Photoreactive thin films of azobenzene-derivatized poly(amic acid) and poly(imide) Langmuir-Blodgett-Kuhn multilayer assemblies

被引:5
|
作者
Zong, Y
Hees, U
Knoll, W
Rühe, J
机构
[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
[2] Univ Freiburg, IMTEK, D-79110 Freiburg, Germany
关键词
poly(amic acid); poly(imide); Langmuir/Blodgett/Kuhn multilayer assemblies; liquid crystal alignment; command layer; surface plasmon optics; waveguide spectroscopy;
D O I
10.1142/S0218863502001127
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Various poly(amic acid)s with azobenzene-chromophore sidegroups have, been synthesized and structurally and functionally characterized. Their amphiphilic properties allowed us to prepare stable monomolecular layers at the water/air interface of a Langmuir trough, and to transfer these highly organized monolayers to solid supports via the Langmuir-Blodgett-Kuhn deposition protocol. The resulting multilayer assemblies were investigated by surface plasmon- and waveguide-optical techniques, by X-ray reflectometry, and by UV-vis and IR spectroscopies. Thermal imidization of the assemblies resulted in functional poly(imide) multilayers that still could undergo photoisomerization reactions in their azobenzene sidegroups. The kinetic parameters of this trans-cis and cis-trans isomerization, respectively, as well as, the resulting control of the alignment of a liquid crystal in contact to these "command layers" were evaluated.
引用
收藏
页码:367 / 389
页数:23
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