Reorientation Dynamics of Chromophores in Photosensitive Polymers by Means of Coarse-Grained Modeling

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim..

We study the photoisomerization of azobenzene chromophores embedded into a polymer matrix by using coarse-grained simulations. Two types of beads are considered: t- and c-beads, which are rich in trans and cis isomers, respectively. Simulations combine deterministic (molecular dynamics) and stochastic (random-type switching) parts. The ratio between the characteristic times for photoinduced reorientation and for orientation relaxation is tuned to be of the order found in experiments. The essential features of the phenomenon: 1) the existence of a stationary state, and 2) anisotropic distribution of the orientations of t-beads (orientation hole-burning effect), are reproduced. We study population dynamics of c-beads and the strength of the orientation hole burning, depending on the illumination wavelength and its intensity. The form of the reorientation potential of the mean force acting on the t-beads is analyzed and its use is validated.

Medienart:

E-Artikel

Erscheinungsjahr:

2015

Erschienen:

2015

Enthalten in:

Zur Gesamtaufnahme - volume:16

Enthalten in:

Chemphyschem : a European journal of chemical physics and physical chemistry - 16(2015), 15 vom: 26. Okt., Seite 3180-9

Sprache:

Englisch

Beteiligte Personen:

Ilnytskyi, Jaroslav M [VerfasserIn]
Saphiannikova, Marina [VerfasserIn]

Links:

Volltext

Themen:

Azobenzene
Chromophores
Journal Article
Molecular dynamics
Photoisomerization
Photosensitive polymers

Anmerkungen:

Date Completed 21.01.2016

Date Revised 22.10.2015

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1002/cphc.201500500

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM251822664