Photo-orientation in azobenzene containing polybutadiene based polymer
Result description
The photochemical behavior of a liquid crystalline polymer based on HO-terminated telechelic polybutadiene Krasol LBH 3000 grafted with 5-(4-{[4-(octyloxy)phenyl]azo}phenoxy)pentane-1-thiol units was studied. The photochemically induced trans-cis-trans isomerization cycles of azobenzene groups resulted in their local reorientation upon irradiation with linearly polarized UV light of He-Cd laser. The irradiation led to a reorientation of the azobenzene chromophores perpendicular to the electric field vector and in this way to the induction of stable anisotropy represented by a maximum of dichroic ratio of 5.6 at 325 nm. The resulting dichroism and birefringence was quite stable.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Photo-orientation in azobenzene containing polybutadiene based polymer
Original language description
The photochemical behavior of a liquid crystalline polymer based on HO-terminated telechelic polybutadiene Krasol LBH 3000 grafted with 5-(4-{[4-(octyloxy)phenyl]azo}phenoxy)pentane-1-thiol units was studied. The photochemically induced trans-cis-trans isomerization cycles of azobenzene groups resulted in their local reorientation upon irradiation with linearly polarized UV light of He-Cd laser. The irradiation led to a reorientation of the azobenzene chromophores perpendicular to the electric field vector and in this way to the induction of stable anisotropy represented by a maximum of dichroic ratio of 5.6 at 325 nm. The resulting dichroism and birefringence was quite stable.
Czech name
Fotoorientace v polymerech typu polybutadienu obsahujících azobenzenovou skupinu
Czech description
Studovali jsme fotochemické chování kapalně-krystalického polymeru na bázi HO-terminovaného polybutadienu Krasol LBH 3000 modifikovaného bočními skupinami typu 5-(4-{[4-(octyloxy)fenyl]azo}fenoxy)pentan-1-thiol. Výsledkem fotochemicky indukovaných trans-cis-trans izomerizačních cyklů azobenzenových skupin byla jejich lokální reorientace po osvětlení lineárně polarizovaným UV světlem He-Cd laseru. Reorientace azobenzenových chromoforů byla kolmá k vektoru elektrického pole. Osvětlení indukovalo stabilníanisotropii charakterizovanou hodnotou dichroického poměru 5,6 při vlnové délce 325 nm.
Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Optoelectronics and Advanced Materials
ISSN
1454-4164
e-ISSN
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Volume of the periodical
7
Issue of the periodical within the volume
3
Country of publishing house
RO - ROMANIA
Number of pages
5
Pages from-to
1371-1375
UT code for WoS article
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EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
CD - Macromolecular chemistry
Year of implementation
2005