Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/52761
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Generation of anisotropic emission by light-induced orientation of liquid crystalline polymers |
Autor: | Rosenhauer, Regina; Stumpe, Joachim; Giménez Soro, Raquel CSIC ORCID ; Piñol, Milagros CSIC ORCID; Serrano, José Luis CSIC ORCID; Viñuales, Ana I.; Broer, Dirk, J. | Fecha de publicación: | 2011 | Editor: | American Chemical Society | Citación: | Macromolecules 44(6): 1438-1449 (2011) | Resumen: | Functionalized polymers containing mesogenic, photosensitive, and fluorescent side groups were synthesized for all-in-one films with anisotropic absorption and emission. Aligned films were prepared by a two-step bulk-alignment procedure combining a photochemical step at room temperature and a thermal aligning step at temperatures of the mesophases. The irradiation with linearly polarized light results in small values of anisotropy via angular-selective photoreactions of cinnamates, stilbenes, and anthracene moieties. The photoinduced anisotropy was significantly amplified by annealing above the glass transition temperature of the liquid crystalline polymers, resulting in a cooperative alignment of all side groups leading to dichroism values up to 0.7 (dichroic ratio up to 6.7) and ratios of anisotropic fluorescence up to 8. The irradiation conditions for the induction of anisotropy were optimized concerning wavelength and dose with respect to the absorption of photosensitive groups and the limited photostability of the dyes. Depending on the distribution of the photoproducts, alignment parallel or perpendicular to the electric field vector of the incident light was induced in dependence on the polymer composition and irradiation conditions. © 2011 American Chemical Society. | URI: | http://hdl.handle.net/10261/52761 | DOI: | 10.1021/ma102381v | Identificadores: | doi: 10.1021/ma102381v issn: 0024-9297 e-issn: 1520-5835 |
Aparece en las colecciones: | (ICMA) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
13
checked on 06-abr-2024
WEB OF SCIENCETM
Citations
11
checked on 26-feb-2024
Page view(s)
287
checked on 22-abr-2024
Download(s)
104
checked on 22-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.