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Title: Photochromic hybrid sol-gel materials - optical and dieelectric characterization
Authors: Serwadczak, Malgorzata
W├╝bbenhorst, Michael
Kucharski, Stanislaw #
Issue Date: 2005
Host Document: Proceedings of the XVIIth Conference Modification of Polymers
Conference: Conference Modification of Polymers edition:XVII location:Kudowa Zdrój date:12-15 September 2005
Abstract: The photochromic silica-based organic-inorganic hybrid materials containing cyanoazobenzene chromophores were investigated by optical and dielectric spectroscopy. These materials were obtained via sol-gel process. They were deposited on glass substrates by spin coating technique to provide thin transparent films. The UV-Vis spectroscopy showed reversibility of the trans-cis-trans isomerization of the chromophoric fragments. Molecular mobility in investigated materials were studied by means of dielectric spectroscopy. A variety of relaxation process is observed: the a -process and at room temperature the process related to the local movement of the azobenzene group. A correlation between dielectric and photochemical behaviour is discussed.
URI: 
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Soft Matter and Biophysics
# (joint) last author

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