Journal of Photochemistry and Photobiology A: Chemistry, volume 316, pages 75-87
Photo-optical properties of amorphous and crystalline films of azobenzene-containing photochromes with bent-shaped molecular structure
Publication type: Journal Article
Publication date: 2016-02-01
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 4.3
ISSN: 10106030, 18732666
General Chemistry
General Chemical Engineering
General Physics and Astronomy
Abstract
A comparative study of the photo-optical properties and the photo-orientation processes in thin films of the bent-shaped azobenzene-containing compounds with different molecular structure was performed. For this purpose three new compounds were designed and prepared: two of these compounds with a symmetric bent-shaped molecular structure incorporate two azobenzene chromophores with different length of alkyl chains (6 and 8 methylene units), the third bent-shaped compound possesses only one azobenzene fragment. The effect of molecular and supramolecular structure, thermal prehistory of the films, wavelengths of the excitation light on the photo-optical properties, photoorientation processes and films morphology was revealed. It was shown that UV-irradiation leads to E – Z isomerization of azobenzene fragments in both amorphousized and crystalline films of the synthesized substances. This process is partially suppressed in crystalline films, but, nevertheless, UV-irradiation of the bichromophoric compounds results in transition from crystalline to amorphous state and decrease in the surface roughness. Irradiation of amorphousized films with polarized visible and UV-light induces the photoorientation of chromophores in direction perpendicular to the polarization plane of the incident light. Relatively high values of photoinduced dichroism in the bent-shaped compounds (D ∼ 0.60–0.65) are comparable with other azobenzene-containing rod-shaped systems. Photoinduced isothermal melting and photoorientation processes could be served for the photo-optical data recording and storage.
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Bobrovsky A. et al. Photo-optical properties of amorphous and crystalline films of azobenzene-containing photochromes with bent-shaped molecular structure // Journal of Photochemistry and Photobiology A: Chemistry. 2016. Vol. 316. pp. 75-87.
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Bobrovsky A., Shibaev V., Hamplová V., Bubnov A., Novotná V., Kašpar M., Piryazev A., Anokhin D., Ivanov D. Photo-optical properties of amorphous and crystalline films of azobenzene-containing photochromes with bent-shaped molecular structure // Journal of Photochemistry and Photobiology A: Chemistry. 2016. Vol. 316. pp. 75-87.
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TY - JOUR
DO - 10.1016/j.jphotochem.2015.10.021
UR - https://doi.org/10.1016%2Fj.jphotochem.2015.10.021
TI - Photo-optical properties of amorphous and crystalline films of azobenzene-containing photochromes with bent-shaped molecular structure
T2 - Journal of Photochemistry and Photobiology A: Chemistry
AU - Bobrovsky, Alexey
AU - Hamplová, Věra
AU - Bubnov, Alexej
AU - Kašpar, Miroslav
AU - Piryazev, Alexey
AU - Anokhin, Denis
AU - Ivanov, Dimitri
AU - Shibaev, Valery
AU - Novotná, Vladimíra
PY - 2016
DA - 2016/02/01 00:00:00
PB - Elsevier
SP - 75-87
VL - 316
SN - 1010-6030
SN - 1873-2666
ER -
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@article{2016_Bobrovsky
author = {Alexey Bobrovsky and Věra Hamplová and Alexej Bubnov and Miroslav Kašpar and Alexey Piryazev and Denis Anokhin and Dimitri Ivanov and Valery Shibaev and Vladimíra Novotná},
title = {Photo-optical properties of amorphous and crystalline films of azobenzene-containing photochromes with bent-shaped molecular structure},
journal = {Journal of Photochemistry and Photobiology A: Chemistry},
year = {2016},
volume = {316},
publisher = {Elsevier},
month = {feb},
url = {https://doi.org/10.1016%2Fj.jphotochem.2015.10.021},
pages = {75--87},
doi = {10.1016/j.jphotochem.2015.10.021}
}
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