Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: Focus: Functional Polymer Hybrids I
CPP 20.4: Vortrag
Dienstag, 8. März 2016, 10:30–10:45, H51
Photoisomerization kinetics in azobenzene-containing polymers — •Tatiana Petrova1,2, Jaroslav Ilnytskyi1,3, Vladimir Toshchevikov1, and Marina Saphiannikova1 — 1Leibniz-Institut für Polymerforschung Dresden e.V. — 2Cherepovets State University, Russia — 3Institute for Condensed Matter Physics, Lviv, Ukraine
Azobenzene-containing polymers belong to a class of smart materials, which are able to transform the light energy into mechanical stress [1, 2]. We study the photoisomerization kinetics in azobenzene-containing polymers using the coarse-grained simulations and a theoretical model for the kinetic processes. The reorientation of azobenzene chromophores under trans-cis and cis-trans isomerization processes are taken explicitly into account. It is shown that the population kinetics of trans- and cis-isomers and their stationary orientation states depend on the ratio between characteristic times which characterize the rotation diffusion of the isomers, the frequency of photoisomerization of trans-isomers and the time of cis-trans relaxation. The form of the reorientation potential of the mean force acting on the isomers is analyzed and its use is validated.
[1] T. Petrova et al. Soft Matter 11 (2015) 3412
[2] J. Ilnytskyi et al. ChemPhysChem 16 (2015) 3180