Photoinduced Optical Anisotropy in New Polymers containing Azobenzene Side Groups

Author:

Sava Ion1,Bruma Maria1,Köpnick Thomas2,Sapich Beate2,Wagner Jürgen2,Schulz Burkhard3,Stumpe Joachim4

Affiliation:

1. `Petru Poni' Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, Iasi 700487, Romania

2. Institute of Thin Film and Microsensoric Technology, Kantstr. 55, Teltow 14513, Germany

3. University of Potsdam, Institute of Physics, Am Neuen Palais 10, Potsdam 14469, Germany

4. Fraunhofer Institute for Applied Polymer Research, Geiselbergstr. 69, Golm, 14476, Germany

Abstract

A series of new photosensitive polymers have been synthesized by polycondensation reaction of 2,2-bis{3-amino-4-[( p-oxyhexyloxy- p'-butoxy)azobenzene]-phenylene}-hexafluoropropane or 2,2-bis{3-amino-4-[( p-oxybutyloxy- p'-phenyl)azobenzene]-phenylene}-hexafluoropropane with hexafluoroisopropylidene diphthalic anhydride or with a diacid chloride containing hexafluoroisopropylidene or dimethylsilane groups. These amorphous polymers have good solubility in organic solvents and good film-forming properties. The irradiation of polymer films with linearly polarized visible light causes a reorientation of the azobenzene groups by angular-selective E/Z photoisomerization. Thus, optical anisotropy is induced in the initially isotropic films. The photoinduced dichroism in the films was measured and the results are discussed with respect to the polymer structure.

Publisher

SAGE Publications

Subject

Materials Chemistry,Organic Chemistry,Polymers and Plastics

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