Unification of azo-polymer systems by photo-induced molecular movement

Zouheir Sekkat; Andre Knoesen; Wolfgang Knoll; Robert D. Miller

doi:10.1117/12.279824

29 July 1997 Unification of azo-polymer systems by photo-induced molecular movement

Zouheir Sekkat, Andre Knoesen, Wolfgang Knoll, Robert D. Miller

Proceedings Volume 10290, Sol-Gel and Polymer Photonic Devices: A Critical Review; 102900H (1997) https://doi.org/10.1117/12.279824
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We review our recent research in the field of photochromic polymeric structures for optical data storage and nonlinear optics. We unify some of the sub-themes of azopolymer structures in the light of photo-induced movement of azobenzene molecules. In particular, we discuss photo-induced effects in supramolecular assemblies containing azobenzene molecules (e.g. Langmuir-Blodgett-Kuhn structures and ultrathin silane layers). Reorientation of azobenzenes in these structures will be compared to that observed in spin-cast films. Photoisomerization and photo-induced orientation of azobenzene molecules is also studied at the molecular level by means of azosilane molecules chemisorbed on Silicon Oxide substrates. We establish a correlation between polymer architecture and sub-glass transition temperature (Tg) light-induced molecular movement in high Tg nonlinear optical azo-polyimide polymers. We show that the isomerization reaction itself depends on the polymer molecular structure, and we present evidence of light-induced molecular movement 325 °C below Tg of a rigid NLO azopolyimide polymer containing no flexible connector or tether.

Citation Download Citation

Zouheir Sekkat, Andre Knoesen, Wolfgang Knoll, and Robert D. Miller "Unification of azo-polymer systems by photo-induced molecular movement", Proc. SPIE 10290, Sol-Gel and Polymer Photonic Devices: A Critical Review, 102900H (29 July 1997); https://doi.org/10.1117/12.279824

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