Azobenzene‐containing LC polymethacrylates highly photosensitive in broad spectral range

DOI Web Site Web Site 被引用文献1件
  • Alexey Bobrovsky
    Faculty of Chemistry Moscow State University Leninskie Gory Moscow 119991 Russia
  • Valery Shibaev
    Faculty of Chemistry Moscow State University Leninskie Gory Moscow 119991 Russia
  • Martin Cigl
    Chemistry department, Institute of Physics, The Czech Academy of Sciences Na Slovance 1999/2, 182 21 Prague 8 Czech Republic
  • Vĕra Hamplová
    Chemistry department, Institute of Physics, The Czech Academy of Sciences Na Slovance 1999/2, 182 21 Prague 8 Czech Republic
  • Damian Pociecha
    Laboratory of Dielectrics and Magnetics, Chemistry Department Warsaw University Al. Zwirki I Wigury 101 Warsaw 02‐089 Poland
  • Alexej Bubnov
    Chemistry department, Institute of Physics, The Czech Academy of Sciences Na Slovance 1999/2, 182 21 Prague 8 Czech Republic

説明

<jats:title>ABSTRACT</jats:title><jats:p>Two photosensitive chiral liquid crystalline azobenzene‐containing polymethacrylates having different length of flexible spacer connecting chromophores with backbone were synthesized and their phase behavior and photo‐optical properties were studied. Both polymers consist of lateral methyl substituents in <jats:italic>ortho</jats:italic>‐position of azobenzene chromophores providing high photosensitivity even in red spectral region as well as high thermal stability of photoinduced <jats:italic>Z</jats:italic>‐form of azobenzene chromophores. It is shown, that smectic phase (SmA*) formation in films of polymer with longer spacer predetermines its quite unusual spectral response to UV and subsequent visible light actions. The SmA* phase promotes spontaneous homeotropic alignment of azobenzene chromophores in polymer films. UV‐irradiation induces not only <jats:italic>E‐Z</jats:italic> isomerization but also results in disruption of homeotropic alignment, whereas subsequent visible light action enables to obtain films with the low degree of chromophores orientation. The photo‐orientation phenomena under the action of polarized light of different wavelength on polymer films were studied. The possibility of using red polarized light of moderate intensity for optical photorecording on polymer films is demonstrated. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. <jats:bold>2016</jats:bold>, <jats:italic>54</jats:italic>, 2962–2970</jats:p>

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