Cited 8 time in webofscience Cited 7 time in scopus

Photoreaction and molecular reorientation studies of ultra-violet light irradiated azobenzene containing polymer films using two-dimensional correlation infrared spectroscopy

Title
Photoreaction and molecular reorientation studies of ultra-violet light irradiated azobenzene containing polymer films using two-dimensional correlation infrared spectroscopy
Authors
Lee, SH[Lee, Sang Hyun]Chae, B[Chae, Boknam]Kim, HC[Kim, Hyun-Chul]Kim, SB[Kim, Seung Bin]Jung, YM[Jung, Young Mee]Lee, SW[Lee, Seung Woo]
DGIST Authors
Kim, HC[Kim, Hyun-Chul]
Issue Date
2010-06-16
Citation
Journal of Molecular Structure, 974(1-3), 35-39
Type
Article
Article Type
Article; Proceedings Paper
Keywords
2D Correlation AnalysisAzobenzene MoietyBenzeneChromophoresCorrelation MethodsElectron Beam LithographyElectron TransitionsFree Radical PolymerizationFree RadicalsHydrocarbonsInfrared SpectroscopyIR SpectroscopyIsomerizationIsomersLight Sensitive MaterialsMolecular ReorientationPhoto-Reactive PolymerPhotoisomerizationPhotopolymersPhotoreactivityPolymer FilmsPolymersSpectrum AnalysisTwo-Dimensional (2-D)
ISSN
0022-2860
Abstract
A photosensitive polymer with azobenzene side groups was synthesized from free radical polymerization and characterized. Photoreaction and photoinduced molecular reorientation was investigated in films of poly(4- methacryloyloxyazobenzene) (PMAAz) through ultraviolet (UV) absorption spectra and two-dimensional (2D) correlation analyses of their infrared (IR) spectra. The PMAAz polymer molecules were found to undergo trans-cis photoisomerization upon UV irradiation. The fraction of the cis-isomer of azobenzene increased with an increasing UV light exposure dose. The analysis of the 2D IR correlation spectra revealed that the isomerization of azobenzene chromophores induced molecular movement of azobenzene moiety as well as alkyl main chains in PMAAz films. The mono-substituted benzene ring changed sooner than the para-substituted benzene ring for trans-cis isomerization. The azobenzene chromophores in the PMAAz film induced the molecular reorientation by photoreaction in the following sequence: mono-substituted benzene ring → NΦ bond → cis-NN → para-substituted benzene ring. © 2010 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3513
DOI
10.1016/j.molstruc.2009.10.008
Publisher
Elsevier B.V.
Related Researcher
Files:
There are no files associated with this item.
Collection:
Magnetic-Controlled Materials Research Group1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE