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Photo-orientation processes in liquid crystalline polymethacrylates with side azobenzene groups having lateral methyl substituents
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SYSNO ASEP 0548917 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Photo-orientation processes in liquid crystalline polymethacrylates with side azobenzene groups having lateral methyl substituents Author(s) Boychuk, A. (RU)
Shibaev, V. (RU)
Cigl, Martin (FZU-D) RID, ORCID
Pomeisl, Karel (FZU-D) ORCID
Hamplová, Věra (FZU-D) RID, ORCID, SAI
Pociecha, D. (PL)
Bubnov, Alexej (FZU-D) RID, ORCID, SAI
Bobrovsky, A. (RU)Number of authors 8 Source Title Macromolecules. - : American Chemical Society - ISSN 0024-9297
Roč. 54, č. 22 (2021), s. 10499-10509Number of pages 11 s. Language eng - English Country US - United States Keywords azobenzene ; liquid crystalline polymers ; photoorientation ; E-Z isomerization Subject RIV JJ - Other Materials OECD category Polymer science R&D Projects GC20-22615J GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000744116200025 EID SCOPUS 85119047736 DOI 10.1021/acs.macromol.1c01637 Annotation Design of new photoactive materials exhibiting nano-organization aimed for smart practical applications remains an actual and highlighted task. Synthesis and comparative study of chiral LC polymethacrylates with azobenzene groups were carried out to contribute to better understanding of the structure-property relationship. The effect of chirality and length of spacer of the terminal alkyl groups on the photooptical properties were established. The presence of lateral methyl substituent in the photochrome/mesogen fragment leads to a significant decrease of isotropization temperature. The photoorientation processes under illumination with the polarized visible light (457 nm) are studied for amorphousized films. It was found that an increase in the spacer length leads to an increase in the value of photoinduced dichroism (ΔD=0.28). Chirality plays significant role on relaxation behavior of the irradiated enantiopure and racemic films of polymer with long spacer and alkyl tail. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1021/acs.macromol.1c01637
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