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Polarization Dependent Photoinduced Supramolecular Chirality in High-Performance Azo Materials

Bagatur, Sekvan
Schlesag, Marcel
Fuhrmann-Lieker, Thomas

Here, we will show photo-induced supramolecular chirality in thin films of achiral amorphous polymers with azo groups in their side-chain. A matter of particular interest is the effect of various film thicknesses on azimuthal rotation and ellipticity of incident/transmitted polarized light. Furthermore, we investigated the temporal stability of inscribed chirality. By polarimetric measurements, we found out that the azimuthal rotation gets higher with layer thickness. In this scope, we were able to measure a very high azimuthal rotation of Δψ/d=112.5∘/μm. The inscribed chirality was stable for several days. Furthermore, we investigated the time-resolved behavior of incident and transmitted polarization ellipticities for various thicknesses. The time dependency may be explained by a two-step process: (1) fast trans-cis-isomerization resulting in photo-orientation and (2) slow photo-induced mass flow.

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Gefördert durch den Publikationsfonds der Universität Kassel
Citation
In: Molecules Volume 26 / Issue 10 (2021-05-11) , S. ; eissn:1420-3049
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Namensnennung 4.0 International
Except where otherwised noted, this item's license is described as Namensnennung 4.0 International
@article{doi:10.17170/kobra-202105183911,
  author    ={Bagatur, Sekvan and Schlesag, Marcel and Fuhrmann-Lieker, Thomas},
  title    ={Polarization Dependent Photoinduced Supramolecular Chirality in High-Performance Azo Materials},
  keywords ={540 and Azoverbindungen and Supramolekül and Chiralität  and Polarimetrie and Polarisiertes Licht},
  copyright  ={http://creativecommons.org/licenses/by/4.0/},
  language ={en},
  journal  ={Molecules},
  year   ={2021-05-11}
}