Photochromic liquid crystalline structures containing azobenzene moieties |
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| Authors: | Martin Studenovský Zdenka Sedláková Geng Wang Stanislav Nešpůrek Krzysztof Janus Olexandr P. Boiko Francois Kajzar |
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| Affiliation: | 1. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 162 06 Prague, Czech Republic;2. Institute of Physical and Theoretical Chemistry, Technical University of Wroclaw, Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland;3. Institute of Physics, National Academy of Sciences of Ukraine, Prospekt Nauki 46, 03650 Kyiv, Ukraine;4. Commissariat à l'Energie Atomique, DRT-LIST, DECS/SEMM/LCO, CEA/Saclay, 91191 Gif-sur-Yvette, France |
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| Abstract: | Novel liquid crystalline photochromic materials of the type 4-R-C6H4-N=N-C6H4-O(CH2)n-N(CH2CH2OH)2, where R is NO2, H, CN, O-n-C8H17, phenyl, 4-O2NC6H4, were prepared. Some of them are photoconductive. These materials were used for the preparation of light-sensitive polymers in which the photoactive moieties were attached to polyurethane chain. Photochromism of these compounds is based on trans-cis isomerization of azobenzene group. An example of the photochromic activity is presented on solid solution of one material (R = O-n-C8H17, n = 5) in poly(methyl methacrylate) matrix. |
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| Keywords: | azobenzene liquid crystal photochromism photoconductivity |
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