Photoinduced Orientation of Azobenzene Groups in Polymer Films. Characterization by UV/Visible Spectroscopy

We study the kinetics of the photoinduced orientational ordering of two methacrylic polymers containing different azobenzene groups with both electron-donor and electron-acceptor substituents under irradiating them at two different wavelengths. For the experimental study of the orientational distrib...

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Bibliographic Details
Published inMolecular Crystals and Liquid Crystals Vol. 536; p. 354
Main Authors Nadtoka, Oksana, Syromyatnikov, Vladimir, Tarasenko, Vitaliy
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis Ltd 11.02.2011
Subjects
Chemical compounds
Electrons
Polymer films
Reaction kinetics
Spectrum analysis
Studies
Ultraviolet radiation
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Summary:We study the kinetics of the photoinduced orientational ordering of two methacrylic polymers containing different azobenzene groups with both electron-donor and electron-acceptor substituents under irradiating them at two different wavelengths. For the experimental study of the orientational distribution in polymer films, we use the method based on absorption measurements. It is found that azofragments are oriented by either the photoorientation or photoselection mechanism depending on the wavelength. The components of the order parameter tensor of azobenzene fragments are estimated for the initial state and after different doses of irradiation. [PUBLICATION ABSTRACT]
ISSN:1542-1406
1527-1943