F. - Hamplová, Věra - Pacherová, Oliva - Svoboda, J.
Photosensitive chiral self-assembling materials: significant effects of small lateral substituents.
Journal of Materials Chemistry C. Roč. 4, č. 23 (2016), 5326-5333. ISSN 2050-7526. E-ISSN 2050-7534
Grant CEP: GA ČR GA16-12150S; GA MŠMT(CZ) LH15305
Institucionální podpora: RVO:68378271
Klíčová slova: liquid crystals * lateral substitution * azo group * isomerization
Kód oboru RIV: JJ - Ostatní materiály
Impakt faktor: 5.256, rok: 2016

Novel azobenzene-based photosensitive mesogens with lactate chiral unit were synthesized. In order to modify the rate of the thermal Z-E isomerization of these compounds, small lateral substituents were introduced into their core in the proximity of the azo group. The influence of lateral substitution on the kinetics of the Z-E isomerization, mesomorphic behaviour, and UV-Vis absorption spectra was studied. It was found that the position of the substituents in the azobenzene core significantly affects the rate of their thermal isomerization. The stability of Z-isomers of several studied compounds is comparable to that of compounds with a complex molecular structures designed for optical data storage. Although lateral substitution influences the breadth/length ratio of the core, liquid-crystalline properties of the studied materials have been preserved.
Trvalý link: http://hdl.handle.net/11104/0262401